Sc F2 Chapter 1 Answer PPT

8/9/2019 Sc F2 Chapter 1 Answer PPT

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1. Which of the following are human sense organs?

I Eye lids

II Ears

III TongueIV Skin

A I and III only

B II and IV only

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


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I Eye lids

II Ears

III TongueIV Skin

A I and III only

B II and IV only



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I Eye lids

II Ears

III TongueIV Skin

A I and III only

B II and IV only



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I Eye lids

II Ears

III TongueIV Skin

A I and III only

B II and IV only



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2 Which of the following are parts of the human nervous system?

I The brain

II The spinal cord

IIIPeripheral nerves

IVNeurons

A I and II only

B III and IV only

C II, III and IV only

D I, II, III and IV


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I The brain

II The spinal cord


IVNeurons

A I and II only

B III and IV only


D I, II, III and IV


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I The brain

II The spinal cord

III Peripheral nerves

IV Neurons

A I and II only

B III and IV only


D I, II, III and IV

Central

nervous

system


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I The brain

II The spinal cord


IVNeurons

A I and II only

B III and IV only


D I, II, III and IV


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3 Which part of the human body is the first to receive external stimuli?

A. The brain

B. The sensory organ

C. EffectorsD. Nerves


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3 Which part of the human body is the first to receive external stimuli?

A. The brain

B. The sensory organ

C. EffectorsD. Nerves


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4. The figure below shows a cross-section of a human skin.

Which of the parts labelled A, B, C or D, is most sensitive to pain?


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most sensitive to pain


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4. The figure below shows a cross-section of a human skin.

Which of the parts labelled A, B, C or D, is most sensitive to pain?


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5 Why do different parts of our body have different levels of sensitivityto a stimulus?

I. There are different concentrations of receptors in different parts of our body

II. The epidermal layeris not uniformly thick

III.There are different stimulireceptors in our skin

IV.Thepigmentation of the skin is not uniform A. Iand II only

B. III and IV only

C. II,III and IV only

D. I,II,III and IV


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5 Why do different parts of our body have different levels of sensitivity to a stimulus?

I. There are different concentrations of receptors in different parts of our body

II. The epidermal layeris not uniformly thick

III.There are different stimuli receptors in our skin

IV.The pigmentation of the skin is not uniform A. Iand II only

B. III and IV only

C. II,III and IV only

D. I,II,III and IV


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6 The figure shows a cross-section of the human nose.

What is the function of the part labelledP?

A.To send impulses to the brain

B.To produce mucus

C.To detect and identify smells

D.To filter the air


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B.To produce mucus


D.To filter the air


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B.To produce mucus


D.To filter the air


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7 When our nose produces too much mucus,

we cannot smell well.

What happens when our nose is completely dry?

A. Our nose can immediately detect smellsB. Our nose will produce thin mucus

C. Our nose cannot detect smells

D. Our nose can only detect pleasant smells


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7 When our nose produces too much mucus,

we cannot smell well.

What happens when our nose is completely dry?

A. Our nose can immediately detect smellsB. Our nose will produce thin mucus

C. Our nose cannot detect smells

D. Our nose can only detect pleasant smells


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8. The figure shows parts of a tongue

which are sensitive to four different tastes.

What do M, N, Oand Prepresent?

M N O P

A Saltiness Sourness Sweetness BitternessB Bitterness Sourness Saltiness Sweetness

C Sourness Bitterness Sweetness Saltiness

D Bitterness Saltiness Sweetness Sourness


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M N O P

A Saltiness Sourness Sweetness Bitterness

B Bitterness Sourness Saltiness Sweetness

C Sourness Bitterness Sweetness Saltiness

D Bitterness Saltiness Sweetness Sourness


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10 Which of the following statements is true?

