MODUL SCIENCE FORM 2

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


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


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


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


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


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


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 : _____________________________________

__________________________________________


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:


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


10. State the function of the following stuctures: Cornea ……………………………………………………………………………… Iris ……………………………………………………………………………… Pupil ……………………………………………………………………………… Retina ……………………………………………………………………………… Lens ………………………………………………………………………………


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


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



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



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,


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,


b)

c)

Vertebrates

i ii

Fish iii iv

Vertebrates

Warm-blooded Cold-blooded

i

iv v iii

ii


CLASSIFICATION

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

a b

c b

b

d

e f

g h


i j i

k i

l i

m i

j i

n


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


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


MONOCOTYLEDONS

A

B

C

D

E


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


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


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__


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


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


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 ………….

………………


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


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


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


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:


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


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


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


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

MODUL SCIENCE FORM 2

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