Across
- 3. fuel composed of ethanol and gasoline
- 5. type of use that involves using a resource for personal needs
- 7. description of the process of moving water or air using natural convection currents
- 8. using water to provide energy
- 10. type of energy from the sun that is heat energy
- 11. type of solar device that concentrates sunlight
- 13. energy derived from present-day photosynthesis
- 15. devise used to absorb solar energy
Down
- 1. type of cell that collects light energy
- 2. the process of changing one form of energy to another form
- 4. description of the process of moving water or air using a pump
- 6. source of energy on the sun
- 9. type of energy provided by temperatures in the earth
- 12. type of fuel formed from complex organic matter
- 14. major elemental component of photovoltaic cells