Question 1

Physical change is a change in the physical properties of a substance such as size or shape. Which of the following is NOT a physical change?

Accepted Answer

Burning a log of wood

Answer

Breaking a glass

Answer

Crushing a can

Answer

Dissolving sugar in water

Question 2

A phase change is a physical process in which a substance goes from one phase to another. When does phase change occur?

Accepted Answer

Heat is added to or removed from the substance

Answer

A substance is combined with another substance

Answer

Particles of the substance are not changing their motion.

Answer

Particles of the substance maintain their kinetic energy.

Question 3

What happens to the particle arrangement of a liquid when it changes to gas?

Accepted Answer

Particles move close to one another.

Answer

Particles do not move. Particles are close together with no regular arrangement.

Answer

None of the above

Answer

Particles move distant from each other in random motion.

Question 4

Which of the following is NOT a chemical change?

Accepted Answer

chewing a gum

Answer

using oxygen in body cells

Answer

formation of green leaves in plants

Answer

neutralizing stomach acid with an antacid tablet

Question 5

Which is evidence of chemical change?

Accepted Answer

Appearance of new substance

Answer

Increase of temperature

Answer

Formation of new shape

Answer

Drastic change of size

Question 6

What happens to the particles of a substance after undergoing a chemical change?

Accepted Answer

All of the above

Answer

Bonds between particles of the substances are broken

Answer

New bonds are formed between particles of the substances.

Answer

Energy is absorbed or released by the particles.

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