Gas Intro

What is diffusion?

• The movement of gas particles from a higher concentration to a lower concentration.

• The rate at which gas flows through the air.

• An explosion of gases.

• The ability of a gas to move from high pressure to a low pressure.

What is movement of one material through another (higher concentration to lower concentration)?

• diffusion

• temperature

• barometer

• pressure

What is an instrument used to measure atmospheric pressure?

• barometer

• thermometer

• calorimeter

• Kelvin

According to the kinetic theory of matter, all matter is composed of

• waves

• particles

• solid material

• plasma

When the temperature of a substance is lowered, its particles

• vibrate more quickly

• stop vibrating completely

• escape the attractive forces of the other particles

• vibrate more slowly

Why can people on one side of a room smell the scent of an air freshener sprayed on the opposite side of the room?

• The molecules of air freshener have thermally expanded

• The air pressure where the freshener was sprayed is greater than in the rest of the room

• The molecules of air freshener spread out until they are evenly distributed throughout the room

• The molecules of air freshener are amorphous

Kinetic Energy is

• stored energy

• energy of an object due to its motion

A gas is composed of tiny particles separated by _________________ ___________.

• air and water

• empty space

• gas bubbles

True or False: Gases move in a straight line until a collision and then their paths change.

• True

• Fasle

Temperature is a measure of

• Average kinetic energy

• Heat

• Coldness

• Warmth