november 2001 international gcse -...

NOVEMBER 2001

INTERNATIONAL GCSE

MARK SCHEME

MAXIMUM MARK : 80

SYLLABUS/COMPONENT : 0625/02

PHYSICS(CORE)

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of 5 Mark Scheme Syllabus PaperIGCSE Examinations - June 2001 0625 2

NOTES ABOUT MARK SCHEME SYMBOLS

B marks are independent marks, which do not depend on any other marks. For aB mark to be scored, the point to which it refers must actually be seen in thecandidates answer.

M marks are method marks upon which accuracy marks (A marks) later depend. Foran M mark to be scored, the point to which it refers must be seen in acandidates answer. If a candidate fails to score a particular M mark, thennone of the dependent A marks can be scored.

C marks are compensatory method marks which can be scored even if the points towhich they refer are not written down by the candidate, provided subsequentworking gives evidence that they must have known it. e.g. if an equationcarries a C mark and the candidate does not write down the actual equationbut does correct working which shows he knew the equation, then the Cmark is scored.

A marks are accuracy or answer marks which either depend on an M mark, or allow aC mark to be scored.

c.a.o. means correct answer only

e.c.f. means error carried forward i.e. if a candidate has made an earlier mistakeand has carried his incorrect value forward, he may be given marksindicated by e.c.f. provided his subsequent working is correct, bearing inmind his earlier mistake. This prevents a candidate being penalised morethan once for a particular mistake, but only applies to marks annotatede.c.f..

e.e.o.o. means each error or omission

brackets ( ) around words or units in the mark scheme are intended to indicate wordingused to clarify the answer, but the marks do not depend on seeing the wordsor units in brackets. e.g. 10 (J) means that the mark is scored for 10,regardless of the unit given.

underlining indicates that this must be seen in the answer offered, or something verysimilar.

un.pen. means unit penalty. An otherwise correct answer will have one markdeducted if the unit is wrong or missing. This only applies where specificallystated in the mark scheme. Elsewhere, incorrect or missing units arecondoned.

OR indicates alternative answers, any one of which is satisfactory for scoring themarks.

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QUESTION SCHEME TARGETGRADE

MARK

1 (a) 16 (cm) F B1

(b) 16/8 e.c.f. C C1

2 (cm) e.c.f. C A1

3

2 wider base F B1

idea of lowering C of M (however expressed)

e.g. heavier base, make it shorter

C B1

2

3 (a) heat it F B1

(b) increases F B1

(c) any suitable example F B1

(d) any suitable example C B1

4

4 (a) ray refracted down F M1

parallel to incident ray (by eye) C A1

(b) (i) T.I.R. shown C M1

correct angle (by eye) if wrong but labelled 50, then 3 C A1

(ii) ray strikes surface at more than C.A. C A1

(c) straight on at first surface F M1

straight on at second surface F A1

7

5 (a) should be refraction at first surface (however expressed) F B1

should be dispersion at first surface (however expressed) C B1

(b) (i) thermometer / thermocouple / bolometer / hand /

thermopile / thermistor / thermochromic paper (any one) /

goggles

NOT I.R. detector

F B1

(ii) I. R. shown above red C B1

(c) any two fromradio (or TV), microwave, ultra-violet (or UV), x-rays, -rays(NOT cosmic)

2F B1, B1

6

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MARK

6 (a) bar magnet held at each end of rod, stated somewhereor clearly implied(ALLOW side rather than end)

C B1

(i) magnet wont attract / repel (either end) F B1

(ii) magnet attracts both ends F B1

(iii) magnet repels (one end)OR the one left after the others are identified

F B1

(b) (i) iron (allow ferromagnetic) F B1

(ii) electricity / current (in coil)connect to batteryNOT current through core

F B1

(iii) switch off current OR equiv.NOT switch off electromagnetNOT demagnetise

F B1

7

7 (a) mention of a fault / short-circuitlarge current NOT increased currentoverheating of cablesfire

any two

NOT damageNOT explosion

2F B1, B1

(b) (electric) shock F B1

water conducts / transfers electricity (NOT water andelectricity dont mix)ALLOW water is a good conductor

C B1

(c) possible short circuit OR possible (electric) shock C B1

5

8 (a) some indication that nucleus changes C B1

any particle emitted F B1

becomes a different atom / nucleus / nuclide / element C B1

(b) (i) 5 (min) F B1

(ii) 4 OR 20/his half-life correctly evaluated C B1

(iii) 25 5....nothing else C B1

(c) 0 2 2 F, C B2 (-1 eeoo)

1 0 0NOT -1accept a dash as a zero

F, C B2 (-1 eeoo)

10

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MARK

9 (a) (i) (milli)ammeter OR multimeter set to amp / current range F B1

(ii) A e.c.f. F B1

(iii) voltmeter OR multimeter set to volt / p.d. rangecondone incorrect spelling

F B1

(iv) V e.c.f. F B1

(b) (i) resistorALLOW resistance

F M1

variableRHEOSTAT gets M1, A1 NOT potentiometer

F A1

(ii) vary current OR vary p.d. across R NOT vary resistanceOR vary readings (on meters)

C B1

(c) (i) find gradient OR choose one point and use p.d./current F B1

(ii) correct figures from graph seen or implied F B1

5 e.c.f. (but NOT from wrong formula) F B1

OR ohm C B1

(d) (i) greater F B1

(ii) straight line through origin F M1

greater slope e.c.f. from (i )mark to his (i)ALLOW new graph on p11; mark by eye

C A1

14

10 (a) (i) aluminium F M1

greatest density OR because mass incr. as density incr. F A1

(ii) aluminium OR his (a) (i) F B1

(iii) aluminium OR his (a) (i) F B1

(b) A C M1

smallest area C A1

(c) (i) small area OR because pressure incr. as area decr. C B1

great pressure (on sand) F B1

(ii) any sensible suggestion involving larger area in contactwith sand(must involve chair and sand)

F B1

9

11 (a) temperature NOT C ACCEPT boiling point (of water) F B1

(b) mercury OR alcohol OR pentane F B1

(c) 100-100.1 F B1

C NOT C or C F B1

special cases373K B2212F B2

(d) stays the same OR nothing C B1

(e) ice F M1

pure OR melting C A1

any detail of sensible apparatus C A1

8

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MARK

12 (a) (i) bigger temperature difference (idea of) C B1

(ii) the glass is thin OR the window is a good conductorOR because it isnt double-glazed

F B1

(b) sum of figures quoted, seen F C1

4 150 000 (J/hour) C A1

(c) convectionradiationthrough roof /ceilingthrough floordraughtsopening door / window

ANY one

NOT switching on air conditioning

F B1

5

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www.xtremepapers.net

June 2003

INTERNATIONAL GCSE

MARK SCHEME

MAXIMUM MARK: 80

SYLLABUS/COMPONENT: 0625/02

PHYSICS

Paper 2 (Core)

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Mark Scheme Syllabus Paper

IGCSE EXAMINATIONS JUNE 2003 0625 2

University of Cambridge Local Examinations Syndicate 2003


B marks are independent marks, which do not depend on any other marks. For aB mark to be scored, the point to which it refers must actually be seen inthe candidates answer.

M marks are method marks upon which accuracy marks (A marks) later depend.For an M mark to be scored, the point to which it refers must be seen inthe candidates answer. If a candidate fails to score a particular M mark,then none of the dependent A marks can be scored.

C marks are compensatory method marks which can be scored even if the pointsto which they refer are not written down by the candidate, providedsubsequent working gives evidence that they have known it, e.g. if anequation carries a C mark and the candidate does not write down theactual equation but does correct working which shows he knew theequation, then the C mark is scored.

A marks are accuracy or answer marks which either depend on an M mark, orallow a C mark to be scored.

c.a.o. means correct answer only.

e.c.f. means error carried forward. This indicates that if a candidate hasmade an earlier mistake and has carried his incorrect value forward tosubsequent stages of working, he may be given marks indicated bye.c.f. provided his subsequent working is correct, bearing in mind hisearlier mistake. This prevents a candidate being penalised more thanonce for a particular mistake, but only applied to marks annotatede.c.f..

e.e.o.o. means each error or omission.

Brackets ( ) around words or units in the mark scheme are intended to indicatewording used to clarify the mark scheme, but the marks do not dependon seeing the words or units in brackets, e.g. 10 (J) means that themark is scored for 10, regardless of the unit given.

