Science

What is a mixture?

Different substances mixed together

Compound

A compound is a pure substance made up of two or more different elements that are chemically joined together

Element

An element is a pure substance made up of only one type of atom.

pure substance

A pure substance is a substance made up of only one type of particle.

impure substance?

Two or more types of particles

Homogeneous mixture

A mixture that is evenly mixed throughout, so you cannot easily see the different substances.
Example: Salt water, air

Heterogeneous mixture

A mixture that is not evenly mixed, so you can see different parts or substances.

Example: Oil and water, salad

Phases of the moon

New moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent