3.6 Pressure in liquids and gases [Mastery check]

Gas pressure is created because...?

Select two sentences.

• gas particles fall downwards

• gas particles move in all directions

• and collide with the walls of their container

• and press on the floor of the container

Select two statements to explain why an increase in temperature results in an increase in gas pressure.

Answers Required: 2

• gas particles move faster at higher temperatures

• resulting in less forceful but more frequent collisions

• resulting in more frequent and more forceful collisions

What will happen to the gas pressure in a container if the gas particles move more quickly?

Answers Required: 1

• The gas pressure will increase.

• The gas pressure will decrease.

How does the number of collisions affect the gas pressure in a container?

Answers Required: 1

• If there are more collisions, the pressure in the container will be lower.

• If there are more collisions, the pressure in the container will be higher.

• The number of collisions does not affect the pressure in the container.

If more air is pumped into a tire, what will happen to the pressure in the tire?

Answers Required: 1

• The pressure will increase.

• The pressure will decrease.

• The pressure will not change.

What causes the pressure in a tyre to increase as air is pumped into the tyre?

Answers Required: 1

• There are more air particles inside the tyre, so there are more collisions between the air particles and the walls inside the tyre.

• There are more air particles inside the tyre, so the tyre increases in size.

• There are more air particles inside the tyre, so the collisions between the air particles and the walls inside the tyre will be faster.

When a gas is heated, what happens to the particles in the gas?

Answers Required: 1

• The particles move more quickly.

• The particles move more slowly.

• The particles rearrange themselves into fixed positions.

How does heating a gas in a sealed container affect the gas pressure?

Answers Required: 1

• The gas pressure increases.

• The gas pressure decreases.

• The gas pressure stays the same.

Why does heating a gas in a sealed container cause the pressure to increase?

Answers Required: 1

• The particles collide with the inside walls of the container with greater force.

• The particles collide with the inside walls of the container more frequently.

• The particles collide with the inside walls of the container more frequently and with greater force.

If you reduce the volume of a sealed syringe containing air, what will happen to the gas pressure inside the syringe?

Answers Required: 1

• The gas pressure will increase.

• The gas pressure will decrease.

• The gas pressure will not be affected.