Underlining indicates that this must be seen in the answer offered, or somethingvery similar.

Un.pen. means unit penalty. An otherwise correct answer will have one markdeducted if the unit is wrong or missing. This only applies wherespecifically stated in the mark scheme. Elsewhere, incorrect or missingunits are condoned.

OR/or indicates alternative answers, any one of which is satisfactory forscoring the marks.

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QUESTION SCHEMETARGETGRADE

MARK

1 (a) 8 F B1

(b) EITHER ORgreater smallerAND ANDThickness of rule thread stretched when

on ruleOR overlap at ends OR worn rule ends

F B1 2

2 (a) (i) 10 F B1

(ii) stretch OR shape (or suitable sketch) C B1

(b) (i) 120 F B1

(ii) up(wards) OR vertical (NOT vertically down)Accept arrow on diagram

F B1

(iii) increase size/area of blocks/larger blocksOR increase number of blocksOR less soil in pot (NOT put pot on harderground)

F B1 5

3 (a) 0.97 0.51

0.46

F

F

C1

A1

(b) (i) 15 F B1

(ii) 515 e.c.f. C B1

(iii) D = M/V in any form, seen or implied(words/letters/mix)

F C1

EITHER OR OR

460515

0.46515

0.46515 10-6 e.c.f.

C C1

0.8932 8.932 10-4 893.2No e.c.f. C C1(any number of significant figures)

0.89 8.9 10-4 890 (e.c.f. forsignificantfigures)

C A1

g/cm3 kg/cm3 kg/m3 F B1(0.89 kg/dm3 isOK)

(NOT 8.9-04) 9

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4 (a) idea of air molecules moving (allow vibrating)(N.B. collide = moving)

idea of air molecules striking something (condonethemselves)

idea of air molecules striking walls

F

F

C

C1

C1

A1

(b) (i) moves down F B1

(ii) increases (e.c.f.)

idea of more collisions must follow(per unit time) (e.c.f.) from (i)

OR PV

1

F

C

M1

A1 6

5 (a) line starting at 0 oC

reasonably horizontal line at any temp for half thetime

horizontal from zero time as far as dotted line (ignoreanything to R. of line)

F

C

C

B1

M1 mark along-

side graph

A1

(b) (i) water boils OR heat loss =heat supplied (NOT evaporates/turns to gas) mark (i)

and (ii)(ii) gives water/molecules energy to together

escape OR break bondsOR change state OR heat lossfrom sides/surface/to air

C

C

B1

B1 5

6 (a) (i) normal correct, by eye F B1 mark along-

(ii) reflected ray correct, by eye (ignore normal; ignore any arrow)

F B1 side diagram

(iii) both i and r correctly marked (condone sloppy normal and sloppy refracted ray)

F B1

(b) parallel to ray striking mirror 1 (allow incident ray)OR same direction (NOT equal/same as)(N.B. sentence must be completed, i.e. no inferencefrom line on diagram)

C B1 4

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7 (a) 680 1020 1360 1700 F B1

(b) 5 points plotted2

1 small square (-1 e.e.o.o.)

ignore 0,0 (e.c.f.)

reasonable line through his points drawn with rule/thickness reasonable

F

F

B2

B1

(c) (i) flash

light travels quickly OR sound travels slowly (accept figure)

light travels faster than sound (accept figure)

light travels much faster than sound (accept figures)

F

F

F

C

B1

C1

C1

A1

(iii) 1400 - 1450 OR correct value from his graph

2

1 square

clear and correct indication on graph of howobtained (minimum: dot at appropriate point)

F

F

B1

B110

8 (a) Charge(s) OR energy (NOT electricity (condone asextra), charged particles (condone as extra), current,electrons (condone as extra), voltage)

C B1

(b) (i) 0

(ii) mention of 6V

mention of rising OR not instantaneous (NOTreads)

(iii) any realistic example of something turnedon/off after a time lapse, e.g. electronic eggtimer, turn-off bedside radio

C

F

C

F

B1

B1

B1

B1 6

9 (a) (i) wire shown curved between A and B

wire displaced all along between A and B,and reasonably smooth

(ii) idea of force (in any direction)

on current/current-carrying conductor

when in magnetic field

F

C

F

C

C

C1 mark along- side A1 diagram

M1

A1

A1

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(b) line curved in opposite direction F B1 mark 6 along- side diagram

10 (a) (i) electrons OR cathode rays (NOT beta-particles)

something hitting the screen (NOT form aspot)

idea of fluorescence (of the screen, NOT thegas)

(ii) focus

(iii) time base OR ms/cm

(iv) electrons/cathode rays deflected (e.c.f. from(i); allow attracted if intention clear)

something deflected horizontally

some idea of repeated sweeps/back andforth

F

F

C

C

C

F

C

C

B1

B1

B1

B1

B1

B1

M1

A1

(b) (i) (y-)input (allow y-plates)

(ii) 1. trace moves horizontally/sideways/left/right

2. trace moves vertically/up/down

F

C

C

B1

B1

B111

11 (a) Connection to either side of cell, but not shorted out

VR in series with lamp, and not shorted out ORcorrectly connected as a potential divider (condoneinclusion of a switch)

F

F

B1

B1

(b) (i) R1 + R2

12

F

F

C1

A1

(ii) 1. Resistance = p.d./current in any form(words/letters/mix)

6/12 e.c.f.

0.5 or2

1 e.c.f.

F

C

C

C1

C1

A1

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2. his calculated current

his calculated current all 3

his calculated current

A OR amp OR ampere somewhere in (ii)

C

F

B1

B1

(iii) voltmeter shown correctly connected (any recognisable symbol; allow re-drawn circuit)

C B1 mark 10 along- side diagram

12 (a) his weight F B1

(b) distance OR height F B1

(c) (i) 1000N climber OR heavier OR first

(ii) his answer to (i)

F

F

B1

B1

(d) (i) chemical (accept fuel)

(ii) food (accept muscles)

(iii) maintaining body function

heat loss any 1K.E.sounds

Mark first correct answer, condone extras

C

C

C

B1

B1

B1 7

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November 2003

INTERNATIONAL GCSE

MARK SCHEME

MAXIMUM MARK: 80


PHYSICS

Paper 2 (Core)

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PHYSICS NOVEMBER 2003 0625 2


B marks are independent marks, which do not depend on any other marks. For

a B mark to be scored, the point to which it refers must actually be seen in the candidates answer.

M marks are method marks upon which accuracy marks (A marks) later depend. For an M mark to be scored, the point to which it refers must be seen in the candidates answer. If a candidate fails to score a particular M mark, then none of the dependent A marks can be scored.

C marks are compensatory method marks which can be scored even if the points to which they refer are not written down by the candidate, provided subsequent working gives evidence that they have known it, e.g. if an equation carries a C mark and the candidate does not write down the actual equation but does correct working which shows he knew the equation, then the C mark is scored.

A marks are accuracy or answer marks which either depend on an M mark, or allow a C mark to be scored.


e.c.f. means error carried forward. This indicates that if a candidate has made an earlier mistake and has carried his incorrect value forward to subsequent stages of working, he may be given marks indicated by e.c.f. provided his subsequent working is correct, bearing in mind his earlier mistake. This prevents a candidate being penalised more than once for a particular mistake, but only applied to marks annotated e.c.f..


Brackets ( ) around words or units in the mark scheme are intended to indicate wording used to clarify the mark scheme, but the marks do not depend on seeing the words or units in brackets, e.g. 10 (J) means that the mark is scored for 10, regardless of the unit given.

Underlining indicates that this must be seen in the answer offered, or something very similar.

Un.pen. means unit penalty. An otherwise correct answer will have one mark deducted if the unit is wrong or missing. This only applies where specifically stated in the mark scheme. Elsewhere, incorrect or missing units are condoned.

OR/or indicates alternative answers, any one of which is satisfactory for scoring the marks.

