Across
- 4. unit measure is meter (m)
- 11. use sunlight to power machines and to heat buildings
- 12. made of tiny particles held together by forces called bonds
- 13. need a wheel,post and axel
- 16. pulls you into earth
- 17. movement of a substance from one place to another
- 20. a device with few or no moving parts
- 22. motion of waves
- 24. 2 right object or bar that pipits around a fixed point
- 25. movement of electrons
- 26. stored energy
- 27. formed by dead plants and animals
- 30. gas liquid transfer
Down
- 1. uses the energy of flowing water
- 2. blowing air can spin turbines to produce electricity
- 3. the vibration or movement of atoms and molecules
- 5. lost of force little effort
- 6. supply is limited
- 7. unit measure is newton (n)
- 8. push or pull
- 9. there supply is unlimited
- 10. unit measure is joule (j) or Newton-meter(nm
- 14. the suns earths main source of energy
- 15. living or recently living organisms
- 18. slopping surface ramp or wedge
- 19. energy that travels in heat waves
- 21. reduce the amount of force needed to lift an object
- 23. stored in the bond of atoms and molecules
- 28. movement of energy through substances in waves
- 29. unit measure of when finding work