Physical and Chemical Change

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties. Examples include rusting, burning, and spoiling food.

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 evaporating.

Front

What happens during the boiling of water?

Back

During boiling, water changes from a liquid to a gas (steam) when it reaches its boiling point of 100 °C.

Front

What is the freezing point of water?

Back

The freezing point of water is 0 °C, which is the temperature at which water changes from a liquid to a solid (ice).

Front

What is needed for boiling and melting to occur?

Back

Heat is needed for both boiling and melting to occur.

Front

What is an example of a chemical change?

Back

Spoiling food is an example of a chemical change.

Front

What is an example of a physical change?

Back

Evaporating water is an example of a physical change.

Front

What is the melting point of water?

Back

The melting point of water is 0 °C, which is the temperature at which ice changes to liquid water.

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 the formation of new substances.

Front

What is an example of a substance undergoing a physical change?

Back

An example of a substance undergoing a physical change is ice melting into water.