Evidence of Chemical Change

Front

What is a chemical change?

Back

A change in which new substances are formed.

Front

What happens when milk and vinegar are mixed?

Back

A chemical change occurs, resulting in a precipitate.

Front

How can you identify a chemical change?

Back

Look for signs such as color change, gas production, or formation of a precipitate.

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

Which of the following is NOT a chemical change: sour milk, burning wood, breaking a pencil, rust?

Back

Breaking a pencil is NOT a chemical change.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

Can a chemical change be reversed?

Back

Most chemical changes are not easily reversible.

Front

What is an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture.

Front

What indicates a chemical change has occurred?

Back

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