Across
- 7. a machine for cutting grass
- 10. saving money
- 11. energy that is from natural processes
- 13. a strong material made by mixing cement
- 14. a barrier constructed to hold back water
- 17. a machine that converts power into motion.
- 20. electromagnetic wave of energy
- 21. a motor that makes electricity
- 22. design and construction of computers
- 23. A mechanical device has parts that move
- 24. Communication in video form
- 25. process of removing heat
Down
- 1. Heating,ventilation, and airconditioning
- 2. a device that replaces the heart
- 3. printing a 3-dimensional model
- 4. device for storing and processing data
- 5. Chilling foods
- 6. where multiple receivers are made
- 8. Groundwater
- 9. radioactivity materials
- 12. a turbine for generating electricity
- 15. protecting natural land
- 16. lowering water contamination
- 18. scooter motor
- 19. Packaging from renewable materials
- 22. a thin board containing an circuit