States of Matter: Phase Changes

What is the primary factor that causes matter to change between different states?

• Pressure

• Gravity

• Energy

• Volume

What happens to the atoms of a solid when it gains heat and changes into a liquid?

• They become more closely packed and stop moving.

• They speed up and move further apart.

• They change into different types of atoms.

• They remain in place but become colder.

What is the process called when a liquid gains heat and changes into a gas?

• Condensation

• Freezing

• Melting

• Evaporation

How does boiling differ from evaporation?

• Boiling occurs at lower temperatures than evaporation.

• Boiling involves a liquid gaining large amounts of heat and rapidly changing into a gas, while evaporation is a slower process.

• Evaporation only happens in the water cycle, while boiling can happen anywhere.

• Boiling changes a solid to a gas, while evaporation changes a liquid to a gas.

What is the scientific definition of "cold"?

• A form of energy

• The presence of cold particles

• The absence of heat

• A type of matter

When a gas loses heat and undergoes condensation, what happens to its atoms?

• They speed up and spread further apart.

• They slow down and move closer together.

• They remain unchanged in their movement and spacing.

• They directly transform into a solid state.

What is the term for the process where a liquid loses heat and transforms into a solid?

• Melting

• Evaporation

• Condensation

• Freezing

According to the Law of Conservation of Mass, what happens to mass when matter changes state?

• Mass is always created or destroyed.

• Mass can be created but not destroyed.

• Mass is neither created nor destroyed.

• Mass is converted into energy.