Quiz on Physical and Chemical Changes

What is a physical change?

• A change that creates a new substance

• A change that affects the physical properties of a substance

• A change that involves a chemical reaction

• A change that cannot be reversed

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

• A nail rusting when exposed to water and oxygen

• Dissolving sugar in water

• Cutting a piece of paper

• Ice melting into water

What is a sign of a chemical change?

• Change in color

• Change in state

• Change in size

• Change in shape

Which of the following statements is true about physical changes?

• They result in a new substance with different properties

• They are usually irreversible

• They always involve heat

• They do not change the identity of the substance

What is density?

• A measure of the amount of mass in a given volume

• A measure of the amount of heat in a substance

• A measure of the amount of light absorbed by a substance

• A measure of the amount of color change in a substance

Which of the following is NOT a sign of a chemical change?

• Formation of a precipitate

• Release or absorption of heat

• Change in color

• Melting of ice