Force and Pressure (CBSE Class-8 Science): Questions 9 - 15 of 19

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Question number: 9

» Force and Pressure » Pressure » Atmospheric Pressure

MCQ▾

Question

Atmosphere is defined as:

Choices

Choice (4) Response

a.

Gaseous envelop surrounding the earth

b.

Air exerts pressure in all directions

c.

Force between two bodies due to their mass

d.

Earth’s surface

Question number: 10

» Force and Pressure » Pressure » Atmospheric Pressure

MCQ▾

Question

What is Atmospheric Pressure?

Choices

Choice (4) Response

a.

Force between two magnetic poles

b.

Thrust per unit area

c.

Pressure exerted by the air column above us

d.

The force with which the earth pulls a body towards itself

Question number: 11

» Force and Pressure » Contact Forces » Friction

MCQ▾

Question

Contact force which comes into play when a body slides or tends to slide on another body is called as:

Choices

Choice (4) Response

a.

Thrust

b.

Magnetic force

c.

Gravitation

d.

Frictional force

Question number: 12

» Force and Pressure » Exploring Forces » Force Can Change the Shape of an Object

MCQ▾

Question

What happens to a ball when it is squeezed?

Choices

Choice (4) Response

a.

Contact force

b.

Force

c.

Change its state of motion

d.

Change in its shape

Question number: 13

» Force and Pressure » Pressure » Introduction to Concept of Pressure

MCQ▾

Question

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

Question number: 14

» Force and Pressure » Pressure » Introduction to Concept of Pressure

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Pressure

b.

Force

c.

Pull

d.

Push

Question number: 15

» Force and Pressure » Pressure » Atmospheric Pressure

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Air escapes instantly

b.

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

c.

Air pressure inside the balloon is more than outside

d.

Since balloon is made up of rubber and is expandable

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