Fox, William K. Standard Havens Research Corporation, Kansas City, Missouri.
Last reviewed:January 2017
Show previous versions
- Fossil fuels
- Crude petroleum
- Natural gas
- Nuclear energy
- Nuclear fission
- Nuclear fusion
- Solar energy
- Hydro energy
- Tidal energy
- Wind energy
- Ocean energy
- Geothermal energy
- Biomass energy
- Links to Primary Literature
- Additional Readings
Sources from which energy can be obtained to provide heat, light, and power. The term energy is used to describe an amount of work performed. There are two kinds of energy, kinetic energy, meaning work performed by the movement of matter, and potential energy, meaning work that is stored or at rest in matter. In the kinetic or potential state, energy takes on one of five forms: (1) Chemical energy results from changes in the chemical structure of substances, such as during combustion of fuel. (2) Electrical energy results from electrons and protons in motion in a stream called an electric current, or in temporary storage as in a battery or fuel cell. (3) Mechanical energy results from force applied or about to be applied to liquid, solid, or gaseous matter. (4) Thermal energy results from heat being applied to matter. (5) Nuclear fission is the splitting of the nucleus of an atom into two or more parts by collision with neutrons, with the consequent release of the force that binds protons and neutrons of the nucleus together. All living things on Earth depend on one or more of these forms of energy and must look to a wide variety of energy sources. See also: Battery; Chemical energy; Energy
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Its dedicated editorial team is led by Sagan Award winner John Rennie. Contributors include more than 9000 highly qualified scientists and 39 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 17,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information