Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in an item's properties like its shape, size, or density, without creating a new substance.

Front

What is a chemical change?

Back

A chemical change is a process that creates a new substance, often accompanied by changes in energy, such as heat or light.

Front

Give an example of a physical change.

Back

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

Front

Give an example of a chemical change.

Back

An example of a chemical change is rust forming on iron.

Front

What happens when salt dissolves in water?

Back

When salt dissolves in water, it undergoes a physical change.

Front

What is a precipitate?

Back

A precipitate is a solid that forms from a chemical reaction in a solution.

Front

Is breaking glass a chemical or physical change?

Back

Breaking glass is a physical change.

Front

What is an indicator of a chemical change?

Back

Indicators of a chemical change include color change, gas production, temperature change, and formation of a precipitate.

Front

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

Back

A physical change does not alter the chemical composition of a substance, while a chemical change does.

Front

What is an example of a chemical reaction that produces gas?

Back

An example is vinegar reacting with baking soda to produce carbon dioxide gas.