5.4 Explaining gas pressure

Force per unit area.

• Pressure

• Density

• Diffusion

Gas pressure is caused by particles colliding with .............................................

• each other only.

• the walls of a container.

The more you blow in a balloon, the ..................... number of air particles will be in the balloon.

• greater

• fewer

• same

Leaving the balloon in a warm room will warm up the air particles inside-heating will ............................ the speed of the particles inside the balloon.

• decrease

• increase

Leaving the balloon in a warm room will......................................................

• increase the gas pressure due to the air particles hitting the wall more often.

• decrease the gas pressure due to the air particles hitting the wall less often.

Leaving the balloon in a cool room will......................................................

• decrease the balloon size due to decreases in distance between the air particles.

• increase the balloon size due to the distance between the air particles as it becomes farther apart.

Cooling a plastic bottle in a freezer will ......................... the air particles inside.

• speed up

• slow down

Air pressure is the force exerted by air particles .................................. per unit area.

• surrounding the container

• inside the container

Air pressure does not squash you because you have air inside your body too.

• True

• False

At the top of a mountain, the air pressure will be .............................

• low

• high