Chemical and Physical Changes

Front

What is a solid?

Back

A state of matter with a fixed shape and volume, where molecules are very close together.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, such as burning wood.

Front

What is a gas?

Back

A state of matter where attractive forces are too weak to keep molecules close together, allowing them to move freely and rapidly.

Front

What is a liquid?

Back

A state of matter that has a fixed volume but takes the shape of its container, with molecules that are close together but can move past one another.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is plasma?

Back

A state of matter similar to gas but with charged particles, often found in stars, including the sun.

Front

What happens to molecules in a solid?

Back

Molecules in a solid are tightly packed and vibrate in place.

Front

What happens to molecules in a liquid?

Back

Molecules in a liquid are close together but can slide past one another, allowing liquids to flow.

Front

What happens to molecules in a gas?

Back

Molecules in a gas are far apart and move freely and rapidly, filling the space available.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and smoke.