| A | B |
|---|
| fossil fuels | alternative energy sources are need to replace |
| floods | dams can cause these |
| electrolysis | process that breaks down water into gases |
| wind turbine | device that converts wind energy into electrical energy |
| hydrogen | simplest most abundant element |
| passive solar energy | greenhouses use this to keep plants warm |
| active solar heating | uses technology to collect and store energy from the sun |
| temperature gradient in the ocean | the OTEC method makes use of this |
| deep drilling | most common way to get access to geothermal energy |
| biodiesel | biofuel made from veg oil |
| nonpolluting | benefit of wind power |
| electricity | a fuel cell is a device used to produce this |
| ethanol | produced from fermentation of starches |
| concentrating solar power | uses mirrors to focus sunlight to generate elect. |
| store water | function of a reservoir behind a dam |
| electrical energy | wind turbines converts kinetic energy into |
| steam | turns the turbines in a geothermal power plant |
| methane | produced by decomposition |
| biomass energy | burning corncobs is an ex |
| metal plate | used to absorb heat in a flat-plate solar collector |
| wind | renewable energy growing the most rapidly |
| geysers | Iceland's power comes from this geologic feature |
| drastically changes ecosystem | disadvantage to hydropower |