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QUESTION SCHEME TARGET GRADE

MARK

1 (a) (i) G within block, to left of vertical through midpoint or AB F B1

(ii) Vertical line shown through A C B1

(b) A

more stable (or equivalent statement) e.g. less likely to topple or weight within base

F

F

M1

A1

(c) so it does not topple over (or equivalent) F B1

5

2 reference mark on wheel

datum line (could be top or bottom)

*start timing/stopwatch as mark passes datum line

*(use stopwatch to) time gets only one of these

time a number of rotations (accept 1 here)

time at least 20 rotations

*stop stopwatch

divide time by number of rotations

repeat

make sure stopwatch at zero

5C B5

5

3 gravitational OR potential OR PE OR GPE F B1

motion OR KE OR kinetic

heat/internal/thermal

sound

3F

B3

heat (accept potential)

OR internal/thermal

NOT strain potential/NOT chemical potential

NOT sound, even as an extra

C B1

5

4 (a) vehicle 2 F M1

large(r) area (in contact with ground) C A1

low/less pressure C A1

less likely to sink/get stuck F A1

(b) (i) small area F C1

large pressure F B1

(ii) (weight spread over) large(r) area NOT body area C B1

small/less pressure C B1

reference to weight somewhere in (b) C B1

9

5 (a) (i) ray perpendicular to surface at A (by eye) F B1

(ii) normal at B correct (by eye) F B1

(iii) ray refracted down at B, but NOT along surface C B1

(iv) normal at D correct (by eye) F B1

(v) ray refracted up at D, but NOT along surface C B1

any 5

any order (1 eeoo)

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(b) converging OR will meet OR *one up, one down ALLOW * C B1

opposite *only if diagram acceptable

same deviation (or equivalent) OR angles of refraction same

C B1

(c) straight on OR split (depending on thickness of ray) OR no change (indirection) OR not refracted

F B1

8

6 (a) (i) speed F B1

(ii) frequency, ALLOW wavelength C B1

(iii) wavelength F B1

(b) gamma OR OR cosmic

condone x-rays as an extra

C B1

4

7 (a) straight line sloping up to right F B1

through origin F B1

(b) (i) voltmeter OR multimeter on volts range (condone spelling) F B1

(ii) potential difference OR p.d. OR volts/voltage (no e.c.f.) F B1

(iii) ammeter OR multimeter on current/amps range (condone spelling)

F B1

(iv) current OR intensity OR amps/amperes OR ampage (no e.c.f.) NOT A

F B1

(v) evidence of 7.5

evidence of 0.3

F

F

C1

C1

7.5/0.3 OR V/I OR volts/current e.c.f. if written down

25 e.c.f. only if V/I used

or ohm

C

C

C

C1

A1

B1

(vi) hisR/50

0.5 (/m) e.c.f.

F

C

C1

A1

13

8 (a) EITHER

iron filings

NOT put sprinkle/spread/pour/scatter

tap card

further detail

OR

(plotting) compass

place near end of magnet 0000

mark end(s) of compass

further detail

F

F 0000000

C

C

B1

B1 000000

B1

B1

(b) attraction of compass S pole

repulsion of compass N pole

attraction of S pole of another magnet

repulsion of N pole of another magnet

attraction of Earths N pole

repulsion of Earths S pole

F

B1

5

any 1

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9 (a) (i) decreases

by 2

F

C

M1

A1

(ii) decreases

by 2

F

C

M1

A1

(iii) decreases C B1

(b) 66 (yrs)

evidence of 3 half-lives

fraction 1/8 seen or implied

400

F

C

C

C

C1

C1

C1

A1

9

10 (a) points plotted correctly

2

1 small square (1 eeoo) ignore

0,0 (1 for very large blobs)

3F B3

(b) 45 circled OR 2 circles ACCEPT point circled on graph F B1

(c) idea of stretching more than before (for same load increase) OR reference to elastic/proportional limit in some way

C B1

(d) EITHER

measure unloaded length ALLOW measure spring NOT extension

OR

idea of fixed end and free end

F

B1

measure loaded length NOT extension

note position of free end, no load

F B1

subtract measure movt. free end, loaded

F B1

8

11 (a) (i) 100 F B1

(ii) 0 F B1

(iii) indication to the left of 0C mark C B1

(b) expansion of a solid

expansion of a gas/pressure of a gas

current/pd/e.m.f. of a thermocouple

conductivity/resistance of a conductor/wire/thermistor..

colour of a hot wire

melting of a wax

NOT expansion of alcohol ACCEPT density of a liquid

C

B1

4

12 (a) N1/N2 = V1/V2 in any form F C1

8000/N2 = 240/6 or correct substitution into correct equation F C1

200 ALLOW B1 for 20 if 800 used instead of 8000 (working must be shown)

F A1

(b) (i) 200 e.c.f. i.e. his (a) F B1

(ii) 400 e.c.f. i.e. 2 x his (a), evaluated C B1

5

any 1

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June 2004

INTERNATIONAL GCSE

MARK SCHEME

MAXIMUM MARK: 80


PHYSICS

Paper 2 (Core)

9Dwebsite.tk



PHYSICS - JUNE 2004 0625 2

University of Cambridge International Examinations 2004


B marks are independent marks, which do not depend on any other marks. For a

B mark to be scored, the point to which it refers must actually be seen in the candidates answer.

M marks are method marks upon which accuracy marks (A marks) later depend. For an M mark to be scored, the point to which it refers must be seen in the candidates answer. If a candidate fails to score a particular M mark, then none of the dependent A marks can be scored.

C marks are compensatory method marks which can be scored even if the points to which they refer are not written down by the candidate, provided subsequent working gives evidence that they have known it, e.g. if an equation carries a C mark and the candidate does not write down the actual equation but does correct working which shows he knew the equation, then the C mark is scored.



e.c.f. means error carried forward. This indicates that if a candidate has made an earlier mistake and has carried his incorrect value forward to subsequent stages of working, he may be given marks indicated by e.c.f. provided his subsequent working is correct, bearing in mind his earlier mistake. This prevents a candidate being penalised more than once for a particular mistake, but only applies to marks annotated e.c.f.


Brackets ( ) around words or units in the mark scheme are intended to indicate wording used to clarify the mark scheme, but the marks do not depend on seeing the words or units in brackets, e.g. 10 (J) means that the mark is scored for 10, regardless of the unit given.

Underlining indicates that this must be seen in the answer offered, or something very similar.

Un.pen. means unit penalty. An otherwise correct answer will have one mark deducted if the unit is wrong or missing. This only applies where specifically stated in the mark scheme. Elsewhere, incorrect or missing units are condoned.


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QUESTION SCHEME TARGET GRADE

MARK

1

(a)

10

F

B1

(b)

(c)

division by 5 OR division by 6 2.0 OR 2 c.a.o 10 his(b) OR 11 his(b) 20 c.a.o

F

C

F

C

C1

A1

C1

A1 5

2

(a)

straight vertical arrow upwards to/from rail arrow to R of centre of rail arrow at R.H. end of rail (within 2 width of resting block)

F

F

F

B1

C1

A1

(b) moment ticked

F B1

(c) reduce weight/mass OR shorten rail, lighter rail, thinner rail, open sideways, suitable long handle, suitable 2 pulley system

F

B1 5

3

(a)

PQ or 0-50s or the horizontal part NOT just P or just Q

F

B1

(b) changing speed (however indicated) NO e.c.f from (a). ACCEPT acceleration but NOT increasing speed

F B1

(c) distance = area indicated in words or figures anywhere in (c)

F B1

(i) 20 50

1000 (ii) 20 50 OR his(i) 500 (iii) his(i) + (ii) correctly evaluated (iv) his(iii)/100 OR total distance/total time stated correct evaluation

F

F

C

C

F

F

F

C1

A1

C1

A1

B1

C1

A1 10

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4

(a)

(horizontal) force allow F distance (travelled from A to B) condone perpendicular allow D OR d OR S

F

F

B1

B1

(b) goes faster OR less time accelerates

F

C

B1

B1

(c) (i) 2nd person (however expressed) (ii) more work/energy OR bigger force OR pulls harder smaller time OR greater speed (more work/second gets B1, B1)

F

F

C

B1

B1

B1 7

5

(a)

drops OR decreases OR cools down

F

B1

(b)

(c)

idea of loss of molecules (from surface) OR molecules evaporate more energetic/faster molecules (SPECIAL CASE remaining molecules slower B1) any sensible example where cooling is noticeable e.g. (feeling cold) after swimming, sweating, refrigerators

F

C

C

M1

A1

B1 4

6

(a)

(increased) internal energy OR (increased) KE of molecules OR (increased) thermal/heat (energy)

C

B1

(b) any mention of thermal capacity smaller thermal capacity

C

C

C1

A1 3

7

(a)

light wave fastest ) ) water wave slowest )

2F

B1+B1

(b)

(c)

longitudinal transverse transverse light wave ticked use + = 0 if extras

F

C

F

F

B1

B1

B1

B1 6

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8

A magnet OR magnetised B magnet OR magnetised C iron OR unmagnetised D aluminium

F F C C

B1 B1 B1 B1 4

9 (a) points plotted correctly ( small square)

3F

B3 (-1 eeoo)

(b)

(c)

(d)

smooth curve through points by eye, not too thick correct construction lines shown (allow dot on curve at correct place) correct value from his graph, based on 800-400 ( square) (i) smaller (ii) the same OR no change

F

C

F

F

C

B1 B1 B1 B1 B1 8

10

(a)

(i) less turns on secondary

ACCEPT because Np=4800 and Ns=200 ACCEPT sycoil < pycoil NOT secondary < primary

(ii) V2/V1 = N2/N1 in any form

correct substitution 10

(iii) 1. decreases

2. runs slower OR will not work e.c.f. from (iii)1.