I. Echoes are reflected sound

II. Sound is produced by a vibrating of object

III.The oval window in the earchanges vibrations into impulses

IV.The eardrum vibrates and amplifies sound

A. Ionly

B. I and II only

C. I,II and IV only

D. I,II,III and IV


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A. Ionly

B. I and II only

C. I,II and IV only

D. I,II,III and IV


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A.I only

B.I and II only

C. I,II and IV only

D. I,II,III and IV


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III. The oval window in the ear changes vibrations into impulses

IV. The eardrum vibrates and amplifies sound

A. I only

B. I and II only

C. I, II and IV only

D. I, II, III and IV


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11 Deafness could be caused by damage to the

I. Eardrum

II. Ossicles

III. cochlea

IV. semi-circular canalsA. I and III only

B. I and IV only

C. I, II and III only



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11 Deafness could be caused by damage to the

I. Eardrum

II. Ossicles

III. cochlea

IV. semi-circular canalsA. I and III only

B. I and IV only




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12. The figure above shows a cross-section of the human ear.Which of the parts, labelled A, B, C or D, is not involved in the

hearing mechanism?

Eardrum

ossiclessemi-circular canals

Auditory

nerve


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12. The figure above shows a cross-section of the human ear.Which of the parts, labelled A, B, C or D, is not involved in the

hearing mechanism?

Eardrum

ossiclessemi-circular canals

Auditory

nerve

Oval Window


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13 Which of the following is not a part of the eye?

A. Conjunctiva

B. Cornea

C. Cochlea

D. Choroid


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13 Which of the following is not a part of the eye?

A. Conjunctiva

B. Cornea

C. Cochlea

D. Choroid


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14. The figure above shows a cross-section of the human eye

Which of the part labelled A, B, C or D, is most sensitive to light?


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14. The figure above shows a cross-section of the human eye

Which of the part labelled A, B, C or D, is most sensitive to light?


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15 A student looks at a butterfly whichis about 2 metres away from him.

He removes his spectacles and looks closely at it.

His friends call him from the far end of the school field and he turns to look at them.

Which of the following shows the changes his eyes lenses undergo in

the correct sequence?

A

B

C

D


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A

B

C

D


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16 The figure shows a sight defect. What causes this sight defect?

A. Reading books in dim light

B. A thick lens

C. A short eyeball

D. Fewer cells on the retina


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16 The figure shows a sight defect. What causes this sight defect?

A. Reading books in dim light

B. A thick lens

C. A short eyeball

D. Fewer cells on the retina


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yBinoculars y Telescope

yMicroscope y Hand lensySpectacles

17 Which of the following conditions cannot be

aided by using any of the above instruments?

I. Astigmatism

II. Night blindness

III. Short sightedness

IV. Colour blindness

A.I and III only

B.II and IV only

C.I, II and III only

D.I, II, III and IV


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV

Astigmatism

(Kerosakkan pada kanta mata)


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV

Bi l T l


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV

Bi l T l


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV

Bi l T l


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV only


D.I, II, III and IV

Bi l T l


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV onlyC.I, II and III only

D.I, II, III and IV


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Colour blindness


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Colour blindness

Binoculars Telescope


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I. Astigmatism

II. Night blindness



A.I and III only

B.II and IV onlyC.I, II and III only

D.I, II, III and IV

18 If you knock two stones together underwater


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18 If you knock two stones together underwater,

you will hear faint sounds above the water. However,

if you blow a whistle underwater, no sound is heard above the water.

What can you infer from these observations?

A. A whistle needs a vibrating air column to produce soundB. Sound vibrations cannot be produced in water

C. Sometimes, sound waves cannot travel through water

D. Not enough energy is produced when a whistle is blown



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20 Which of the following instruments


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20. Which of the following instruments

can help humans overcome hearing limitations(pendengaran terhad)

and hearing defects(kecacatan pendengaran)?

I. Stethoscopes

II. Hearing aidsIII. Microphones

IV. Loudspeakers

A. I and II only

B. III and IV only





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I. Stethoscopes


IV. Loudspeakers

A. I and II only

B. III and IV only




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I. Stethoscopes


IV. Loudspeakers

A. I and II only

B. III and IV only




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21 How does a plant get mineral salts and water from the soil?


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p g

A. By positive phototropism

B. By positive hydrotropism

C. By positive geotropism

D. By positive thigmotropism


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yShows positive phototropism

yShows negative geotropism22

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

B.The roots

C.The tendrils

D.The fruits


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B.The roots

C.The tendrils

D.The fruits


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B.The roots

C.The tendrils

D.The fruits


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B.The roots

C.The tendrils

D.The fruits


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23 The apparatus in the figure 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 leftD.The shoots and roots will grow to the left


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24 What response is shown by the plant shown in the figure above?

