| A | B |
|---|
| electrochemical | chemical energy is converted directly into electrical energy |
| conversion (in energy) | to change one type of energy into another |
| combustion engine | burn fossil fuels for power, contributes to pollution |
| fossil fuel | coal, gas, oil |
| pollution | leaving our carbon footprint on the Earth |
| efficiency | how much of the energy you get back that it stored in the fuel |
| battery | has a positively charged cathode and negatively charged anode |
| compress (verb) | to be pushed together (like hydrogen and oxygen) |
| storage capacity | how much something can hold |
| mass production | making many of the same item, typically on an assembly line |
| irrigation | bringing water to dry land areas |
| flood | dams are used to control flooding |
| accumulation | collection of water behind a dam |
| upstream | swimming in one direction toward the dam |
| reservoir | an artificial lake |
| aqueduct | water pipes leading away from the reservoir |
| hydroelectricity | harnessing heavy flow of water to convert motion into electricity |
| turbine | part of generator that turns |
| ecosystem | plants and other water life found in rivers |
| fish ladder | allow fish to get around the dams |