F

F

F

F

F

F

B1

C1

C1

A1

B1

B1

(b) ignore stage 1 from stage 2 onwards B ) E ) (3 marks for any 3) A ) (2 marks for any 2) D ) (1 mark for any 1)

3C

B3 9

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11 (a)

(i) thermistor (ii) variable resistor (accept rheostat) (iii) light-dependent resistor (ACCEPT LDR)

F

F

F

B1

B1

B1

(b)

(i) 1. resistance = p.d./current OR R=V/I

OR any correct reorganization ACCEPT mixture of words and letters

2. 12/0.5 OR correct sub in his 1, if shown 24 c.a.o OR ohm

F

F

F

C

B1

C1

A1

B1

(ii) 1. decreases

2. idea of greater resistance 3. dimmer OR does not glow/work/shine NOTE: NO e.c.f. in (ii)

F

F

C

B1

B1

B1 10

12

(a)

(i) beard tip to dot perpendicular to mirror (by eye) distance beard tip to mirror = dist. mirror to dot (by eye) (ii) reflected ray along line from eye to his dot (by eye) incident ray from beard tip to join reflected ray at mirror arrows from beard to eye (iii) virtual (iv) angle of incidence = angle of reflection OR i = r OR they are equal OR sini = sinr

F

F

C

C

C

C

F

B1

B1

M1

A1

B1

B1

B1

(b) (i) right hand (ii) mark shown under L.H. eye on Fig. 11.2

F

F

B1

B1 9

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November 2004

INTERNATIONAL GCSE

MARK SCHEME

MAXIMUM MARK: 80


PHYSICS Theory

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IGCSE November 2004 0625 2


Question Scheme Target Grade

Mark

1 (a) 96 F B1

(b) top left eye circled F B1

(c) 100 96 e.c.f. F C1

4 e.c.f. F C1

4/80 e.c.f. F C1

0.05 e.c.f. F A1

6

2 (a) (i) 21 F B1

(ii) 1 increases F B1

2 falls ) ) both e.c.f. 3 rises )

F B1

(b) (i) same C B1

(ii) greater (accept comparison of directions) C B1

5

3 (a) (i) 0.6 x 0.5 x 0.2 F C1

0.06 F A1

m3 C B1

(ii) mass/volume F C1

7.2/his(i) F C1

120 e.c.f. F A1

kg/m3 C B1

(b) (i) greater than ticked C B1

(ii) Because of the air in the corrugated cardboard C B1

9

4 (a) (i) chemical ) internal OR heat OR thermal ) any 2 but also accept )

nuclear OR kinetic OR potential for one of the marks

2F B1, B1

(ii) radiation F B1

(b) (i) K.E. OR kinetic OR motion C B1

(ii) conduction F B1

(iii) 1 gravitational OR P.E. OR potential OR position

F B1

2 chemical/fuel/food C B1

7

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5 (a) bright specks OR (smoke) particles OR dots NOT molecules, NOT air particles

F B1

something moving (however expressed) F M1

rapidly OR randomly OR zig-zag F A1

(b) air molecules OR air particles (NOT just air) C M1

collisions between smoke particles and air mols/particles

C A1

invisible ) fast moving ) any 2 random )

2C B1, B1

(c) Idea of faster movement or more jerky movement F B1

8

6 (a) aluminum F B1

copper F B1

gold F B1

(b) insulator NOT non-conductor F B1

(c) (i) copper OR aluminum OR gold F B1

(ii) any of the insulators F B1

(d) convection F B1

(e) intelligent mention of convection currents C B1

(accept to make sure always covered by water NOT heat rises)

8

7 (a) (i) speed = distance/time in any form F C1

correct substitution in his equation OR 1600/5 F C1

320 c.a.o. F A1

(ii) light travels instantaneously/very fast OR reference to reaction time

NOT just faster than sound C B1

(b) explosion heard sooner/less than 5s ) second sound/echo/reflection (from ) any 2 rock face) ) louder )

2C B1, B1

6

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8 repulsion F B1

repulsion F B1

attraction F B1

attraction C B1

attraction C B1

5

9 (a) (i) 3 ) 3 ) both

F B1

(ii) 10 + 10 F C1

20 F A1

(b) (i) 1 1.5A ticked F B1

2 3A OR 3.0A C B1

(ii) 5 ticked C B1

6

10 (a) electrons F B1

(b) neutrons OR atoms F B1

(c) electrons F B1

(d) electrons F B1

(e) protons C B1

neutrons C B1

(f) protons C B1

neutrons C B1

8

11 (a) (i) A or E F B1

(ii) CE or AC or 2.5 cm F B1

(b) real ) )

inverted ) mark in pairs using + = 0

) enlarged )

2f, 1C B1, B1, B1

(c) any ray from 0 to I refracting at mid-line of lens or refractions at both surfaces

F B1

6

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12 (a) (i) line from B to intersection F B1

(ii) dot at printed intersection F B1

(b) L.H. ornament C M1

lower C of M C A1

(c) block A F M1

narrower/smaller base F A1

6

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NOTES ABOUT THE MARK SCHEME SYMBOLS

B marks are independent mark, which do not depend on any other marks. For a B mark to be scored, the point to which it refers must actually be seen in the candidates answer.

M marks are method marks upon which accuracy marks (A marks) later depend. For an M mark to be scored, the point to which it refers must be seen in a candidates answer. If a candidate fails to score a particular M mark, then none of the dependent A marks can be scored.

C marks are compensatory method marks which can be scored even if the points to which they refer are not written down by the candidate, provided subsequent working gives evidence that they must have known it. e.g. if an equation carries a C mark and the candidate does not write down the actual equation but does correct working which shows he knew the equation, then the C mark is scored.



e.c.f. means error carried forward. This indicates that if a candidate has made an earlier mistake and has carried his incorrect value forward to subsequent stages of working, he may be given marks indicated by e.c.f. provided his subsequent working is correct, bearing in mind his earlier mistake. This prevents a candidate being penalised more than once for a particular mistake, but only applies to marks annotated e.c.f.

e.e.o.o means each error or omission

brackets () Around words or units in the mark scheme are intended to indicate wording used to clarify the mark scheme, but the marks do not depend on seeing the words or units in brackets. e.g. 10 (J) means that the mark is scored for 10, regardless of the unit given.

underlining Indicates that this must be seen in the answer offered, or something very similar.

un.pen. means unit penalty. An otherwise correct answer will have one mark deducted if the unit is wrong or missing. This only applies where specifically stated in the mark scheme. Elsewhere, incorrect or missing units are condoned.

OR/or Indicates alternative answers, any one of which is satisfactory for scoring the marks.

