Unit 7.1 Review

Front

What is solubility?

Back

Solubility is the ability of a substance to dissolve in another substance without changing its chemical identity.

Front

What is the main difference between physical and chemical changes?

Back

Physical changes only affect appearance, while chemical changes create new substances.

Front

What happens to water droplets on a cold glass?

Back

The water is changing from a gas to a liquid without altering its chemical makeup.

Front

Why is reacting with acids a chemical property?

Back

It causes a substance to change into new substances when it reacts with an acid.

Front

What happens to particles of a substance as it melts?

Back

The particles move farther apart.

Front

What is a physical property of matter?

Back

A characteristic of a substance that can be observed without changing its chemical composition.

Front

What is a chemical property of matter?

Back

A characteristic that can only be observed during a chemical reaction, resulting in a change of the substance.

Front

Give an example of a physical change.

Back

Melting ice is a physical change because it changes from solid to liquid without altering its chemical identity.

Front

Give an example of a chemical change.

Back

Burning wood is a chemical change because it transforms into ash and gases, creating new substances.

Front

What is the definition of a phase change?

Back

A phase change is a transition of matter from one state to another, such as solid to liquid or liquid to gas.