Across
- 4. Measure of energy conversion performance
- 6. Element reduced in clean energy systems
- 10. Machine that converts energy into electricity
- 12. Organic material used as fuel
- 13. Energy from heat within the Earth
- 15. Non-renewable fuel like coal or oil
- 16. Device that produces electricity
- 17. Traditional energy source causing pollution
Down
- 1. Network that distributes electricity
- 2. Power generated using moving air
- 3. Energy source that replenishes naturally
- 5. Natural source powering solar systems
- 7. Release of gases into the atmosphere
- 8. Resource use that doesn’t deplete over time
- 9. Device used to capture solar energy
- 11. Energy obtained from the sun
- 12. Stores electrical energy for later use
- 14. Electricity produced from flowing water