States of Matter and Phase Changes

Front

What is temperature a measurement of?

Back

Temperature reflects the speed of particles.

Front

In which direction does heat flow?

Back

Heat always flows from hot to cold.

Front

In which state of matter do particles move fastest?

Back

Particles move fastest in a gas.

Front

What describes a vacuum?

Back

A vacuum is a space where there are no particles to collide with the container.

Front

What causes pressure in a gas?

Back

Pressure is caused by particles colliding with the walls of their container.

Front

What are the three main states of matter?

Back

Solid, liquid, and gas.

Front

How do particles behave in a solid?

Back

In a solid, particles are closely packed and vibrate in place.

Front

What happens to particles in a liquid?

Back

In a liquid, particles are close together but can move past each other.

Front

What is the process of changing from a solid to a liquid called?

Back

Melting.

Front

What is the process of changing from a liquid to a gas called?

Back

Evaporation.