The following definitions come from -EERE Glossary.
Renewable energy is derived from resources that are regenerative or for all practical purposes can not be depleted. Types of renewable energy resources include moving water (hydro, tidal and wave power), thermal gradients in ocean water, biomass, geothermal energy, solar energy, and wind energy. Municipal solid waste (MSW) is also considered to be a renewable energy resource.
Biomass Energy is produced by the conversion of biomass directly to heat or to a liquid or gas that can be converted to energy.
Geothermal Energy is produced by the internal heat of the earth; geothermal heat sources include: hydrothermal convective systems; pressurized water reservoirs; hot dry rocks; manual gradients; and magma. Geothermal energy can be used directly for heating or to produce electric power.
Solar energy is electromagnetic energy transmitted from the sun (solar radiation).
Wind Energy is available from the movement of the wind across a landscape caused by the heating of the atmosphere, earth, and oceans by the sun.