P.6 Phase Change Pre-Unit Test 2024-25

Front

What is the definition of temperature?

Back

Temperature is a measure of how hot or cold something is.

Front

What is a phase in terms of matter?

Back

A phase is a noticeably different form or state of the same substance.

Front

What happens to water molecules when water changes from a liquid to a solid?

Back

Before the change, the molecules were moving around each other. After the change, the molecules were moving in place.

Front

What does 'freedom of movement' refer to in the context of molecular motion?

Back

Freedom of movement refers to the way molecules in a substance move around relative to each other.

Front

What occurs to molecules when their kinetic energy decreases?

Back

When their kinetic energy decreases, the molecules move slower.

Front

What are the three main phases of matter?

Back

The three main phases of matter are solid, liquid, and gas.

Front

How does temperature affect the phase of a substance?

Back

Increasing temperature can cause a substance to change from solid to liquid (melting) or from liquid to gas (evaporation), while decreasing temperature can cause a substance to change from gas to liquid (condensation) or from liquid to solid (freezing).

Front

What is the relationship between kinetic energy and temperature?

Back

Kinetic energy is directly related to temperature; as temperature increases, the average kinetic energy of the molecules increases.

Front

What is the process called when a solid turns directly into a gas?

Back

The process is called sublimation.

Front

What is condensation in terms of phase change?

Back

Condensation is the process where gas changes into a liquid.