modul science form 2
TRANSCRIPT
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MODUL 2 FORM 2 STF 2007
MODUL FORM 2
2.1 THE WORLD THROUGH OUR SENSES SKIN 1. Label each part of the skin with a suitable word from the following list.
Heat receptor Epidermis Cold receptor Hair Fat layer Dermis
Pain receptor Sweat gland Touch receptor Pressure receptor
e
b
h
g
c
d
f
j
a
i
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NOSE
2. Label the part of the human nose with the following words.
B
C
3. (a) State the stimulatory reaction in the nose using the words given below :
1.Nostril 2.Nasal Cavity 3.Receptor Cell
Smell Smell receptor Impulse
Impulse
Brain Analysis Dissolved in mucus Response
1
2 3 4
A
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3(b) Match the different parts in the nose their function
i
ii
iii
iv
v
Smell
Mucus
Receptor
s
Brain
Detection
A Smell is good/bad
B Analyses messages and gives the appropriate response
C Chemicals in the air stimulate the nose
D Dissolve the chemicals in the air
E Send messages to the brain about stimulus
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TONGUE
4. Label each part P, Q, R and S using the following words.
P
(i) The tongue is covered with many tiny structures called the ____________ (ii) The taste buds are able to detect the taste of the food if the food can
dissolve in ______________
Q
R
S
P
Sweet Sour Bitter Salty
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HUMAN EAR
5. The diagram below shows the cross section of a human ear. Label the t parts using the
word given in the box.
Pinna Ear canal Eardrum Ossicles
Oval windows Semicircular canal cochlea
Eustachian tube
A B C
E H G F
D
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6. Match the different parts in the ear to their functions
Eardrum Balance the air pressure on both sides
of the eardrum
Pinna
Ossicles
Cochlea
Eustachian tube
Oval window
ows
Auditory nerve
Transfers the vibration from the
ossicles to the cochlea
Detect the vibration and converts
them into nerve impulse
Send the messages to the brain
Collect and directs sound waves
(vibrating air) into the auditory canal
It vibrates at the same frequency as
the sound waves and transfer
vibration to the ossicle
Amplified the vibration and transfer
vibrations to the ossicles
P
Q
R
S
T
U
V
I
II
III
IV
V
VI
VII
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7. State the functions of these structures in the ear
(a) Eardrum : ___________________________________________ ___________________________________________ (b) Ossicles : ___________________________________________ ___________________________________________ (c) Pinna : ___________________________________________ ___________________________________________ (d) Cochlea : ___________________________________________ ___________________________________________ (e) Eustachian tube : ________________________________ ___________________________________________ (f) Auditory nerve : _____________________________________ __________________________________________ (g) Oval window : _____________________________________
__________________________________________
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EYE
8. The diagram shows the human eye. Label structures P, Q, R, S and T using the following words:
Cornea Iris Retina Pupil Lens
P:
T:
Q:
R:
S:
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9. Draw lines to show the correct match between the structures and their functions.
PART FUNCTION
P
S
Q
R
T
i. Controls amount of light entering the eye
ii. Helps to focus the light on the retina
iii. Focuses the light to form an image on the retina
iv. Controls the size of the pupil
v. Receives light stimuli and changes the stimuli to nerve impulses
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10. State the function of the following stuctures: Cornea ……………………………………………………………………………… Iris ……………………………………………………………………………… Pupil ……………………………………………………………………………… Retina ……………………………………………………………………………… Lens ………………………………………………………………………………
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11. Fill in the blank using words given in the box. 1 The ………………………… receives light stimuli and changes the stimuli
to nerve impulses 2 The …………………………. helps to focus the light on to the retina 3 The …………………………. focuses the light to form an image on the
retina. 4 The …………………………. controls the size of the pupil 5 The ………………………….controls amount of light entering the eye
Cornea Iris Retina Pupil Lens
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2.2 NUTRITION
HUMAN DIGESTIVE SYSTEM
1. Label the parts of the human digestive system in the following words.
E
B
F
I
H
G
D
C
A
Liver Small intestine Gall bladder Pancreas Large intestine Oesophagus Stomach Mouth Salivary glands
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HUMAN DIGESTIVE SYSTEM
2. Draw lines to show the correct match between the structures and their functions Draw the lines as shown below
D
E
G
I
iii Produces digestive enzymes such as amylase, protease and lipase
ii Channels food to the stomach. This action is called peristalsis
C
i Produces bile
iv Digestion of fat, protein and starch and absorption of food
v Digestion of protein begins
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HUMAN DIGESTIVE SYSTEM
3. Fill in the blanks with suitable words in the box.
1. The enzyme in saliva, _____________________ breaks down the starch
molecules into maltose 2. The stomach secretes gastric juice which contains _______________ and
_________________ digestion of proteins 3. Bile is produced by __________________ and kept in the ___________ 4. What are the end products of digestion of a) Carbohydrates ? __________________ b) Proteins? ________________________ c) Fats? _______________________
Fatty acids and glycerol, salivary amylase, liver, glucose,
protease, gall bladder, amino acids, dilute hydrochloric acid,
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2.3 INTERDEPENDENCE AMONG LIVING ORGANISMS IN THE ENVIRONMENT
CLASSIFICATION OF ANIMALS AND PLANTS
1. Fill in the blanks using the words given a)
Plants
Flowering i
ii
v vi iv
iii
Fungi
Fish, Monocotyledons, Amphibians, Mosses, Non-flowering, Dicotyledons, Fern, Algae, Mammals. Birds, Reptiles, Amphibians ,Birds, Reptiles, Mammals,
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b)
c)
