MATTER

• Has mass and takes up space

• Made of atoms: protons, neutrons, electrons

• “STUFF”

MIXTURE

• A combination of 2 or more substances that can be separated by physical means, – Chicken Soup– Rocky road Ice Cream– Soil

PURE SUBSTANCE

• Something that cannot be separated by physical means (sorting, filtering, heating, cooling), but can be separated by chemical means (burning, chemical reactions). ALWAYS HOMOGENOUS!– Gold– Table Salt

HOMOGENEOUS MIXTURE

• A mixture that has the same composition throughout.– UNOPENED can of soda– Pudding

HETEROGENEOUS MIXTURE

• A mixture in which the composition is not the same throughout.– Chicken Noodle Soup– Italian Salad Dressing

ELEMENT

• A substance made up of only one type of atom.– Silver (Ag)– Gold (Au)– Hydrogen (H)– Oxygen (O)

• An element is a pure substance that cannot be broken down into other substance by chemical or physical means.

• All matter is made from one or more elements.

COMPOUND

• A pure substance that is made of 2 or more elements– Table Salt (NaCl)

– Rock Salt (CaCl2)

– Hydrochloric Acid (HCl)