# P2.3.3 - Pressure in Gases Flashcards

1
Q

What is gas pressure?

A

When gas particles collide into an area

2
Q

What do we include when planning an experiment to take into account safety?

A

A risk assessment

3
Q

What happens tot he size of a balloon when you cool it down and why?

A

It decreases in size.

The gas pressure in the balloon decreases.

Because the gas particles move more slowly so fewer collisions.

4
Q

What does a risk assessment look like?

A
5
Q

What happens to the movement of gas particles when you decrease their temperature?

A

They move around more slowly.

6
Q

The more collisions, the ________ the gas pressure.

A

The more collisions, the higher the gas pressure.

7
Q

Why is atmospheric pressure less up a mountain?

A

Because you are above most of the gas particles in the atmosphere so fewer can collide into you (the particles are more dense at sea level)

8
Q

Define pressure.

A

When a force acts over an area.

9
Q

Why does the pressure of a gas inside a container increase when the volume of the container is decreased?

A

Becuase the particles of gas collide more with the walls of the container.

10
Q

If you decrease the volume of a container, what happens to the pressure of the gas inside it?

A

The gas pressure increases.

11
Q

When planning an experiment how can we make it more reliable?

A

By repeating each measurement several times.

12
Q

What is meant by density of gas particles?

A

How close together the gas particles are.

13
Q

What happens to the movement of gas particles when you increase their temperature?

A

They move around more quickly.

14
Q

In which direction does gas pressure act?

A

All directions

15
Q

The air around you that collides with your body is called…

A

atmospheric pressure.

16
Q

Where is atmospheric pressure greatest? At sea level or on top of a mountain?

A

At sea level

17
Q

What happens to gas pressure inside a container when your decrease the temperature.

A

It decreases

18
Q

Wha happens tot he pressure of a gas inside a container when you increase its temperature?

A

Pressure increases.