Matter is anything that takes up space and has mass. All matter is made up of atoms.

The smallest unit of a chemical element.

One kind of material made of the same type of atom. There are 120 elements.

An organized list of all the elements that have been discovered by humans. Categories organize the elements according to the atom’s properties.

When two or more atoms join together. The two or more atoms can be the same or different.

Tell you how many atoms of each element are in that molecule.

Multiply the number of molecules you are making.

The process that plants do to make their own food.

The process that all living things do to break apart glucose to release energy for itself.