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June 2005

IGCSE

MARK SCHEME

MAXIMUM MARK: 80


PHYSICS Theory

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IGCSE JUNE 2005 0625 2


Question Scheme Target Grade

Mark

1 (a) 100 20 F C1

level shown at 80 (ignore meniscus) 1mm (need not actually draw surface)

F A1

(b) (i) 16 (cm) F B1

(ii) sub of (i) into formula F C1

sub of 100 into formula F C1

6.25 e.c.f. from (i) F A1

cm2 C B1

Accept working from any two correct values 7

2 (a) 2100 900 F C1

12 OR 10.06 (i.e. travel time) F A1

(b) 1500 (ignore unit) OR 15.00 OR 1500 to 1800 F B1

(c) 1 F B1

(d) (i) find area of first trapezium (or equivalent) bold area under graph

C B1

(ii) find total area C M1

divide by total time OR divide by 12 OR divide by travel time

C A1

7

3 (a) it turns F M1

clockwise C A1

(b) (i) stationary OR nothing F B1

(ii) horizontal arrow (intention of from OR to pivot - condone gap, if clear)

F M1

to left F A1

10 (N) C B1

6

4 (a) gravitational F B1

(b) kinetic F B1

(c) kinetic C B1

(d) electrical F B1

(e) internal ACCEPT heat condone valid extras C B1

5

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5 (a) (i) increased F B1

(ii) molecules move faster/have more energy C B1

OR collisions more energetic

more frequent collisions (condone with each other)/harder collisions

C B1

collisions with walls C B1

idea of collisions causing a force C B1

(b) (i) evaporation F B1

(ii) energy of molecules increases/molecules move faster

C B1

molecules escape/break bonds F C1

faster/higher energy molecules escape C A1

9

6 (a) resistance = voltage/current in any form, letters, words, figures, mix

F C1

330 6.3 2F A1+A1

(b) candidates 4 points correctly plotted small square -1 e.e.o.o.

2F B2

(c) (i) reasonable curve, smooth, not too thick F B1

(ii) resistance/temperature changes smoothly C B1

(d) (i) 1500 - 1700 OR candidates lowest point on graph, quoted correctly

C B1

(ii) idea of lowest resistance C B1

9

7 (a) (from L to R) infra red (OR wave)/ ultra violet/

x rays/gamma rays 4F B1 x 4

sound ticked F B1

5

8 (a) one 90 deviation at 1st mirror, by eye F C1

two 90 deviations at 1st mirror, by eye F A1

emerging rays parallel to incident rays, by eye F B1

(b) upside down OR inverted OR same size OR real C B1

4

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9 (a) speed = distance/time ) ) in any form OR speed = 2 x distance/time )

F C1

2 x 249/332 F C1

1.5 F A1

(b) 0.75 and 2.25 ticked e.c.f. use + x = 0 for extras

2C B1 + B1

Mark (b) independent of (a) 5

10 (a) (i) conductor OR metal F B1

(ii) metal (but not if answer to (i)) OR any named metal OR any named liquid conductor

F B1

(ii) apply an e.m.f. OR apply a p.d. OR equivalent C B1

(b) (i) insulator NOT non-conductor (but condone as extra)

F B1

(ii) any suitable example F B1

(c) insulator OR (b)(i) e.c.f. from (b)(i) NOT just the name of a type of insulator

F B1

6

11 (a) same ticked F B1

(b) 2 C B1

(c) R1 + R2 in any form, letters or numbers F C1

4 e.c.f. from (b) C A1

(d) (i) 1 ticked F B1

(ii) more than 0.3A ticked C B1

(e) (i) increases/stretches F B1

(ii) increases c.a.o. C B1

8

12 (a) 1 (unit) / neutral / zero / in nucleus

1/1800 (unit) OR tiny / -1 (unit) / in orbit OR outside nucleus

OR 2000

1 OR negligible NOT just negative OR

in shell NOT zero

4F,2C B1 x6

(b) (i) proton and neutron F B1

(ii) 1. 4 (units) C B1

2. (+)2 (units) NOT -2 C B1

9

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NOTES ABOUT THE MARK SCHEME SYMBOLS

B marks are independent markS, which do not depend on any other marks. For a B mark to be scored, the point to which it refers must actually be seen in the candidates answer.





e.c.f. means error carried forward. This indicates that if a candidate has made an earlier mistake and has carried the incorrect value forward to subsequent stages of working, the candidate may be given marks indicated by e.c.f. provided the subsequent working is correct, bearing in mind the earlier mistake. This prevents a candidate being penalised more than once for a particular mistake, but only applies to marks annotated e.c.f.

e.e.o.o means each error or omission

brackets () Around words or units in the mark scheme are intended to indicate wording used to clarify the mark scheme, but the marks do not depend on seeing the words or units in brackets. e.g. 10 (J) means that the mark is scored for 10, regardless of the unit given.

underlining Indicates that this must be seen in the answer offered, or something very similar.

un.pen. means unit penalty. An otherwise correct answer will have one mark deducted if the unit is wrong or missing. This only applies where specifically stated in the mark scheme. Elsewhere, incorrect or missing units are condoned.

OR/or Indicates alternative answers, any one of which is satisfactory for scoring the marks.

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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS

International General Certificate of Secondary Education

MARK SCHEME for the November 2005 question paper

0625 PHYSICS

0625/02 Paper 2 (Theory)

Maximum mark 80

This mark scheme is published as an aid to teachers and students, to indicate the requirements of the examination. It shows the basis on which Examiners were initially instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners meeting before marking began. Any substantial changes to the mark scheme that arose from these discussions will be recorded in the published Report on the Examination. All Examiners are instructed that alternative correct answers and unexpected approaches in candidates scripts must be given marks that fairly reflect the relevant knowledge and skills demonstrated. Mark schemes must be read in conjunction with the question papers and the Report on the Examination. The minimum marks in these components needed for various grades were previously published with these mark schemes, but are now instead included in the Report on the Examination for this session.

CIE will not enter into discussion or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the November 2005 question papers for most IGCSE and GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

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IGCSE NOVEMBER 2005 0625 2


MARK

1 (a) 8.5 (cm) B1

(b) 19.0 OR 19 ( 0.1) (cm) B1

(c) his (b) his (a) C1

his correct subtraction A1 [4] 2 (a) distance/time C1

25/2 C1

12.5 A1

m/s B1

(b) less OR decreased OR slowing down B1

(c) more than ecf B1 [6] 3 (a) skate M1

small area (in contact with ice) A1

(b) large area ) wind causes large force on side of truck ) any 2 B1,B1 vehicle liable to blow over ) [4] 4 (a) 40 or 160 B1

(b) 720 B1

(c) W = F x d C1

720 x 0.2 C1

144 A1

J OR joule B1

(d) his(c)/1.2 C1

his(c)/1.2 correctly evaluated C1

0.5 x his(c)/1.2 correctly evaluated A1 i.e. 60 gets C1, C1, A1 and 120 gets C1, C1, A0) W OR watt OR J/s B1 [10]

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5 (a) level in tube lower, or equivalent B1

(b) air has expanded (could be scored in (a), but not twice) OR Kinetic Theory application to pressure B1 (c) any sensible comment B1 e.g. limited temp range, air bubbles out of tube, slow acting, large volume of air, change in air pressure, no scale [3] 6 (a) (i) current (in coil) B1

magnetic field (around coil) B1

(ii) magnetised OR attract B1

(b) current zero at first (even if only at origin) B1

horizontal first part B1

vertical rise somewhere B1

horizontal final part B1 [7] 7 (a) three rays parallel and horizontal B1

(b) (i) both principal foci marked B1

(ii) refraction at mid-line, then through F B1 (allow 2 surface refractions if lead back to mid-line)

(iii) ray through F to mid-line, then parallel B1 (allow as (ii))

(iv) image drawn between axis and intersection, perpendicular to axis C B1 (condone no labelling)

drawing accuracy mark for image 2 squares tall 2mm and 4 squares away 2mm B1 [6] 8 (a) (i) iron OR steel OR any ferromagnetic material B1 (B0 if magnetised stated)

(ii) 1. nothing ecf from (i) B1 2. nothing B1

(b) L.H. compass pointing to R B1

top compass pointing to L B1

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bottom compass pointing to L B1 [6] 9 (a) 1 correct C1

2 correct C1

4 correct A1

(b) (i) all 6 components shown in series (any order) B1 ecf from (a) for symbols

(ii) voltmeter connected across cell, either our diag or his B1

(iii) both B1

(iv) 0.5 B1

(v) current stops OR ammeters read zero OR other bulb goes out B1 [8]

10 (a) 10 x 4 x 6.5 C1

260 (cm3) A1

(b) D = M/V in any form, words, letters, numbers, mixed C1

250/his V ecf if written down C1

0.961538 any no. of sig figs ecf C1

0.96 ecf A1

g/cm3 unless inconsistent with his figures B1 [7]

