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 changes in state, shape, or size.

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 the breaking and forming of bonds. Examples include rusting, burning, and cooking.

Front

Is squeezing oranges to make orange juice a physical or chemical change?

Back

Physical change.

Front

What happens to water when it freezes?

Back

When water freezes, it undergoes a physical change from liquid to solid.

Front

What is an example of a physical change?

Back

Freezing juice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

Is hammering wood to build a treehouse a physical or chemical change?

Back

Physical change.

Front

What is evaporation?

Back

Evaporation is the process by which liquid water turns into water vapor (gas) when it is heated.

Front

What is condensation?

Back

Condensation is the process by which water vapor (gas) cools and turns back into liquid water.

Front

What is melting?

Back

Melting is the process by which a solid turns into a liquid when heated.