Quiz on Changes in Matter: Physical vs. Chemical Changes

What is a characteristic of a physical change?

• It produces a new substance.

• It is often reversible.

• It involves the breaking of chemical bonds.

• It always results in a temperature change.

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

• Melting ice into water

• Dissolving salt in water

• Burning wood

• Mixing sand and water

What happens during a chemical change?

• Atoms are rearranged to form new molecules.

• The material remains structurally the same.

• The substance only changes its state.

• The change is easily reversible.

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

• Formation of a precipitate

• Change in color

• Development of an odor

• Change in shape

Why is the rusting of iron considered a chemical change?

• It results in the formation of a new substance.

• It only changes the state of iron.

• It involves a change in texture.

• It can be easily reversed.

What is a common sign of a chemical reaction when vinegar and baking soda are mixed?

• The temperature of the mixture decreases.

• Bubbles form, releasing carbon dioxide gas.

• The mixture changes color.

• The mixture turns into a solid.

Why is the formation of brass considered a physical change?

• Brass is a new chemical compound.

• Copper and zinc chemically bond in brass.

• Brass has the same properties as copper and zinc.

• Copper and zinc do not chemically bond in brass.

Which of the following best describes a chemical change?

• A change in the state of matter

• A change in texture

• The formation of a new substance

• A change in shape