Front

What is the process where substances combine or break apart to form new substances?

Back

Front

What are the two main types of changes in materials?

Back

Front

What is an example of a physical change?

Back

Front

What is an example of a chemical change?

Back

Front

• Why is burning wood considered a chemical change, while melting ice is a physical change?

Back

Burning of wood is a chemical change because the composition of wood is transformed into ash.

Melting ice is a physical change because it retains its chemical composition when the temperature change.