Sem 1 Final Exam Review 24-25

Front

What happens to the molecules of a substance when it cools down?

Back

The molecules start moving slower.

Front

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

Back

Transferring energy into a substance can cause it to change into a gas.

Front

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

Back

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

Front

What does it mean for molecules to have a 'stronger attraction'?

Back

It means the molecules are held together more tightly, affecting their movement and phase.

Front

What occurs during a phase change from liquid to solid?

Back

The molecules that were moving around each other start moving in place.

Front

How does temperature affect molecular movement?

Back

As temperature decreases, molecular movement slows down; as temperature increases, it speeds up.

Front

What is a phase change?

Back

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

Front

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

Back

The molecules gain energy and move farther apart.

Front

What is the relationship between energy transfer and phase changes?

Back

Energy transfer can cause substances to change phases, such as from solid to liquid or liquid to gas.

Front

What is the significance of molecular attraction in determining the state of a substance?

Back

The strength of molecular attraction determines whether a substance is a solid, liquid, or gas.