Amplify Phase Change Review

Front

What is a phase change?

Back

A phase change is a transition of matter from one state (solid, liquid, gas) to another due to the addition or removal of energy.

Front

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

Back

The molecules gain energy, move faster, and begin to overcome their fixed positions, allowing them to flow.

Front

What is the difference between solids, liquids, and gases in terms of molecular movement?

Back

In solids, molecules vibrate in place; in liquids, they flow around each other; in gases, they move freely and rapidly.

Front

What does it mean when molecules are described as 'moving in place'?

Back

It means the molecules are vibrating but not changing their position relative to each other, typical of solids.

Front

What is the effect of adding heat to a solid?

Back

Adding heat to a solid can cause it to undergo a phase change to a liquid as the molecules gain energy and move more freely.

Front

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

Back

The attraction between molecules decreases, allowing them to move far apart and fill the available space.

Front

What is the state of matter where molecules are close together but can still flow?

Back

Liquid.

Front

What is the state of matter where molecules are far apart and move freely?

Back

Gas.

Front

What happens to the energy of molecules when a substance changes from gas to liquid?

Back

The molecules lose energy, which causes them to slow down and come closer together.

Front

What is an example of a phase change?

Back

Melting ice into water is an example of a phase change from solid to liquid.