A Seismonastic response


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A.Seismonastic response

B.Phototropism response

C.Thigmotropism response

D.Hydrotropism response

24 What response is shown by the plant shown in the figure above?

A Seismonastic response


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A.Seismonastic response

B.Phototropism response

C.Thigmotropism response

D.Hydrotropism response

25 Which of the following movements shows tropism?


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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 antA. I and III only

B. II and III only




I Th l f Mi di l ill l h h h d


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B. II and III only




I Th l f Mi di l t ill l h th t h d


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B. II and III only




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B. II and III only






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B. II and III only




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Paper2

Answer all the questions.

How the ear work


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How the ear work

The figure below shows a cross-section of the human ear.1


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a. Give two reasons why the ear is important to human beings.

(i) Helps us to hear

(ii) Helps us in balancing our bodies

b.Label the following parts on the figure


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g p g

c) Lily noticed that her grandfather speaks to her very loudly.

At fi t h th ht h h ti t h


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At first, she thought he was shouting at her.

Then, she realised that this was the way he normally talks.

i. Why do you think her grandfather speaks loudly?

ii. Explain your answer in (c) (i).iii.What device should Lilys grandfather use to help him overcome this proble

Bye Bye.

i. Why do you think her grandfather speaks loudly?


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He does nothear very well

Hearing limitations(pendengaran terhad)

Hearing defects(kecacatan pendengaran

ii. Explain your answer in (c) (i).

As a person ages,

his ossicles fuse together andhis eardrum becomes less elastic.

iii.What device should Lilys grandfather use to help him overcome this problem?


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(iii) Ahearing aid

2


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The figure below shows a cross-section of the human eye2


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The figure above shows a cross-section of the human eye2


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(a)The eye is sensitive to which stimulus?

Light stimulus

b.Label the following parts on the figure above.


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Ciliary muscles vitreous humour yellow spot

(c) What changes take place in our eyes when we

i f d k l t b i ht l ?


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i. move from a dark place to a bright place?

The pupil is big in dark places and becomes smaller in bright places


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(c) What changes take place in our eyes when we


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ii. look at a distant object and then at a near object?

The ciliary muscles relax to make the lens thin to look at distant objects.

Fornear objects, the ciliary muscles contract and the lens become thick.


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3 A student is blindfolded. The following objects were placed on his forearm,

back of the hand and fingertip:


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Pencil Marble Small notebook

The student had to guess and identify the objects.

The number of guesses he made before correctly identifying

the objects is recorded in the table below.

Part of the

body

Number of guesses

Pencil Marble Small

notebook

Forearm 3 4 9

Back of hand 7 3 11

Fingertip 1 2 2


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Part of the

body

Number of guesses

Pencil Marble Small

notebook

Forearm 3 4 9




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Part of the body

Number of guesses

Pencil Marble Small

notebook

Back of hand 7 3 11




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Part of the

body

Number of guesses

Pencil Marble Small

notebook

Fingertip 1 2 2


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(e)What is the relationship between the part of the body used and how easy

it was to identify the objects?


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it was to identify the objects?

It was the easiest to identify the objects when the fingertip were used,

as compared to the forearm and back ofhand

(f)Give two reasons to explain why fewer guesses were needed

when objects were placed on the fingertip.

(i) There are more receptors in the fingertip(ii) The fingertip have thinner epidermis

(g)Name two other receptors that are present in the skin.

(i) Heat receptors(ii) Pain receptors

4


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The apparatus above was used in a science activity.

The apparatus was set up and observed everyday for one week.

(a)What is the aim of this activity?


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(a)What is the aim of this activity?

The aim of the activity was to determine

the response of plants to light and water stimuli.

(b) What would most probably be used as the membrane in the activity,

a plastic sheet or Visking tubing material?


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a plastic sheetorVisking tubing material?

Visking tubing material


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(c)Draw the position of the roots

and shoots after one week.


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(e)State the

i. part of the plant that responds to water

ii type of response involved


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( )

(+)positive hydrotropism

Nagetive hydrotropism

ii.type of response involved

(i) roots(ii) positive hydrotropism

(f) Why are tropism responses important to plants?

Tropism responses enable a plant to obtain the


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Tropism responses enable a plant to obtain the

resources needed to sustain its life


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Sc F2 Chapter 1 Answer PPT