Changes in States of Matter

Front

What happens to a liquid when thermal energy is decreased?

Back

The liquid freezes and changes into a solid.

Front

What happens to a solid when thermal energy is increased?

Back

The solid melts and changes into a liquid.

Front

What state of matter is a substance in if its temperature is below its melting point?

Back

A solid state of matter.

Front

What occurs when a large piece of ice is placed on a warm sidewalk?

Back

The ice will melt to form liquid water.

Front

What type of process occurs when energy is released while moving down the phase diagram?

Back

Exothermic process.

Front

What is the process called when a solid turns directly into a gas without becoming a liquid?

Back

Sublimation.

Front

What is the process called when a gas turns into a liquid?

Back

Condensation.

Front

What is the process called when a liquid turns into a gas?

Back

Evaporation.

Front

What is the melting point?

Back

The temperature at which a solid becomes a liquid.

Front

What is freezing?

Back

The process of a liquid turning into a solid.