Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same. Examples include melting ice or tearing paper.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include rusting iron or burning wood.

Front

What happens to thermal energy when a liquid freezes?

Back

Thermal energy is removed from the liquid during freezing.

Front

What happens to a sugar cube in hot water?

Back

The sugar cube will dissolve in the hot water.

Front

What state of matter has a definite shape and volume?

Back

Solid.

Front

What state of matter takes the shape of its container?

Back

Liquid.

Front

What state of matter has no definite shape or volume?

Back

Gas.

Front

What is rust?

Back

Rust is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice.

Front

What is an example of a chemical change?

Back

An example of a chemical change is baking a cake.