resources solar

Explains how geothermal energy, natural heat from inside the earth, can be used as a source of heat or to provide electricity.

Explains how the Sun, which is the ultimate source of all energy on earth, can be used to provide electricity and power.

Examines solar energy, its history, uses, advantages and disadvantages, and new developments in the field.

Describes how heat beneath Earth's surface and plants and animals can be used as sources of power, how using this power affects the environment, and what the future significance of geothermal power and bio-energy may be.

Describes wind energy and how it is generated and used. Includes a simple experiment.

Describes the hydrologic cycle and its importance to life on Earth.