Phases of Matter and Particle Motion

Front

What phase are the particles tightly packed together?

Back

Solid

Front

What happens to a solid when thermal energy is increased?

Back

It becomes a liquid and the particles speed up.

Front

What is the relationship between the speed of molecules and temperature?

Back

The faster the molecules are moving, the higher the temperature.

Front

True or False: When the thermal energy of helium particles in a balloon increases, the particles move faster and spread out.

Back

True

Front

During which phase change is thermal energy increased in a substance?

Back

Liquid to gas

Front

What are the three main phases of matter?

Back

Solid, Liquid, Gas

Front

What is the main characteristic of particles in a solid?

Back

They are closely packed and vibrate in place.

Front

How do particles behave in a liquid?

Back

They are close together but can move past each other, allowing liquids to flow.

Front

What happens to gas particles when thermal energy is added?

Back

They move faster and spread out more.

Front

What is melting?

Back

The process of a solid turning into a liquid when thermal energy is added.