Physical and Chemical Changes

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 a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is evidence of a physical change?

Back

Shape change, size change, or state change (like melting or freezing).

Front

What is a mixture?

Back

A combination of two or more different substances that retain their individual properties.

Front

What is a solution?

Back

A mixture formed when a solid is dissolved in a liquid.

Front

What happens to particles in a solid?

Back

They are closely packed together and move very slowly.

Front

What happens to particles in a liquid?

Back

They are close together but can move around each other, allowing liquids to flow.

Front

What happens to particles in a gas?

Back

They are far apart and move freely, filling the space available.

Front

What is an example of a physical change?

Back

Breaking a glass, melting ice, or cutting paper.

Front

What is an example of a chemical change?

Back

Burning wood, rusting iron, or baking a cake.