Lesson 2 States of Matter

The process of a gas changing to a liquid is known as _____________.

• condensation
• evaporation
• vaporization
• boiling

The change from a liquid to a gas is ____________.

• vaporization
• evaporation
• boiling
• melting

The combined total of kinetic energy and potential energy in a material's particles is called __________.

• thermal energy
• radiant energy
• chemical energy
• nuclear energy

While a substance is boiling, its temperature __________.

• may increase or decrease, depending on the substance
• decreases
• increases
• does not change

Adding thermal energy to a cup of water may cause the particles to ________.

• move faster
• move closer together
• slow down
• collide less frequently

Breathing on a cold window, water vapor fogs up the cold window when it turns to water. This is an example of _____________.

• condensation
• evaporation
• vaporization
• freezing

_____________ is stored energy due to the interactions between objects or particles.

• potential energy
• kinetic energy
• mechanical energy
• chemical energy

_____________ is the result of the motion of all the particles, and the distance and attractions between those particles in the system.

• thermal energy
• potential energy
• mechanical energy
• chemical energy

When an substance's particles slow down and go into close repeating patterns, the substance is said to be _________.

• solid
• liquid
• gas
• plasma