Question 1

A skydiver jumps from an altitude of 41,400 meters and experiences a rapid decrease in atmospheric pressure. Which of the following best explains why the skydiver must wear a pressurized suit during the jump?

Accepted Answer

To protect the body from decompression caused by the drastic drop in external pressure, which could lead to bodily harm.

Question 2

Which of the following statements best describes the cause of gas pressure in a closed container?

Accepted Answer

Gas molecules collide with the surfaces of the container, exerting a force per unit area.

Question 3

A weather map shows a region marked 'H' and another marked 'L'. What does the 'H' indicate, and what weather is typically associated with it?

Accepted Answer

'H' indicates a region of high pressure, usually associated with clear weather.

Question 4

If the number of gas particles in a sealed container is doubled while the volume and temperature remain constant, what happens to the pressure?

Accepted Answer

The pressure is doubled.

Question 5

A person experiences pain in their ears during a rapid descent in an airplane. What is the most likely cause of this pain?

Accepted Answer

The external pressure increases faster than the internal pressure in the ear, causing the eardrum to bulge inward.

Question 6

Which of the following best explains why the pressure inside a container decreases when the volume is increased, assuming constant temperature and number of particles?

Accepted Answer

The concentration of gas molecules decreases, resulting in fewer collisions with the container walls.

Question 7

A sealed jar contains gas at a certain pressure and density. If more gas is added to the jar without changing the volume or temperature, what will happen to the pressure and density?

Accepted Answer

Both pressure and density will increase.

Question 8

Which of the following is a direct consequence of the kinetic molecular theory as it relates to gas pressure?

Accepted Answer

Gas pressure results from the collisions of gas molecules with the walls of the container.

Question 9

If a diver ascends rapidly from a depth where the pressure is 3 atm to the surface where the pressure is 1 atm, what happens to the volume of air in their lungs according to Boyle’s Law?

Accepted Answer

The volume of air in the lungs increases by a factor of 3.

Question 10

Which of the following best describes the relationship between pressure and altitude in Earth’s atmosphere?

Accepted Answer

Pressure decreases with increasing altitude.

Chapter 6: Gases – Properties, Laws, and Applications

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