Physical and Chemical Changes

Front

What is a physical change?

Back

A physical change is a change in which no new substance is formed, and the change can often be reversed.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new substances with different properties.

Front

Why is ice melting considered a physical change?

Back

Nothing new was created; there was only a change in the state of matter.

Front

What happens to the molecules in a solid when it melts?

Back

The molecules gain energy and move apart, changing from a solid to a liquid.

Front

What is an example of a liquid turning into a gas?

Back

Boiling water is an example, where water (liquid) turns into steam (gas).

Front

What state of matter takes the shape of its container?

Back

Liquid.

Front

What state of matter always keeps its shape?

Back

Solid.

Front

True or False: The state of matter cannot be changed depending on whether heat is added or removed.

Back

False.

Front

What is evaporation?

Back

Evaporation is the process where liquid turns into gas, usually due to heat.

Front

What is condensation?

Back

Condensation is the process where gas turns into liquid, usually when cooled.