Across
- 2. powers the whole world
- 4. step 3 of design process
- 7. something you do to learn about something
- 8. comes from the sun
- 9. plus
- 11. you do it to test a theory
- 13. you take away
- 14. you're on it everyday
- 15. you need it to breathe
Down
- 1. interaction of substances
- 3. has 7 steps
- 5. fix cars
- 6. art and technique
- 10. you need it to see
- 12. something you build to test