MODUL SCIENCE FORM 2

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 Pain receptor

Epidermis Sweat gland

Cold receptor

Hair

Touch receptor

Fat layer

Dermis

Pressure receptor

a

b c d e

f g h i

j

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NOSE 2. Label the part of the human nose with the following words. 1.Nostril

2.Nasal Cavity

3.Receptor Cell A

B C

3. (a) State the stimulatory reaction in the nose using the words given below :

Brain

Analysis

Smell

Response

Smell receptor

1

4

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Dissolved in mucus

Impulse

3

Impulse

2

3(b) Match the different parts in the nose their function

i

ii

Smell Mucus

iii

Receptor s

iv

Brain

v

A B

Smell is good/bad

Analyses messages and gives the appropriate response C D

Chemicals in the air stimulate the nose Dissolve the chemicals in the air

Detection E

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Send messages to the brain about stimulus

TONGUE 4. Label each part P, Q, R and S using the following words.

Sweet

Sour

Bitter

Salty

PP

Q

R

S

(i) (ii)

The tongue is covered with many tiny structures called the ____________ The taste buds are able to detect the taste of the food if the food can dissolve in ______________

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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

Oval windows

Eardrum

Semicircular canal

Ossicles cochlea

Eustachian tube

A

H

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B

C

G

D

F

E

6. Match the different parts in the ear to their functions

Balance the air pressure on both sides of the eardrum

Eardrum

P

I

Ossicles

Q

II

Auditory nerve

Cochlea

Oval window

R

III

It vibrates at the same frequency as the sound waves and transfer vibration to the ossicle

Detect the vibration and converts them into nerve impulse

S

Collect and directs sound waves IV (vibrating air) into the auditory canal

T

V

Send the messages to the brain

ows Eustachian tube

Pinna

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U

VI

Transfers the vibration from the ossicles to the cochlea

V

VII

Amplified the vibration and transfer vibrations to the ossicles

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

Pupil

Retina

Lens

T:

S:

P:

R:

Q:

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9.

Draw lines to show the correct match between the structures and their functions.

PART

FUNCTION

P

i. Controls amount of light entering the eye

Q

ii. Helps to focus the light on the retina

R

iii. Focuses the light to form an image on the retina

S

iv. Controls the size of the pupil

T

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.

Cornea Pupil

Iris

Retina

Lens

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

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2.2 NUTRITION HUMAN DIGESTIVE SYSTEM

1. Label the parts of the human digestive system in the following words.

Liver

Small intestine

Oesophagus

Gall bladder Pancreas

Stomach

Mouth

Large intestine

Salivary glands

A B C

E D F G

H I

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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

C

i Produces bile

E

ii Channels food to the stomach. This action is called peristalsis

D

iii Produces digestive enzymes such as amylase, protease and lipase

G

iv

v

I

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Digestion of fat, protein and starch and absorption of food

Digestion of protein begins

HUMAN DIGESTIVE SYSTEM

3. Fill in the blanks with suitable words in the box.

Fatty acids and glycerol, salivary amylase, liver, glucose, protease, gall bladder, amino acids, dilute hydrochloric acid,

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? _______________________

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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

Fish, Monocotyledons, Amphibians, Mosses, Non-flowering, Dicotyledons, Fern, Algae, Mammals. Birds, Reptiles, Amphibians ,Birds, Reptiles, Mammals,

a) Plants

Flowering

ii

i

iii

iv

v

Fungi MODUL 2 FORM 2 STF 2007

vi

b) Vertebrates

i

ii

iii

iv

Fish

c) Vertebrates

Warm-blooded

i

Cold-blooded

ii

iii

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iv

v

CLASSIFICATION 2. Based on your observation state one characteristic of each organism.

a

c

b

d

b

b

e

f

g

h

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j i

i

j i

k i

m i

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l i

n

O

P

i

i

3. Classify the organisms into two groups based on their common characreristics

P

Q

Common characteristics

aa a

Letter of The organisms

i

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R

S

b

ii

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 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

DICOTYLEDONS

P

Q

R

S

T

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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

A group of similar living organisms

Habitat

A

i

Species

B

ii

Made up of living and non-living components

iii

Different communities interact with with one another and their environment in a habitat

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.

Population C

Community D

Environment E

vii Ecosystem

F

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Made up of different populations of organisms living together and interacting with one another in the same habitat

FOOD WEB

6.

Fill in the blanks using the words from the following list

Food Chain, Producer, Consumer, Decomposer, Food web, Pyramid of Number

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.

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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.

carbon dioxide , oxygen water , glucose , sunlight, chlorophyll 8. Write the word equation for photosynthesis.

a

b +

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c d

e

f +

2.4 WATER AND SOLUTION Physical characteristics of water 1.

Diagram 1 shows the changes in the state of water.

Q:

P:

R:

S:

T:

Diagram 1 On diagram 1, label P, Q, R, S and T using the following words.

Freezing

Liquid

Solid

Boiling

Gas

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.

solid 7

( c ) Steam is water in the ……………………. state.

liquid

( d ) We drink water in the ………………….. state.

three

(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

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colourless freezes 1 gas

The composition of water 2. Diagram 2 shows the electrolysis of water.

……………….. gas is discharged

On ……………… gas is discharged

……………… + dilute …………. ………………

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.

Diagram 2 On diagram 2, fill in the blanks using the following words.

Cathode

Anode

Hydrogen

water

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Oxygen

Sulphuric acid

positive

negative

Solution and Solubility 3. Diagram 3 shows the process of making a solution.

x

z y

Diagram 3

Solute

Solvent

Solution

On diagram 3 , label the substances using the following words. 4. Diagram 4 shows the making of a cup of hot coffee.

sugar Black coffee

Hot water

Hot coffee

Diagram 4 Based on diagram 4, determine the solute , solvent and solution in the hot coffee. a. Solute : …………………………… b. Solvent : …………………………… c. Solution: ……………………………

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5. Diagram 5 shows three beakers containing solutions and their types .

SATURATED SOLUTION P

DILUTE SOLUTION Q

CONCENTRATED SOLUTION Diagram 5

R

Draw lines to show the correct match between the solution in the beakers and their types.

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Methods of water purification 6.

Diagram 6 shows methods of purification.

d a

e

b

c

……………………………

…………………………………… Diagram 6

On figure 6, name the method and label the apparatus used for each picture using the following words.

Filter funnel

Thermometer

Distillation

Round bottom flask

Filtration

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Measuring cylinder Conical flask

2.5 SIMPLE MACHINE 1. Diagram 1 shows a first class lever. Label J, K and L using the following words:

Effort

Fulcrum

Load

J: K:

L:

Diagram 1

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2. Diagram 2 shows a second class lever. Label P, Q and R using the following words:

Effort

Fulcrum

Load

P:

Q:

R: Wheelbarrow

Diagram 2

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3. Diagram 3 shows a third class lever. Label X, Y and Z using the following words:

Effort

Fulcrum

Load

Z: Ice tongs X:

Y:

Diagram 3

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4. Draw lines to show the correct match between the classes of levers and the simple machines.

SIMPLE MACHINE

CLASS OF LEVER

X First class stapler

Y Second class scissors

Z Third class nutcracker

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5. Fill in the blanks using words given in the box.

first

second

third

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.

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MODUL 2 FORM 2 STF 2007