1. Aka “pure susbtances”

2. MATTER Has mass and takes up space (volume). Made of atoms (proposed in ancient Greece, verified in the last 200 years). All solids, liquids, and gases are matter.

3. MIXTURE A combination of 2 or more substances that can be separated by physical means (sorting, filtering, heating, cooling) –Chicken Soup –Rocky road Ice Cream –Soil –Sugar water

4. PURE SUBSTANCE Cannot be separated by physical means (sorting, filtering, heating, cooling) All particles making it up are the same (either atoms or molecules) ALWAYS HOMOGENOUS! –Gold –Table Salt

5. HOMOGENEOUS MIXTURE A mixture that has the same composition throughout. Also called a solution. –UNOPENED can of soda –Alloys –Kool-Aid –Salt water

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

7. ELEMENT A substance made up of only one type of atom. Atoms are the smallest part of an element Each has a unique symbol. –Silver (Ag) –Gold (Au) –Hydrogen (H) –Oxygen (O)

8. COMPOUND A pure substance that is made of 2 or more elements chemically combined. Can only be separated by chemical means (burning, chemical reactions). Smallest part called a molecule. Each has a unique formula. –Table Salt (NaCl) –Rock Salt (CaCl 2 ) –Water (H 2 O)