| A | B |
| energy | ability to do work, move |
| chemical energy | stored in chemical bonds |
| heat energy | internal motion and position of particles of matter |
| radiant energy | light - electromagnetic energy |
| mechanical energy | motion of matter - vibrational waves |
| electrical energy | travels as transverse waves |
| solar energy | from the sun |
| geothermal energy | from inside the earth |
| Law of conservation of energy | energy cannot be created or destroyed - only changed from one form to another |
| potential energy | stored - depends on position |
| kinetic energy | movement/motion |
| nonrenewable energy resources | fixed amount on earth - fossil fuels |
| fossil fuel | come from remains of ancient life - coal, oil, natural gas |
| solar collector | changes sun's energy to electricity |
| hydroelectricity | falling water |
| nuclear fusion | joining hydrogen nuclei - on sun |
| nuclear fission | splitting of uranium |
| renewable energy resources | biomass(wood), geothermal,sun, wind, hydroelectricity |