Renewable energy cross word puzzle.

4. A type of solar collector that heats up pipes with water to be stored in a water heater or turned into warm air.
6. A material that comes from or makes up a living organism.
8. A liquid fuel that comes from biomass sources.
11. A type of solar heating that uses technology to capture heat from the sun and distribute it throughout the house.
13. A type of energy that is generated through the movement of water.
15. A form of heat that is produced deep below the earth's surface because of high pressure combined with the breakdown of radioactive elements.
16. A type of solar power that uses mirrors to focus sunlight and generate electricity.
17. A group of wind turbines set to harvest air for electricity.

1. A type of solar cell that is directly powering electricity.
2. A process where water molecules are broken down into oxygen gas and hydrogen gas by an electric current that runs through the water.
3. A type of solar heating that collects heat from the sun during the day naturally and captures it at night with shades to save energy.
5. A device that converts the wind's kinetic energy into electrical energy.
7. A process that converts the thermal energy in water to electricity that people can use.
9. A type of pump that flows water through pipes underground to either cool or warm water based on the season.
10. A form of electricity that is generated by the combustion of biomass.
12. A type of cell that can generate electricity through hydrogen gas.
14. A type of energy that is generated from the movement of tidal water.