Phase Change Critical Juncture

Front

What is a phase change?

Back

A phase change is the transformation of a substance from one state of matter to another, such as from solid to liquid or liquid to gas.

Front

What happens to molecules during a phase change from gas to liquid?

Back

The molecules move slower and begin to move around each other as they lose energy.

Front

What is the effect of energy transfer on the phase of a substance?

Back

Transferring energy can cause a substance to change its phase, either by absorbing energy (melting or vaporizing) or releasing energy (freezing or condensing).

Front

What is the difference between a solid and a liquid in terms of molecular movement?

Back

In a solid, molecules vibrate in place; in a liquid, molecules move around each other.

Front

What is the role of molecular attraction in phase changes?

Back

Molecular attraction determines how closely molecules are held together, affecting their movement and the phase of the substance.

Front

What happens to the molecules of a substance when it is heated?

Back

When a substance is heated, its molecules gain energy, move faster, and may change phase from solid to liquid or liquid to gas.

Front

What is the relationship between temperature and phase changes?

Back

Temperature affects the energy of molecules; higher temperatures can lead to phase changes like melting or boiling.

Front

What is condensation?

Back

Condensation is the phase change from gas to liquid, occurring when gas molecules lose energy and come closer together.

Front

What is evaporation?

Back

Evaporation is the phase change from liquid to gas, occurring when liquid molecules gain enough energy to break free from the liquid's surface.

Front

What is freezing?

Back

Freezing is the phase change from liquid to solid, occurring when liquid molecules lose energy and become fixed in place.