Study Guide: Physical and Chemical Changes

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

• A) Melting ice

• B) Burning wood

• C) Rusting iron

• D) Baking a cake

What is a sign that a chemical change has occurred?

• Change in color

• Change in shape

• Change in size

• Change in texture

What is the definition of a physical change?

• Changes that affect the form of a chemical substance, but not its chemical composition.

• Changes that result in the formation of new chemical substances.

• Changes that involve the breaking and forming of chemical bonds.

• Changes that are always irreversible.

What is the definition of a chemical change?

• Changes that result in the formation of new chemical substances.

• Changes that do not alter the chemical composition.

• Changes that are easily reversible.

• Changes that only affect physical properties.

Which of the following is a chemical change?

• Change in shape

• Change in state

• Formation of a new substance

• Dissolving in water

Which process is a chemical change?

• Freezing water

• Cutting paper

• Burning a candle

• Boiling water

During a physical change, what happens to the molecules of a substance?

• They are destroyed

• They change into different molecules

• They stay the same but are rearranged

• They form new substances

Which of the following is NOT an indicator of a chemical change?

• Change in color

• Change in temperature

• Change in shape

• Formation of gas

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

• Dissolving sugar in water

• Melting butter

• Baking bread

• Cutting hair