Unit 6 Test Review: States of Matter & Phase Changes

Front

What are the forces that lock particles in place in a solid?

Back

The forces are very strong, preventing the particles from moving freely.

Front

What happens to the forces between particles when a liquid freezes into a solid?

Back

The forces get stronger and begin to lock the particles in place.

Front

What occurs to the forces between particles when a liquid vaporizes into a gas?

Back

The forces disappear, allowing the particles to fully separate.

Front

How does altitude affect atmospheric pressure?

Back

As altitude increases, atmospheric pressure decreases.

Front

What is the effect of altitude on boiling point temperature?

Back

As altitude increases, boiling point temperature decreases.

Front

Define 'solid' in terms of particle arrangement and movement.

Back

In a solid, particles are closely packed together and vibrate in fixed positions.

Front

Define 'liquid' in terms of particle arrangement and movement.

Back

In a liquid, particles are close together but can move past one another, allowing the liquid to flow.

Front

Define 'gas' in terms of particle arrangement and movement.

Back

In a gas, particles are far apart and move freely, filling the container they are in.

Front

What is a phase change?

Back

A phase change is the transition of matter from one state to another, such as solid to liquid or liquid to gas.

Front

What is the process of melting?

Back

Melting is the phase change from solid to liquid, occurring when a solid absorbs heat.