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11 (a) electrons B1

(b) A B1

(c) (i) D B1

(ii) idea of detecting electrons/making spot visible B1

(d) deflects them B1

(e) no air OR no molecules OR no particles OR nothing B1

to stop/slow down/absorb the electrons/cathode rays B1 [7] 12 (a) (i) time taken for (B0 for half the time) B1

activity/count-rate/mass etc. B1

to decrease to half original value B1

(ii) radiation due to surroundings B1

(b) (i) 80 25 C1

55 cao A1

(ii) 1. 27.5 ecf B1

2. 52.5 ecf B1

(iii) 15 1 ecf B1

(iv) background remains, even when source has decayed B1

(v) curve to the left of existing one B1

flattening out at 25 count/min B1

[12]

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MARK SCHEME for the May/June 2006 question paper

0625 PHYSICS

0625/02 Paper 2, maximum raw mark 80

These mark schemes are published as an aid to teachers and students, to indicate the requirements of the examination. They show the basis on which Examiners were initially instructed to award marks. They do not indicate the details of the discussions that took place at an Examiners meeting before marking began. Any substantial changes to the mark scheme that arose from these discussions will be recorded in the published Report on the Examination. All Examiners are instructed that alternative correct answers and unexpected approaches in candidates scripts must be given marks that fairly reflect the relevant knowledge and skills demonstrated. Mark schemes must be read in conjunction with the question papers and the Report on the Examination. The minimum marks in these components needed for various grades were previously published with these mark schemes, but are now instead included in the Report on the Examination for this session.

CIE will not enter into discussion or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the May/June 2006 question papers for most IGCSE and GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

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IGCSE May/June 2006 0625 02


TARGET GRADE MARK 1 (a) larger area F B1 smaller pressure F B1 (b) (i) get larger OR get firmer F B1 (ii) molecules move faster ) more collisions (per second) ) any 2 2C B1 + B1 pressure increased ) (c) (i) increases F B1 (ii) smaller volume F B1 more collisions (per second) C B1 anywhere in (b)(ii) or (c)(ii), collisions with walls C B1 9 2 (a) 6.0 0.1 ) 2.4 0.1 ) -1 each error or omission 2F B2 3.1 0.1 ) (b) AB x BC x CD OR l x b x h OR his figures shown multiplied F B1 (c) cm3 OR cu.cm OR cubic cm F B1 4

3 (a) P and Q F B1

(b) R and S F B1

(c) (i) D = M/V in any form, including our figures F B1

(ii) 57.5/25 C C1 2.3 C A1 g/cm3 C B1 6

4 (a) chemical, gravitational, internal, kinetic 2F,2C B1 x 4 (if more than 4 ticked, use + = 0 )

(b) kinetic NOT internal F B1

(c) potential F B1

(d) chemical C B1 7

5 (a) idea of greater speed F B1 idea of molecules further apart C B1

(b) (i) any suitable example involving expansion or contraction e.g. thermometer, thermostat, bimetal strip, rivets, fitting steel tyres F B1

(ii) any suitable example involving expansion or contraction e.g. expansion gaps in bridges etc, overhead cables, cracking glass C B1 4

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6 (a) (i) wavelength labelled clearly 3mm F C1 wavelength labelled clearly 1mm C A1

(ii) horizontal line F M1 anywhere between top & bottom of wave pattern C A1

(b) (measure time for) (count number of) (measure time) (a number of ) OR (waves passing ) OR (for 1 wave ) F M1 (waves to pass ) ( ) (to pass ) f = no. of waves OR in 1 second OR f = 1/T F A1 time 6

7 (a) ray bent down at first surface F M1 not below normal F A1 ray bent down at second surface C B1

(b) (i) dispersion ticked F B1

(ii) red C B1

(iii) violet C B1 (allow B1,B0 if red and violet both written but interchanged) 6

8 (a) end/point on magnet C B1 idea of pointing N (when freely suspended) F B1

(b) repulsive F B1

(c) (i) S at top and N at bottom F B1

(ii) disappears F B1 5

9 (a) strontium-90 F M1 decays most slowly OR longest half-life F A1

(b) (i) points correctly plotted small square -1 each error or omission 3F B3

(ii) reasonable curve F B1

(iii) 8 (days) 0.5 OR his correct value 0.5 C B1 correct working shown on graph (minimum: dot on line) C B1 8

10 (a) (i) A and B (both) OR A and C (both) C B1

(ii) filament F B1

(iii) electrons ticked F B1

(iv) line along axis (by eye) OR conical beam along axis F B1

(v) light or glow indicated somehow F B1

(b) beam deflection shown F C1 beam deflected upwards C A1 indication of curve (condone curve outside electric field) C B1

(c) idea of no obstruction for cathode rays/electrons C B1 9

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11 (a) (i) 10 x 2.5 F C1 25 (m) F A1 (ii) speed = distance/time in any form F C1 500/10 F M1 50 (s) F A1 (b) 75/2.5 C C1 30 (m/s) C A1 (c) accelerated F B1 (d) total distance = 3000 (m) F C1 total time = 150 (s) F C1 average speed = total distance/total time C C1 3000/150 C C1 20 (m/s) C A1 13 12 L1 joined to R3 or R1 F B1 L2 joined to R4 F B1 L4 joined to R1 F B1 3

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MARK SCHEME for the October/November 2006 question paper

0625 PHYSICS

0625/02 Paper 2 (Core Theory), maximum raw mark 80

This mark scheme is published as an aid to teachers and students, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners meeting before marking began.

All Examiners are instructed that alternative correct answers and unexpected approaches in candidates scripts must be given marks that fairly reflect the relevant knowledge and skills demonstrated.

Mark schemes must be read in conjunction with the question papers and the report on the examination. The grade thresholds for various grades are published in the report on the examination for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses.

CIE will not enter into discussions or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the October/November 2006 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

9Dwebsite.tk



IGCSE - OCT/NOV 2006 0625 2

UCLES 2006


B marks are independent marks, which do not depend on any other marks. For a B mark to be scored, the point to which it refers must actually be seen in the candidate's answer.

M marks are method marks upon which accuracy marks (A marks) later

depend. For an M mark to be scored, the point to which it refers must be seen in a candidate's answer. If a candidate fails to score a particular M mark, then none of the dependent A marks can be scored.

C marks are compensatory method marks which can be scored even if the

points to which they refer are not written down by the candidate, provided subsequent working gives evidence that they must have known it. e.g. if an equation carries a C mark and the candidate does not write down the actual equation but does correct working which shows he knew the equation, then the C mark is scored.

A marks are accuracy or answer marks which either depend on an M mark,

or which are one of the ways which allow a C mark to be scored. c.a.o. means "correct answer only". e.c.f. means "error carried forward". This indicates that if a candidate has

made an earlier mistake and has carried his incorrect value forward to subsequent stages of working, he may be given marks indicated by e.c.f. provided his subsequent working is correct, bearing in mind his earlier mistake. This prevents a candidate being penalised more than once for a particular mistake, but only applies to marks annotated "e.c.f."

e.e.o.o. means "each error or omission". brackets ( ) around words or units in the mark scheme are intended to indicate

wording used to clarify the mark scheme, but the marks do not depend on seeing the words or units in brackets.

e.g. 10 (J) means that the mark is scored for 10, regardless of the unit given.

underlining indicates that this must be seen in the answer offered, or something

very similar. un.pen. means "unit penalty". An otherwise correct answer will have one

mark deducted if the unit is wrong or missing. This only applies where specifically stated in the mark scheme. Elsewhere, incorrect or missing units are condoned.

OR/or indicates alternative answers, any one of which is satisfactory for

scoring the marks.

