grade 8 science - saisd.net filefor middle school science assessments

15
STUDENT NAME ___________________________ DATE ___________ ID ____________ GRADE 8 SCIENCE Administered October 2007 © 2004 TEA

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STUDENT NAME ___________________________ DATE ___________ ID ____________

GRADE 8 SCIENCE

Administered October 2007

© 2004 TEA

Work = force × distance

Speed =

Force = mass × acceleration

Weight = mass × acceleration due to gravity

Density = mass

volume

distancetime

FORMULA CHART

W = Fd

s =

F = ma

Weight = mg

D =mv

dt

Constants/Conversions

g = acceleration due to gravity = 9.8

speed of light = 3 × 10 8

speed of sound = 343 at sea level and 20°C

1 cm 3 = 1 mL

ms

ms

ms 2

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8th Grade Science Interim Assessment (1)

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Gr8 M-R-SCI-SS Rel 7/28/06 12:29 PM Page 66

Page 2

8th Grade Science Interim Assessment (1)

8th Grade Science Interim Assessment (1)

Which of the following would be best to use tomeasure the mass of a mineral sample?

A Meterstick

B Graduated cylinder

C Balance

D Hand lens

DIRECTIONSRead each question and choose the best answer. Then fill in the correct answer.

SAMPLE A

Gr8 M-R-SCI-SS Rel 7/28/06 12:29 PM Page 68

Page 3 8th Grade Science Interim Assessment (1)

The graph above shows the motion of a model train. What was the average speed of the train inmeters/second between points B and C? Record and bubble in your answer to the nearest tenth on theanswer grid below.

Motion of a Model Train

Dis

tanc

e(m

eter

s)

Time(seconds)

17

0 1 2 3 4 5 6 7 8 9 10 11 12

123456789

10111213141516 C

D

J

FG

E

H I

B

A

SAMPLE B

Gr8 M-R-SCI-SS Rel 7/28/06 12:29 PM Page 69

Page 4 8th Grade Science Interim Assessment (1)

Page 5

1 A teacher mixes two clear liquids in a beaker. White solid particles form in the beaker and settle to the bottom. If a chemical change took place in the beaker, which of the following best describes the white sold particles?

A An atom not present in the original liquids

B A substance with different properties than the original liquids

C A solid dissolved in one of the two original liquids

D An element not present in the original

2 Based on the periodic table, which of the following elements has physical properties most like fluorine (F)?

F Calcium (Ca)

G Oxygen (O)

H Chlorine (Cl)

J Argon (Ar)

3 Maintaining moisture content is one aspect of keeping food fresh. Which of these experimental designs would be best to use to determine whether plastic sandwich bags help keep food fresh?

A 25 of eachEmpty

bagSandwich

in bag

B 25 of eachUncovered

sandwichUncovered

bread

C

D

8th Grade Science Interim Assessment (1)

liquids

Page 6

Atomic number

01 5 10 15

5

10

15

20

25

30

35

H

Li

F

Mg

Cl

4 According to the graph above, what prediction can be made about the relationship between an

atom's atomic number and atomic mass?

F As atomic number increases, atomic mass increases.

G As atomic number increases, atomic mass decreases.

H As atomic number decreases, atomic mass increases.

J There is an opposite relationship between the two.

5 In the chemical equation below, how many carbon atoms are present in the product?

A 1 B 2

C 3

D 4

6 A workman needs to get to the top of a two story building to fix an air conditioning unit. To get to the top of the building the workman can either climb a ladder or walk up stairs. The workman would choose —

F the ladder because it takes less force and less distance

G the stairs because it takes more force but less distance

H the ladder because it takes more force and more distance

J the stairs because it takes less force but more distance

8th Grade Science Interim Assessment (1)

Page 7

7 Which graph shows an object slowing down?

A

Time (sec)

Spe

ed (

m/s

ec)

C

Time (sec)

Spe

ed (

m/s

ec)

B

Time (sec)

Spe

ed (

m/s

ec)

D

Time (sec)

Spe

ed (

m/s

ec)

Substance Mass (grams)

Specific Heat J/kg 0C

Aluminum Can 50g 899

Glass Jar 50g 837

Iron Skillet 50g 448

Copper Wire 50g 387

8 Based on your knowledge of specific heat and the information in the chart above, which of the following substances will take the longest to heat up?

F Aluminum can

G Glass jar

H Iron skillet

J Copper wire

8th Grade Science Interim Assessment (1)

Page 8

9 The diagram below represents a diver’s motion from the top of a high diving board into a pool of water

At which labeled point does the diver has the most kinetic energy? A 1

B 2

C 3

D 4

8th Grade Science Interim Assessment (1)

Page 9

A 0.89 g/cm3

B 1.00 g/cm3

C 1.21 g/cm3

D 2.34 g/cm3

10 The diagram above shows a tall beaker with four different liquids and their densities. If a ball that has a density of 1.73 g/cm3 is placed in the beaker, where will the ball come to rest?

F On top of liquid A

G Between liquids B and C

H Between liquids C and D

J On the bottom of the beaker

© Texas Education Agency

11 The chart above shows the results of placing a 100 mL beaker of water in a freezer and recording

the temperature of the water every five minutes. Which of these is the most likely reason the temperature remained at 00C for ten minutes?

A The water molecules were gaining energy.

B The density of the water was increasing.

C The water was changing phase from a liquid to a solid.

D The friction of water against glass helped maintain the temperature.

Exposing Water to Freezing Temperatures

Time (min) Temperature

(0C)

0 22 5 15 10 10 15 6 20 3 25 0 30 0 35 0

8th Grade Science Interim Assessment (1)

Page 10

Velocity (m/s)

12 The graph above represents a car's motion. What conclusion can be made based on this graph?

F The car is accelerating.

G The car is going slowly uphill.

H The car is decelerating.

J The car's velocity is constant.

13 This model shows the forces applied when two students push on a box. A limitation this model has is that it does not show —

A the forces acting in opposite directions

B the actual amount of force

C that student B is pushing harder

D that the forces are unequal

8th Grade Science Interim Assessment (1)

Page 11

14 According to the periodic table, which of the following models best represents an atom of the element carbon (C)?

ProtonNeutronElectron

J

ProtonNeutronElectronH

ProtonNeutronElectronG

ProtonNeutronElectronF

8th Grade Science Interim Assessment (1)

15 What can you tell about the forces acting on the marble above as it accelerates down

A The forces are increasing.

B The forces are decreasing.

C The forces are balanced.

D The forces are unbalanced.

16 Scientists are preparing to launch a satellite into outer space. Which type of wave will the scientists be able to use to communicate with the satellite?

F Radio waves

G Sound waves

H Sonar

J Electricity

8th Grade Science Interim Assessment (1)

the ramp?

Page 12

Page 13

17 The pans in this balance are at the same height. According to this information, what is the mass

of the rock sample? Record and bubble in your answer.

8th Grade Science Interim Assessment (1)