Sample papers for 8th Class Science Science Sample Paper-3

A)

Cells can be easily seen with naked eyes.

B)

Insect?s egg is not a cell.

C)

A single cell can perform all the functions in a unicellular organism.

D)

The size and shape of cells is uniform in multicellular organism.

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2)

Choose the correct option:

(ii) In human beings, after fertilization; the structure which gets embedded in the wall of uterus is -

A)

ovum

B)

embryo

C)

foetus

D)

zygote

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3)

Choose the correct option:

(iii) Reproductive age in women starts when

A)

menstruation starts

B)

breasts start developing

C)

body weight increase

D)

all of these

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4)

Choose the correct option:

(iv) During dry weather while combing hair, sometimes we experience hair flying apart. The force responsible for this is:

A)

force of gravity

B)

electrostatic force

C)

force of friction

D)

magnetic force.

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5)

Choose the correct option:

(v) A toy car released with the same initial speed will travel farthest on

A)

muddy surface

B)

polished marble surface

C)

cemented surface

D)

glass block

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6)

Choose the correct option:

(vi) Loudness of sound is measured in units of:

A)

decibel (dB)

B)

hertz (Hz)

C)

metre (m)

D)

metre/second (m/s)

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7)

Choose the correct option:

(vii) The movement of the earth?s plates causes

A)

cyclones

B)

lightning

C)

earthquakes

D)

thunderstorms.

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8)

Choose the correct option:

(viii) We can see a non-luminous object, when light is

A)

emitted by the object falls on the eye.

B)

reflected from the object towards our eye

C)

completely passes through the object

D)

gets completely absorbed by the object

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9)

Choose the correct option:

(ix) Morning star is the name given to:

A)

Pole Star

B)

Star Sirius

C)

Planet Jupiter

D)

Planet Venus

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10)

Choose the correct option:

(x) The phenomenon of marble cancer is due to

A)

soot particles

B)

CFCs

C)

fog

D)

acid rain

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11)

(i) In what situation does the net force become zero?

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12)

(ii) What is a tester?

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13)

(iii) Who discovered the static electricity or lightning in clouds?

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14)

(iv) How many kinds of nerve cells are there in retina?

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15)

(v) Name the brightest planet in the night sky.

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16)

(vi) What are multiple images?

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17)

(i) Name the practice followed for large scale rearing of farm animals.

(ii) What facilities are provided to farm animals?

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18)

What do you mean by symbiotic relationship?

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19)

What is 4R principle?

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20)

Sodium metal is kept in kerosene but not in water. Why?

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21)

Which zone of a flame does a goldsmith use for melting gold and silver and why?

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22)

Crackers on ignition produce sound. Why?

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23)

Explain why chloroplasts are found only in plant cells?

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24)

Mitochondria are important organelles of cell, often called 'powerhouse' of the cell. Give reason.

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25)

Write difference between internal fertilization and external fertilization.

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26)

Write a short note on -

Adam’s apple

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27)

What do you mean by vacuum? What happens to the loudness of sound in vacuum?

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28)

It is safer to use a wireless telephone rather than using a landline telephone during lightning. Explain the statement with the help of a reason.

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29)

The bulb glows when the electric current passes through it. Explain why?

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30)

Differentiate between Fertilizer and Manure.

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31)

Complete the flowchart:

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32)

Friction is called a necessary evil. Why?

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33)

Why is it very difficult to control forest fire?

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34)

Discuss the various ways to reduce the friction.

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35)

An alarm bell is kept inside a vessel as shown in Fig. A person standing close to it can distinctly hear the sound of alarm. Now if the air inside the vessel is removed completely how will the loudness of alarm get affected for the same person?

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36)

How is \[C{{O}_{2}}\] added to the atmosphere in excess?

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37)

Discuss various systems of irrigation.

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8th Class Science Sample Paper

done Science Sample Paper-3 Total Questions - 37 [Download]

Science Sample Paper-3 Total Questions - 37 [Download]