Unit 2 Review Fall 2025

Front

What process occurs during melting?

Back

Endothermic process, where heat is absorbed to change a solid to a liquid.

Front

What is evidence of a chemical reaction?

Back

A new substance has formed.

Front

What process occurs during vaporization?

Back

Endothermic process, where heat is absorbed to change a liquid to a gas.

Front

How many observations indicate a new substance was formed when a solid is combined with a liquid?

Back

3 observations.

Front

What describes a precipitate?

Back

A solid forms when one liquid is poured into another.

Front

What is an endothermic process?

Back

A process that absorbs heat from the surroundings.

Front

What is an exothermic process?

Back

A process that releases heat to the surroundings.

Front

What is a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a solid?

Back

A state of matter characterized by its definite shape and volume.