Across
- 4. These remove carbon dioxide from the blood and replace it with oxygen
- 5. orbits the earth
- 7. When two or more elements combine in a chemical reaction they form a
- 10. Made of a solvent and a solute
- 11. A type of acid, hint: HCl
- 12. solids liquids and:
- 13. H2O
Down
- 1. The main source of energy on earth
- 2. Turns red litmus blue
- 3. These are found on the periodic table
- 6. An object used to look at very small objects
- 8. A body in motion stays in:
- 9. an object used to look at distant object
- 11. Pumps blood around the body