Chemistry

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Across
  1. 3. An idea or guess that you can test
  2. 5. Anything that has weight and takes up space
  3. 7. Has 2 protons and 2 neutrons
  4. 8. A special quality or feature that something has
  5. 9. Greek word for circle
  6. 11. Has 2 hydrogen and 1 oxygen
  7. 13. Look at something carefully
Down
  1. 1. A part or piece that makes up something larger
  2. 2. A very small part of matter
  3. 4. The process of learning about how the world works
  4. 6. How hot or cold
  5. 10. Smallest element
  6. 12. Found in living things
  7. 14. Not a liquid or gas