MODULE 08(THE WORLD THROUGH OUR SENSES)

8/7/2019 MODULE 08(THE WORLD THROUGH OUR SENSES)

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MODULE 8: THE WORLD THROUGH OUR SENSES

SECTION A

1. The part of the tongue in Figure 1 that is the least sensitive to taste is labelled

A

B

C

D

Figure 1

2. Sensitive skin has

I. a thinner epidermis

II. more receptors

III. more fat under the dermis

A I, II and III

B I and II only

C II and III only

D I only

3. Which part of the nose in Figure 2 has smell receptors?

Figure 2



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4. Food is less tasty if a person

A. is constipated.

B. catches a cold.

C. has beri-beri.

D. has anaemia.

5. Which sensory organ detects chemical stimuli?

A. The eyes and the ears

B. The nose and the tongue

C. The eyes and the tongue

D. The ears and the nose

6. Which part of the eye in Figure 3 does not help focus light on the retina?

Figure 3

7. Which of the following pairs of structure and function is correct?

Structure of ear FunctionA Auditory nerve Controls the balance of the bodyB Ossicles Amplify sound vibrationsC Eustachian tube Converts vibrations to nerve impulsesD Cochlea Balances the air pressure in both ears

8. What happens in the eyes of a student who walks from a bright room into a dark

room at night?

A The pupil enlarges

B The lens becomes stretched

C The eyeball becomes longer

D The distance between the lens and the cornea increases

A

B

C

D



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9. The correct sequence of the path taken by a sound wave is

A. Cochlea ossicles ear drum auditory nerve

B. ear drum cochlea ossicles auditory nerve

C. ear drum ossicles cochlea auditory nerve

D. ossicles ear drum auditory nerve cochlea

10. The auditory canal is found in the

A. Outer ear

B. Middle ear

C. Inner ear

D. Ossicle

11. Which two of of the five senses help to determine distance?

A. Sight and sound

B. Taste and touch

C. Smell and sight

D. Sound and smell

12. The functions of the skin are to:

I. cover the internal organs.

II. keep the body temperature constant.

III. release waste and toxins from the body.

IV. detect chemical stimulus.

A I and II only

B II and III only

C I, II and III

D I, II, III and IV

13. When Ali experiences a runny nose, which other part of his body gets affected

or becomes less effective?

A. The brain feels dizzy and he is unable to balance his whole body.

B. The mouth feels tasteless and he is unable to enjoy his food.

C. The skin feels dry and he feels uncomfortable.

D. The eye releases more liquid and he is unable to have a clear vision.



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14. State the name of the eye defect shown in Figure 4 below and the way to

overcome the defect.

Figure 4

Defect Way to overcome the defect

A Astigmatism Cylindrical lens

B Short sightedness Concave lensC Long sightedness Convex lensD Short sightedness Convex lens

15. What will happen when Rathika looks at the animals as shown in Figure 5

below?

Figure 5

A. She can see both the dog and the rabbit

B. She can see the rabbit but cannot see the dog

C. She can see the dog but cannot see the rabbit

D. She cannot see both the dog nor the rabbit.



creeping plant

tendril

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17.

F

Figure 2

The apparatus above was set up and left for five days. What will you observe after

five days?

A The shoots will grow upwards and the roots will grow to the right

B The shoots will grow upwards and the roots will grow downwards

C The shoots will grow upwards and the roots will grow to the left

D The shoots and roots will grow to the left

18. Which of the following movements shows tropism?

I The leaves of a Mimosa pudica plant will close when they are touched

II The roots of a plant grow towards water

III The tendrils of a plant grow towards a fence

IV The pitcher-plant traps an ant

A I and III only

B II and III only

C I, II and III onlyD I, II, III and IV

16. Figure 1 shows a creeping plant.

Figure 1

Which type of tropism is shown by the green plant in Figure 1..A SeismonastyB Hydrotropism

C PhototropismD Thigmotropism



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19.

Which part of the plant is described in the notes above?A The shoots

B The roots

C The tendrils

D The fruits

20. Figure 3 below shows the response of plants towards light stimulus. What is

observed after a few days?

P Q

Figure 3

Shoot of plant P Shoot of plant Q

A Grows upright Grows uprightB Grows upright Bends to the leftC Bends to the left Grows uprightD Bends to the left Bends to the left

Questions 6 and 7 are based on Figure 4 below.

Figure 4

21. Which of the following animals has the same vision as the animal shown

above?

