Across
- 4. total mass of organisms in a given area
- 7. diode conducting visible light into direct current (DC)
- 8. Energy made by the heat of Earth's crust
- 10. uses electronic equipment to enhance conversion of solar energy
- 11. central area that pulls up year round heat from the ground
- 12. An area with a group of windmills
- 13. A large turbine spun to create electricity
Down
- 1. sun energy to heat living spaces
- 2. hydroelectric power
- 3. A cell producing an electrical current directly from a chemical composition
- 5. The energy obtained from waves or specifically tidal
- 6. Chemical decomposition by passing an electrical current through a liquid or solution full of ions
- 9. a fuel derived directly from living matter