States/Phases/Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and breaking.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and changes the composition of the original substance. Examples include burning, rusting, and baking.

Front

Is breaking glass a chemical or physical change?

Back

Physical change.

Front

What happens to the energy in a liquid when it turns into a solid?

Back

The energy is decreasing.

Front

What is an example of a chemical change?

Back

Baking a cake is an example of a chemical change.

Front

Is burning wood a chemical or physical change?

Back

Chemical change.

Front

What happens to a copper penny over time?

Back

A copper penny can turn greenish due to a chemical change called oxidation.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not change the substance's chemical identity, while a chemical change results in new substances being formed.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is the definition of states of matter?

Back

States of matter refer to the distinct forms that different phases of matter take on, primarily solid, liquid, and gas.