Across
- 3. working together
- 6. working together but someone is in charge
- 8. can touch
- 9. everyone agrees
- 10. system can't directly observe or easily understand
- 13. step where you test your problem
- 15. turns things on and off
Down
- 1. parts working together
- 2. information
- 3. drawing
- 4. where you see if your hypothesis was correct
- 5. tube
- 7. allows electricity to flow
- 11. represents the real thing
- 12. educated guess
- 14. look up information