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UCLES 2006

QU. SCHEME MARK

1 (a) 55 (s) B1

(b) 55/5 ecf C1

11 (s) ecf A1

(c) EITHER OR OR OR

300/hour 1 takes 11s 5 takes 55s 1hour for 300 B1

= 5/min 300 take 3300s 300 take 60x55s 3600/300s for 1 B1

takes less less than 1hr less than 1hr 1 takes less than 1 min for 300 for 300 time than B1 for 5 this

YES/NO ticked according to his working B1 7

2 2nd box ticked B1

3rd box ticked B1 (use + = 0 for extras) 2

3 (a) OP accelerating B1

PQ accelerating B1

QR constant speed B1

RS slowing down (however expressed) B1

(b) O and S (both) B1

(c) 6 (m/s) B1

(d) 70 (s) B1

(e) find area OPQRS (however expressed) B1 8

4 (a) (i) radiation B1

(ii) conduction B1

(b) (i) kinetic (however expressed) B1

potential (however expressed) B1

(ii) idea of energy loss or friction B1 5

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UCLES 2006

5 (a) (magnitude of) force B1

distance (from fulcrum) B1

(b) (i) force B1

moment OR turning effect B1

(ii) F1 + F2 + W B1

(iii) F B1 6

6 (a) (i) eye to image line perpendicular to mirror, by eye B1

object distance = image distance, by eye B1

(ii) normal correctly drawn, by eye B1

(iii) ray to bottom edge of mirror correct M1

reflected ray at correct angle to mirror, by eye (condone sloppy normal) A1

(b) sensible attempt at explanation B1

(c) (i) 2 (m) (NO ecf) B1

(ii) distance lady to mirror = 3 (m) C1

distance moved = 2 (m) (NO ecf) A1

away from mirror/wall B1 10

7 (a) (i) large, OR accept any large example e.g. cliff B1

(ii) speed = distance/time OR speed = 2xdistance/time C1 (in any form)

correct substitution C1

480 (m) c.a.o. A1

(b) speed = 6/50 OR 3/50 C1

0.12 (m/s) OR 0.06 (m/s) A1 6

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UCLES 2006

8 (a) (i) (group) 1 B1

(ii) (group) 2 B1

(iii) plastics OR glass OR ebonite B1

(b) top and bottom + B1

(c) region/area/space etc. B1

charge B1

experiences a force B1 7

9 (a) good straight line through first 5 points, drawn with a rule B1

(b) intelligent attempt at a reason B1

(c) 67 40 C1

27 (mm) A1

(d) 2.4 2.5 (N) B1 5

10 (a) less turns on Sy OR more turns on Py B1

(b) voltage OR p.d. OR volts is less B1

(c) V1/V2 = N1/N2 in any form C1

correct substitution C1

12 (V) A1

(d) voltage too high OR bell would be damaged B1 6

11 (a) 92 B1

(b) orbit OR outside nucleus B1

(c) 146 B1

(d) nucleus B1

(e) decreases M1

by 2 A1 6

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UCLES 2006

12 (a) reverse connections to ammeter or battery B1

(b) current OR amps OR amperes B1

(c) 4 components in series (ignore symbols) B1

4 recognisably correct symbols (ignore connections) B1

(d) (i) voltmeter OR multimeter on volts scale B1

(ii) voltmeter shown connected in parallel with resistor B1

(e) I = V/R in any form C1

correct substitution no ecf from wrong equation C1

0.4 (A) c.a.o. A1

(f) his value of (e) B1

(g) (i) 7.5 ticked B1

(ii) increases current e.c.f. B1 12

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0625 PHYSICS

0625/02 Paper 2 (Core Theory), maximum raw mark 80

This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners meeting before marking began.


Mark schemes must be read in conjunction with the question papers and the report on the examination.

CIE will not enter into discussions or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the May/June 2007 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

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UCLES 2007

NOTES ABOUT MARK SCHEME SYMBOLS B marks are independent marks, which do not depend on any other marks. For a B mark to be

scored, the point to which it refers must actually be seen in the candidate's answer. M marks are method marks upon which accuracy marks (A marks) later depend. For an M mark to

be scored, the point to which it refers must be seen in a candidate's answer. If a candidate fails to score a particular M mark, then none of the dependent A marks can be scored.

C marks are compensatory method marks which can be scored even if the points to which they refer

are not written down by the candidate, provided subsequent working gives evidence that they must have known it. e.g. if an equation carries a C mark and the candidate does not write down the actual equation but does correct working which shows he knew the equation, then the C mark is scored.

A marks are accuracy or answer marks which either depend on an M mark, or which are one of the

ways which allow a C mark to be scored. c.a.o. means "correct answer only". e.c.f. means "error carried forward". This indicates that if a candidate has made an earlier

mistake and has carried his incorrect value forward to subsequent stages of working, he may be given marks indicated by e.c.f. provided his subsequent working is correct, bearing in mind his earlier mistake. This prevents a candidate being penalised more than once for a particular mistake, but only applies to marks annotated "e.c.f."

e.e.o.o. means "each error or omission". brackets ( ) around words or units in the mark scheme are intended to indicate wording used to clarify

the mark scheme, but the marks do not depend on seeing the words or units in brackets. e.g. 10 (J) means that the mark is scored for 10, regardless of the unit given. underlining indicates that this must be seen in the answer offered, or something very similar. un.pen. means "unit penalty". An otherwise correct answer will have one mark deducted if the unit

is wrong or missing. This only applies where specifically stated in the mark scheme. Elsewhere, incorrect or missing units are condoned.


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UCLES 2007

TARGET MARK GRADE 1 (a) seconds hand at 35 s F B1 minutes hand at or just to R of 60 (up to division) C B1 (b) seconds hand at 55 s F B1 minutes hand between 4 and 5 C B1 (c) 4 minutes 20 s F B1

[Total: 5] 2 (a) speed = distance/time in any form OR 4800/12 F C1 400 (s) F A1 (b) straight line up to 12 m/s, 20s small square F B1 horizontal line for 400 s (e.c.f. for start point and from (a)) F B1 straight line down to 0 m/s at 500 s F B1 (c) distance = base x height OR area under graph OR equation of motion F C1 accel. distance = 120 m C A1 decel. distance = 480 m C A1 NOTE: NO MARKS for using (d) and then going back to (c) total distance = 120 + 4800 + 480 stated C A1 (d) average speed = total distance/total time OR 5400/500 OR 5400/920 F C1 10.8 (m/s) OR 11 (m/s) c.a.o. F A1

[Total: 11] 3 (a) (i) indication of force at A F M1 upward vertical force OR upward force at rt. angles to card C A1 (ii) largest distance from hinge F B1 (b) when C of M lies outside base (idea of) F C1 when vertical through C of M lies outside base (idea of) C A1 (c) (i) less than F B1 (ii) idea of C of M of box raised OR matchbox less stable C B1 NOT matchbox is taller [Total: 7]

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UCLES 2007

4 (a) (i) large (bird) F M1 (ii) greater weight/mass/force of gravity/heavier F A1 (b) greater F B1 the same F B1 (c) small (bird) F B1 (d) lost/turned into/decreased (accept turned into KE) F M1 as heat ignore mention of sound C A1

[Total: 7] 5 (a) solid: 2, 3 and 6 ticked -1 each error ( use + = 0 for extras) F, C B2 gas: 1, 4 and 5 ticked -1 each error ( use + = 0 for extras) F, C B2 (b) molecules breaking free (of surface) NOT turns into a gas F M1 mention of higher energy/faster/mols near surface C A1

[Total: 6] 6 (a) [mark in pairs, use + = 0] temp. decreasing F B1 volume increasing F B1 (b) (i) moved out/backwards/to the R F M1 (ii) idea of raised temp increases pressure, therefore move piston out to decrease pressure C A1

[Total: 4] 7 (a) (i) (good) conductor OR equiv. NOT conductor of electricity F B1 (ii) poor conductor OR (good) insulator (allow electrical) OR to stop your hand getting burned/prevent shock F B1 (b) (i) conduction F B1 (ii) any 2 of conduction, convection, radiation ticked F, C B1+B1 (-1 if evaporation ticked) (c) equal to 40W C B1 [Total: 6]

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UCLES 2007

8 (a) 50 F B1 (b) his (a) x 4 F C1 200 (Hz) e.c.f. F A1 (c) Yes, because it is between 20 20,000 Hz or more than 20 Hz C B1 allow e.c.f. from (b) answer must tally with (b) [Total: 4] 9 (a) (i) series OR potential divider F B1 (ii) 12 () F B1 (iii) I = V/R in any form F C1 6/his (ii) F C1 0.5 e.c.f. F A1 A OR amp(s) OR ampere(s) OR a F B1 (iv) his (iii) x 10 F C1 5 (V) e.c.f. F A1 (v) his (iv) C B1 (b) (i) 1. 6 (V) C B1 2. 0 (V) C B1 (ii) C or clear mark positioned below A but not lower than bottom of C B1 the word contact allow e.c.f. only if 6 and 0 in (i) are reversed [Total: 12] 10 (a) connect wire across/to millivoltmeter F B1 (any mention of connecting to electricity/battery gets B0 here) move wire across magnetic field OR move magnet past wire OR dip magnet into coil made of the wire (condone connect to battery/electricity here) F B1 (b) millivoltmeter deflects F B1 (c) generator OR transformer OR induction coil OR coil on a car OR microphone NOT relay/motor/power station etc F B1 [Total: 4]

