Across
- 2. something that you find out from experiments
- 4. something that needs to be solved
- 8. educated guess
- 10. testing an idea
Down
- 1. discovered gravity
- 3. discovered the law of levers and pullys
- 5. discovered laws of relativity
- 6. looking for information
- 7. a liquid we need to live
- 9. invented a theory of vision