A. Owl

Shows positive phototropismShows negative geotropism



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B. Deer

C. Gold fish

D. Sparrow

22. What is the advantage of having the vision as shown above?A. Vision is 2-dimensional

B. Field of vision is narrow

C. Can estimate distance

D. Can see the enemy that comes from behind.

23. Which of the following plants show nastic responses?

I. Venus fly-trap

II. Sunflower

III. Mimosa pudica

IV. Pitcher plant

A. I and III

B. I and IV

C. I, III and IV

D. I, II and III

24. Which part of the eye controls the thickness of the lens?

Y

X Z

W

A. W

B. X

C. Y

D. Z

25. Which of the following responses helps to hold plants securely in the soil?

A. Positive hydrotropismB. Positive geotropism



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C. Positive phototropism

D. Positive tigmotropism

26. Which of the following is the application of sound reflection?

A. Visualising the bones using the X-rayB. Estimating the distance of the car in front of us.

C. Estimating the depth of the sea

D. Determining the source of the sound.

27. Why do plants respond to stimuli?

A. To disperse their seeds for survival

B. To hold on firmly to the ground

C. To assist in pollination

D. To obtain their basic needs for survival

28. Which of the following is an eye defect?

A. Optical illusion

B. Stereoscopic

C. Astigmatism

D. Blind spot

SECTION B

1. Figure 1 shows a cross section of a human eye.



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Q

a) Label the following structures in Diagram 1.

Choroid yellow spot

[ 2 marks]

b) Based on the structure P or Q in Diagram1, complete Table 1.

Name of structure Function of structure

Table 1

2. Diagram 2 below shows the response of plants towards stimuli.

Diagram 2

a) Write the hypothesis of this experiment.

.……………………………………………………………………………………………..( 1 mark)

Diagram 1

P

Dry cottonwool

P

Q



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b) State the variables :

i) Constant variable : …………………………………………………………………….

ii) Manipulated variable : …………………………………………………………………...

iii) Responding variable………………………………………………………………….....

(3 marks)

c) Predict what will happen to the roots of the seedlings in Q after a few days.

………………………………………………………………………………….. ( 1 mark)

d) Name the response stated in 2 c)

………………………………………………………………………………….. ( 1 mark)

e) What is the importance of the response stated in 2 c)?

………………………………………………………………………………….. ( 1 mark)

f) What is the function of anhydrous calcium chloride?

………………………………………………………………………………….. ( 1 mark)

g) Predict what will happen to the shoots of the seedlings after a few days.

………………………………………………………………………………….. ( 1 mark)

h) Name of the response stated in 2 g).

………………………………………………………………………………….. ( 1 mark)

i) What is the importance of the response stated in 2 g)?

………………………………………………………………………………….. ( 1 mark)



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3. Diagram 1 below shows an experiment carried out by a student.

Iron sheet Cotton cloth

Diagram 1

a) What is the aim of the experiment above?

………………………………………………………………………………………………

( 1 mark)

b) State the variables for the above experiment :

i) Constant variable : ……………………………………………………..

ii) Manipulated variable : ………………………………………………….

iii) Responding variable : ………………………………………………….

( 3 marks)c) Write the observations for the above experiment in Table 1 below.

Material ObservationIron sheetCotton cloth

Table 1

( 2 marks)

d) From your observations, which type of the surface is

i) a better reflector of sound? ……………………………………….

ii) a better absorber of sound? ………………………………………

( 2 marks)

e) What is produced when sound is reflected ?

……………………………………………………………………………………………...

( 1 mark)

f) Which animal uses the reflection of sound to help it move about?

………………………………………………………………………………………….....



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( 1 mark)

4. Diagram 2 below shows an experiment carried out by a student.

Diagram 2

a) What is the aim of the experiment above?

…………………………………………………………………………………………….

( 1 marks)

b) State the variables :

i) Constant variable : …………………………………………………………

ii) Manipulate variable : …………………………………………………………

iii) Responding variable : …………………………………………………………

( 3 marks)

c) Write your observations for the experiment:

Situation Observation

Electric bell is switched on

Both the electric bell andvacuum pump are switched on

( 2 marks)

d) What is the conclusion of the experiment?

………………………………………………………………………………………

( 1 mark)

e) Explain why sound cannot travel through vacuum.

……………………………………………………………………………………………

( 1 mark)

MODULE 08(THE WORLD THROUGH OUR SENSES)

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