Changes in Matter: Physical vs. Chemical Changes

What is a physical change?

• A change that produces a new substance

• A change that is often reversible

• A change that cannot be reversed

• A change that involves breaking chemical bonds

Which of the following is an example of a chemical change?

• Boiling water

• Burning wood

• Melting ice

• Freezing water

What happens during a chemical change?

• The texture of the material changes

• The change is easily reversible

• Atoms are rearranged to form new substances

• The material stays the same

Which of the following is a sign of a chemical reaction?

• Change in texture

• Change in shape

• Change in temperature

• Change in size

What is an example of a physical change?

• Burning paper

• Dissolving salt in water

• Rotting food

• Rusting of iron