Solid, Liquid, or Gas?

Front

What is a solid?

Back

A solid is a state of matter that has a fixed shape and fixed volume. The molecules in a solid are tightly packed together and do not flow.

Front

What is a liquid?

Back

A liquid is a state of matter that has a fixed volume but takes the shape of its container. The molecules in a liquid are less tightly packed than in a solid and can flow around each other.

Front

What is a gas?

Back

A gas is a state of matter that has no fixed shape or volume. The molecules in a gas are far apart and move freely, spreading out to fill the space available.

Front

What happens to water when it freezes?

Back

When water freezes, it changes from a liquid to a solid. The molecules slow down and arrange themselves in a fixed structure, forming ice.

Front

What happens to ice when it melts?

Back

When ice melts, it changes from a solid to a liquid. The molecules gain energy, move faster, and break free from their fixed positions.

Front

What is an example of a solid?

Back

An example of a solid is a rock, which has a fixed shape and volume.

Front

What is an example of a liquid?

Back

An example of a liquid is water, which takes the shape of its container.

Front

What is an example of a gas?

Back

An example of a gas is oxygen, which fills the space in a balloon.

Front

How do molecules behave in a solid?

Back

In a solid, molecules are closely packed together and vibrate in place, maintaining a fixed shape.

Front

How do molecules behave in a liquid?

Back

In a liquid, molecules are close together but can slide past one another, allowing the liquid to flow.