Force and Pressure-Pressure [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 1 - 5 of 6

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Question 1

Question MCQ▾

Atmosphere is defined as:

Choices

Choice (4)Response

a.

Force between two bodies due to their mass

b.

Earth՚s surface

c.

Gaseous envelop surrounding the earth

d.

Air exerts pressure in all directions

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Question 2

Question MCQ▾

What is Atmospheric Pressure?

Choices

Choice (4)Response

a.

Thrust per unit area

b.

The force with which the earth pulls a body towards itself

c.

Force between two magnetic poles

d.

Pressure exerted by the air column above us

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Question 3

Question MCQ▾

Why wheels of a battle tank move over a belt:

Choices

Choice (4)Response

a.

Belt helps to distributing the weight of the tank over a large area.

b.

Battle tank is heavy

c.

Belt helps to distributing the weight of the tank over a small area

d.

Increased pressure exerted by the tank on the ground

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Question 4

Question MCQ▾

Thrust acting on a unit area of a surface is called:

Choices

Choice (4)Response

a.

Push

b.

Pull

c.

Pressure

d.

Force

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Question 5

Question MCQ▾

Why does a balloon make a noise when it is popped?

Choices

Choice (4)Response

a.

Air pressure inside the balloon is more than outside

b.

Molecules of air inside the balloon coming into sudden contact with the molecules of air outside the balloon.

c.

Air escapes instantly

d.

Since balloon is made up of rubber and is expandable

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