EXERCISE : CHAPTER 6

Air Pressure

In the human respiratory system, inhalation takes place when the diaphragm is pulled down. This is because

QUESTION 1

A. The pressure in the chest cavity increases

B. The volume of the chest cavity increases

C. The temperature of the chest cavity increases

D. Outside air pressure

increses

When some air is released from the type of a car, the pressure of the air in the tires decreases. Form this we can conclude that air pressure depends on

QUESTION 2

A. The temperature of the air in the

tyre

B. The volume of the air in the

tyreC. The number of the air particles in the

tyre

D. The speed of the air particles in the

tyre

The air inside the balloon is heated with a fire. What will happen to the particles of air inside the balloon ?

QUESTION 3

A. They will move slowly

B. They will move closer together

C. They will collide with the wall of the balloon more frequently

D. They will become heavier

He will not be able to do this in a vacuum because

QUESTION 4

A. The air pressure in a vacuum is zero

B. The water is heavier in a vacuum

C. There is no gravity in a vacuum

D. The temperature is zero in a vacuum

Which of the following statements explains why the pressure of air decreases when the temperature decreases ?

QUESTION 5

A. The air particles come closer together

B. The air particles move faster

C. The air particles

become bigger

D. The air particles expand

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