Front

What are the three states of matter?

Back

Solid, Liquid, Gas.

Front

What is a chemical change?

Back

A process where a new substance is formed with different properties than the original substance.

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 happens to particles in a gas?

Back

Particles are far apart and move freely, filling the container they are in.

Front

What happens to particles in a solid?

Back

Particles are closely packed together and vibrate in place.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.

Front

What is an exothermic reaction?

Back

A reaction that releases energy to its surroundings.

Front

How does temperature affect the rate of a chemical reaction?

Back

Lowering the temperature usually slows down a reaction.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in a new substance, while a physical change does not.

Front

What is an example of a chemical change?

Back

Rusting of iron.