Question

volume
the volume of an object is how much space it takes up. gas particles do not stick together. they spread out. therefore, the volume of a gas always depends on the container the gas is in.
for example, what happens when you gently squeeze a balloon? the balloon does not usually break unless a lot of pressure is put on the balloon. when you squeeze the balloon, you change the volume of the gas inside of it. the particles of the gas are being forced into a smaller volume.
pressure
the amount of force that is put on an area is called pressure. you can think about pressure as the number of times the particles of a gas hit the inside of their container.
the figure below shows two different kinds of balls: a basketball and a beach ball. they are both the same size and hold the same volume of air, which is a gas. there are more particles of gas in the basketball than in the beach ball. this means there are more particles that are hitting the inside of the basketball. there is greater pressure in the basketball. this makes the basketball feel harder than the beach ball.
gas and pressure
high pressure
low pressure
the basketball has a higher pressure because there are more particles of gas in it, and they are closer together. the particles collide with the inside of the ball at a faster rate.
the beach ball has a lower pressure because there are fewer particles of gas, and they are farther apart. the particles in the beach ball collide with the inside of the ball at a slower rate.
reading check

1. describe what is pressure?

standards check
ps 1a a substance has characteristic properties, such as density, a boiling point, and solubility, all of which are independent of the amount of the sample. a mixture of substances often can be separated into the original substances using one or more of the characteristic properties.

1. identify what two factors influence the volume of a gas?

Explanation:

Answer:

(4) The amount of force that is put on an area; can be thought of as the number of times the particles of a gas hit the inside of their container
(5) The container the gas is in and the number of gas - particles (more particles can mean a different volume if the container allows expansion or compression)