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UCLES 2007

11 (a) dot to right of S: horiz. line from end/pole, to right (must not curve) F B1 dot to left of N: horiz. line from end/pole, to left (must not curve) F B1 dot by top LH corner: smooth curve from end/pole, above magnet, to equivalent point at south end F B1 dot below magnet: smooth curve between N and S F M1 curve leaving & entering side of magnet, not ends C A1 (b) arrow clearly indicating N to S F B1 [Total: 6] 12 (a) (i) 2, 2, 0 (accept blank for 0) F B1 (ii) 0, 0, 1 (accept blank for 0) F B1 (b) protons: 11 F B1 neutrons: 13 C B1 electrons: same as his protons F B1 (c) (i) 0 C B1 (ii) -1 C B1 (iii) OR electron OR e OR B OR beta C B1 NOT b [Total: 8]

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MARK SCHEME for the October/November 2007 question paper

0625 PHYSICS 0625/02 Paper 2 (Core Theory), maximum raw mark 80




CIE will not enter into discussions or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the October/November 2007 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

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IGCSE October/November 2007 0625 02

UCLES 2007

NOTES ABOUT MARK SCHEME SYMBOLS B marks are independent marks, which do not depend on any other marks. For a B mark to be

scored, the point to which it refers must actually be seen in the candidate's answer. M marks are method marks upon which accuracy marks (A marks) later depend. For an M mark

to be scored, the point to which it refers must be seen in a candidate's answer. If a candidate fails to score a particular M mark, then none of the dependent A marks can be scored.

C marks are compensatory method marks which can be scored even if the points to which they

refer are not written down by the candidate, provided subsequent working gives evidence that they must have known it. e.g. if an equation carries a C mark and the candidate does not write down the actual equation but does correct working which shows he knew the equation, then the C mark is scored.

A marks are accuracy or answer marks which either depend on an M mark, or which are one of

the ways which allow a C mark to be scored. c.a.o. means "correct answer only". e.c.f. means "error carried forward". This indicates that if a candidate has made an earlier

mistake and has carried his incorrect value forward to subsequent stages of working, he may be given marks indicated by e.c.f. provided his subsequent working is correct, bearing in mind his earlier mistake. This prevents a candidate being penalised more than once for a particular mistake, but only applies to marks annotated "e.c.f."

e.e.o.o. means "each error or omission". brackets ( ) around words or units in the mark scheme are intended to indicate wording used to

clarify the mark scheme, but the marks do not depend on seeing the words or units in brackets. e.g. 10 (J) means that the mark is scored for 10, regardless of the unit given.

underlining indicates that this must be seen in the answer offered, or something very similar. un.pen. means "unit penalty". An otherwise correct answer will have one mark deducted if the

unit is wrong or missing. This only applies where specifically stated in the mark scheme. Elsewhere, incorrect or missing units are condoned.


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UCLES 2007

QU. SCHEME MARK 1 (a) 60 (cm3) B1 (b) liquid surface lower than in cylinder C1 liquid surface level with 15 cm3 ( 5 cm3) A1 (c) less B1 [Total: 4] 2 (a) 200,000 (m3) B1 (b) D = M/V in any form B1 his (a) x 1.3 C1 260,000 c.a.o. A1 kg B1 (c) decreases M1 air expands OR density decreases A1 (d) hot air rises B1 [Total: 8] 3 (a) 7.5 (cmHg) C1 75 (cmHg) A1 (give C1, A1 for 1.0006 x 105 Pa or 1 x 105 Pa (N/m2) if unit given) (b) nothing OR (Torricellian) vacuum OR Hg vapour B1 (c) tube level lower B1 reservoir level higher (any amount) B1 (d) pressures on 2 surfaces equal (always) ) Hg levels equal (always) OR no Hg column ) any two B1+B1 no change when pressure changes ) [Total: 7]

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UCLES 2007

QU. SCHEME MARK 4 (a) (i) arrow labelled W, vertically (by eye) down from somewhere on either boat B1 (ii) arrow labelled F, down slope, between either boat and slipway B1 (b) (i) multiply W by (vertical) height raised OR Wh B1 (ii) multiply F by distance along slope OR Fs B1 (iii) add (i) and (ii) B1 (c) time taken B1 [Total: 6] 5 (a) oC B1 (b) (i) ICE marked at 0 B1 (ii) STEAM marked at 100 B1 (c) expansion/volume/pressure OF a gas )

expansion/length OF a solid ) resistance OF a resistor/thermistor/wire ) bending OF a bimetal strip ) any 2 B1+B1 e.m.f/voltage OF a thermocouple ) colour OF a hot surface ) colour change OF certain chemicals )

[Total: 5] 6 (a) (i) uniform acceleration B1 (ii) 9 (m/s) B1 (iii) s = vt in any form C1 90 (m) OR 10 x his (ii), evaluated A1 (b) average speed is lower B1 [Total: 5]

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UCLES 2007

QU. SCHEME MARK

7 (a) (i) 1.5 (cm) B1

(ii) circle centred on X, outside printed circle (circle need not be drawn with a compass, but must be carefully drawn) M1

diameter 4.5 cm by eye A1

(b) sound longitudinal, water transverse ) sound wave faster (than water wave) ) any 2 B1,B1 different frequency/wavelength )

[Total: 5]

8 (a) (i) principal focus unambiguously marked B1 focal length approximately indicated C1 focal length precisely indicated, from pole to principal focus A1

(ii) any ray from X to Y, correctly refracted at lens B1

(b) [mark in pairs, using + = 0] real B1 diminished B1 inverted B1 image distance less B1

(c) gets smaller B1 gets closer to lens B1

[Total: 10]

9 (a) points correctly plotted ( small square) 1 e.e.o.o. B2 smooth curve through his points B1 reasonable thickness B1

(b) (i) 5.3 6.1 B1

(ii) 0.9 1.7 B1

(c) R = V/I in any form C1 division by 25 or 25 x 103 somewhere C1

(i) answer between 220 and 240 B1 (ii) answer between 40 and 60 B1 shown in either (i) or (ii) B1

(d) answer compatible with his (c) B1

[Total: 12]

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UCLES 2007

QU. SCHEME MARK 10 (a) (i) shape appropriate outside coil (condone incomplete loops) M1

lines mostly parallel within coil A1 pattern roughly symmetrical A1 no lines touching or crossing A1

(ii) iron bar B1 (b) rods become magnetised M1 same direction A1 repel B1 [Total: 8] 11 (a) within range 1820 (mins) B1 (b) (i) 922 or thereabouts B1 (ii) his (a) B1 (c) alpha OR beta B1 [Total: 4] 12 (a) electrons B1 (b) move M1 towards P1 A1 (c) idea of making both P3 and/or P4 positive B1 equal potential B1 (earthing of P1 and P2 not required for answer) (d) fluorescent screen OR any other appropriate method B1 [Total: 6]

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0625 PHYSICS 0625/02 Paper 2 (Core Theory), maximum raw mark 80




CIE will not enter into discussions or correspondence in connection with these mark schemes. CIE is publishing the mark schemes for the May/June 2008 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

9Dwebsite.tk




UCLES 2008

NOTES ABOUT MARK SCHEME SYMBOLS AND OTHER MATTERS

B marks are independent marks, which do not depend on any other marks. For a B mark to be scored, the point to which it refers must actually be seen in the candidates answer.


NOTE: In this paper, note the M marks in Questions 1, 3 and 12.


A marks are accuracy or answer marks which either depend on an M mark, or which are one of the ways which allow a C mark to be scored.

c.a.o. means "correct answer only".

e.c.f. means "error carried forward". This indicates that if a candidate has made an earlier mistake and has carried his incorrect value f

november 2001 international gcse -...

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