An energy source that is replenished (replaced) in a short period of time.
An energy source that cannot be replaced or would take thousands of years or more to replace.
Energy from organic (anything that was once living) matter
A solid fossil fuel formed in the earths crust from decomposed plant material
Energy that is from the heat from within the earth.
Energy from the force of moving water; can be used to make electricity with a hydroelectric dam.
Energy from a mixture of gases (mainly methane) that is fossil fuel.
A fossil fuel that is often called crude oil, or oil.
A energy rich fossil fuel gas that is related to petroleum and natural gas.
Energy from the sun
The energy that is released from the nucleus of the atom; the two types are fusion and fission
Has blades, that turn when the wind blows, that are attached to a generator that produces electricity
A fuel that is formed in Earth from plant or animal remains
A form of energy resulting from moving electron particles; a secondary source of energy because some other source of energy must be used to produce enough to be used.