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 dissolving.

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 substance. Examples include rusting, burning, and rotting.

Front

Is a rotting banana a physical or chemical change?

Back

Chemical Change

Front

What happens during a physical change?

Back

During a physical change, the form of a substance may change, but its chemical identity remains the same.

Front

What happens during a chemical change?

Back

During a chemical change, the substances involved undergo a transformation that changes their chemical structure, resulting in new substances.

Front

What is an example of a physical change?

Back

Mixing the ingredients to make trail mix.

Front

What is an example of a chemical change?

Back

A rotting banana.

Front

How can you separate a mixture of sugar, sand, and water?

Back

Filter the sand from the sugar and water, then heat the mixture, causing the water to evaporate.

Front

What indicates a chemical change has occurred?

Back

A change in temperature, color, or the production of gas or precipitate.

Front

What is an example of a physical change that is NOT a change of state?

Back

Paper being cut.