Amplify Critical Juncture Phase Change

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 when energy is removed?

Back

When energy is removed, molecules slow down and may move closer together, potentially changing from a gas to a liquid or from a liquid to a solid.

Front

What happens to molecules during a phase change when energy is added?

Back

When energy is added, molecules speed up and may move further apart, potentially changing from a solid to a liquid or from a liquid to a gas.

Front

Define kinetic energy in the context of molecular movement.

Back

Kinetic energy is the energy of motion; in molecular terms, it refers to how fast molecules are moving.

Front

What is the relationship between temperature and molecular movement?

Back

As temperature increases, the kinetic energy of molecules increases, causing them to move faster.

Front

What is the effect of strong molecular attraction on phase changes?

Back

Strong molecular attraction can keep molecules close together, making it harder for them to move freely, which can result in a solid or liquid state.

Front

What is the effect of weak molecular attraction on phase changes?

Back

Weak molecular attraction allows molecules to move more freely, which can lead to a gas state when energy is added.

Front

How does a refrigerator change the phase of a substance?

Back

A refrigerator removes energy from a gas, causing it to cool and change into a liquid.

Front

What is the significance of a sealed container in phase change experiments?

Back

A sealed container prevents the exchange of matter with the environment, allowing for controlled observation of phase changes.

Front

What is the difference between a solid, liquid, and gas in terms of molecular arrangement?

Back

In solids, molecules are tightly packed and vibrate in place; in liquids, molecules are close but can move around each other; in gases, molecules are far apart and move freely.