| A | B |
|---|
| solar power | use of sunlight to generate electricity |
| hydroelectricity | electricity produced when the energy of falling water turns the blades of a turbine to produce electricity |
| nuclear power | the process of making electricity by using nuclear fission |
| geothermal | a form of power obtained from steam or hot water coming from within the earth's interior |
| fossil fuels | coal, oil, natural gas, and other fuels that are ancient remains of plants and animals and are used to produce electricity |
| wind power | using the wind to turn giant turbines to make electricity |
| generator | a machine that changes mechanical energy into electric energy |
| turbine | a large wheel that rotates when pushed by water, wind, or steam |
| nuclear fission | the splitting of an atomic nucleus to release energy. |
| nuclear fusion | creation of energy by joining the nuclei of two hydrogen atoms to form helium. |
| renewable | energy resources that can be replaced as they are used; for example, wood and solar energy. |
| nonrenewable | those energy sources that are not replaced by natural processes within a reasonable length of time |
| energy transformation | the process of changing one form of energy to another |
| inexhaustible | an energy source that will never run out, for example the sun |
| biomass | plant materials and animal waste used as fuel |
| natural gas | a gas, methane, usually found with petroleum, that can be burned to provide energy |
| global warming | increase in the average temperatures on Earth, blamed mainly on increased carbon dioxide in the atmosphere |
| energy | The ability to do work or cause change. |
| conduction | the direct transfer of heat from one substance to another substance that it is touching |
| convection | the transfer of thermal energy by the circulation or movement of a liquid or gas |
| radiation | energy that is radiated or transmitted in the form of rays or waves or particles |
| electrical energy | the energy of moving electric charges |
| light energy | energy in the form of moving waves of light |
| chemical energy | energy rerleased from chemical bonds |
