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