50265534 Modul Science Form 2

8/9/2019 50265534 Modul Science Form 2

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MODUL 2 FORM 2 STF 2007

MODUL FORM 2

2.1 THE WORLD THROUGH OUR SENSESSKIN

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

234

A


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

i

ii

iii

iv

v

Smell

Mucus

Receptor

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 theword given in the box.

Pinna Ear canal Eardrum Ossicles

Oval windows Semicircular canal cochlea

Eustachian tube

A B C

EH 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 sidesof the eardrum

Pinna

Ossicles

Cochlea

Eustachian tube

Oval window

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

Amplified the vibration and transfer

vibrations to the ossicles

Q

S

U

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 structuresand 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 tonerve 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 theretina.

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

functionsDraw the lines as shown below

D

E

G

I

iii Produces digestive enzymes such asamylase, 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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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 ORGANISMSIN THE ENVIRONMENT

CLASSIFICATION OF ANIMALS AND PLANTS

1. Fill in the blanks using the words given

a)Plants

Flowering i

ii

v viiv

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 iiFish

iii iv

Vertebrates

Warm-blooded Cold-blooded

i

iv viii

ii


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CLASSIFICATION

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

a b

c

d

e f

g h


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i j

k

l

m

j

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 ofThe organisms

O

P

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 ofveins, 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 andexplanation 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 oneanother and their environment in a habitat

ii Made up of living and non-living components

Habitat Ai A group of similar living organisms

iv The natural home of an organism where itlives and reproduces

v A group of individuals of the same speciesthat live and reproduce in a habitat at thesame time.

Ecosystem Fvii Made up of different populations of organisms

living together and interacting with oneanother 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 theirown food

2 ____________________ are living organisms that are not able to maketheir own food

3 ____________________ are living organisms that feed on the remains ofdead organisms

4 ____________________ is a network of interconnected food chains

5 ____________________ shows the food relationship among living

organisms

6 _____________________ shows the different number of organisms ina 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 fe


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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

freezes1

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 electrod

that is

connected

to the…………

terminal of a

battery.

The …………..

is the electrode

that is

connected tothe……………

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.

Hotwater

Diagram 4

Based on diagram 4, determine the solute , solvent and solution in the hot coffee.

a. Solute : ……………………………

b. Solvent : ……………………………

c. Solution: ……………………………

x

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 theirtypes.

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 thefollowing 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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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 thesimple 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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50265534 Modul Science Form 2

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