Science

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