Across
- 2. to do work or cause change
- 5. stairs or ramp
- 9. helps lift heavy things
- 10. spiral wedge
- 11. light we see
Down
- 1. the transfer of heat
- 3. air vibrations moving
- 4. moving parts
- 6. electrons moving in a complete circuit
- 7. a wheel and rope
- 8. a door stopper (triangle)