Vertebrates
i ii
Fish iii iv
Vertebrates
Warm-blooded Cold-blooded
i
iv v iii
ii
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CLASSIFICATION
2. Based on your observation state one characteristic of each organism.
a b
c b
b
d
e f
g h
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i j i
k i
l i
m i
j i
n
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3. Classify the organisms into two groups based on their common characreristics
P Q R S
Common aa
characteristics
Letter of
The organisms
O i
P i
a b
i ii
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CLASSIFICATION OF PLANTS
4. The diagram shows the flowering plants. Label structure P, Q, R, S, T, U, A, B, C, D and E using the following words
P
Q
R
S
T
DICOTYLEDONS
fibrous root, tap root, one cotyledon, two cotyledons, network of veins, parallel veins, soft and non woody, hard and woody,
flower parts in threes, flower parts in fours or fives
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MONOCOTYLEDONS
A
B
C
D
E
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5. Draw lines to show the correct match between the phrase and
explanation on Interdependence among living organism.
Draw the lines as shown below
PHRASE EXPLANATION
Population C
Species B
Community D
Environment E
iii Different communities interact with with one another and their environment in a habitat
ii Made up of living and non-living components
Habitat A
i A group of similar living organisms
iv The natural home of an organism where it lives and reproduces
v A group of individuals of the same species that live and reproduce in a habitat at the same time.
Ecosystem F
vii Made up of different populations of organisms living together and interacting with one another in the same habitat
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FOOD WEB
6. Fill in the blanks using the words from the following list
1 ____________________ are living organisms that are able to make their own food
2 ____________________ are living organisms that are not able to make
their own food 3 ____________________ are living organisms that feed on the remains of
dead organisms
4 ____________________ is a network of interconnected food chains
5 ____________________ shows the food relationship among living
organisms 6 _____________________ shows the different number of organisms in a food chain.
Food Chain, Producer, Consumer, Decomposer,
Food web, Pyramid of Number
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TYPES OF INTERACTIONS BETWEEN LIVING ORGANISMS
7 Use letters to complete the phrase on types of interaction between living organisms
C__ MM__NS__LISM
P__ RA__ITI_M
CO__P___TI __IO__
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PHOTOSYNTHESIS Photosynthesis is the process in which green plants use light to produce food. 8. Write the word equation for photosynthesis. c + d +
carbon dioxide , oxygen
water , glucose ,
sunlight, chlorophyll
a
b
f e
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2.4 WATER AND SOLUTION Physical characteristics of water 1. Diagram 1 shows the changes in the state of water.
Diagram 1 On diagram 1, label P, Q, R, S and T using the following words. Fill in the blank using the word from the box given. ( a ) Water can exist in …………………………… states. ( b ) An ice cube is water in the ………………… state. ( c ) Steam is water in the ……………………. state. ( d ) We drink water in the ………………….. state. (e ) Liquid water …………………. to form ice. ( f ) Water is …………………. tasteless and neutral. ( g ) The pH value of pure water is …………… ( h ) The density of water is ……………… g/cm3
Freezing Liquid Solid Boiling Gas
R: S: T:
P: Q:
solid
7
liquid
three
colourless
freezes
1
gas
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The composition of water 2. Diagram 2 shows the electrolysis of water. On
Diagram 2 On diagram 2, fill in the blanks using the following words.
Cathode Hydrogen Oxygen positive
Anode water Sulphuric acid negative
The…………
is the electrode
that is
connected
to the…………
terminal of a
battery.
The …………..
is the electrode
that is
connected to
the……………
terminal of a
battery
………………..
gas is discharged ………………
gas is discharged
………………
+ dilute ………….
………………
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Solution and Solubility 3. Diagram 3 shows the process of making a solution.
Diagram 3 On diagram 3 , label the substances using the following words. 4. Diagram 4 shows the making of a cup of hot coffee.
Hot water Diagram 4 Based on diagram 4, determine the solute , solvent and solution in the hot coffee. a. Solute : …………………………… b. Solvent : …………………………… c. Solution: ……………………………
x
y
z
Solute Solvent Solution
Hot coffee
sugar
Black coffee
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5. Diagram 5 shows three beakers containing solutions and their types . P Q
Diagram 5 R
Draw lines to show the correct match between the solution in the beakers and their types.
SATURATED SOLUTION
DILUTE SOLUTION
CONCENTRATED
SOLUTION
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Methods of water purification 6. Diagram 6 shows methods of purification. …………………………… ……………………………………
Diagram 6 On figure 6, name the method and label the apparatus used for each picture using the following words.
Filter funnel Thermometer Measuring cylinder
Distillation Round bottom flask Conical flask
Filtration
a
b
d
e
c
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2.5 SIMPLE MACHINE
1. Diagram 1 shows a first class lever. Label J, K and L using the following words:
Diagram 1
Effort Fulcrum Load
K:
J:
L:
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2. Diagram 2 shows a second class lever. Label P, Q and R using the following words:
Diagram 2
Effort Fulcrum Load
P:
Q:
R: Wheelbarrow
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3. Diagram 3 shows a third class lever. Label X, Y and Z using the following words:
Diagram 3
Effort Fulcrum Load
X:
Z:
Y:
Ice tongs
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4. Draw lines to show the correct match between the classes of levers and the simple machines.
CLASS OF LEVER SIMPLE MACHINE
First class
Second class
Third class
stapler
scissors
nutcracker
X
Y
Z
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5. Fill in the blanks using words given in the box. 1 A stapler is an example of the ………………………………class lever. 2 A scissors is an example of the …………………………….class lever. 3 A nutcracker is an example of the ………………………….class lever. 4 A wheelbarrow is an example of the ……………………….class lever. 5 An ice tongs is an example of the …………………………class lever.
first second third
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