Energy Physics Science
In physics, energy is a fundamental quantity that every physical system possesses. Energy of physical system in a certain given state is defined as the amount of work (W) needed to change the state of the system from some initial position to a specific or final position. Energy is found in different forms: Kinetic energy: the energy of moving objects; Thermal energy: the energy associated with heat; Sound energy: the energy of compression waves; Electrical energy: the energy of moving charged particles; Potential Energy: the energy that an object has due to position; also known as stored energy; Chemical energy: the stored energy of chemical substances; Nuclear energy: the stored energy of the atomic nucleus and Radiant energy: the energy of electromagnetic waves, including light. Energy can be readily transformed from one form into another; for instance, using a battery to power an electrical heater converts chemical energy into electrical energy, which is then converted into thermal energy. Also, energy could be transformed in matter and vice versa as the theory of relativity states.
Top: Kids and Teens: School Time: Science: Physics: Energy
See Also:
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Get Energy Wise - Find out what energy is, how it's used, and how misuse is resulting in climate changes.
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Energy - Features stories about several related aspects, current and future energy demands, and ways to conserve energy.
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U.S. NRC: Students' Corner - Nuclear energy tutorial from the Nuclear Regulatory Commission. Includes nuclear background, reactor design, radiation, emergency planning, decommissioning and related issues.
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Learning About Fossil Fuels - Information from the U.S. Department of Energy about coal, oil, and natural gas.
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Powering a Generation of Change - Looks at the history of electric power.
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Contribution of Fusion to Sustainable Development - Tells what sustainable development is, and how nuclear fusion can help us reach that goal.
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Energy Quest - California Energy Commission's energy and environmental education site for students, parents, and teachers. Offers games, puzzles, and science projects on energy.
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Energy Story - Detailed guide explains what energy is and where it comes from.
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EnergyEd - Find out how electricity is made, learn about renewable energy, and take a virtual tour of a power station. Then take an on-line quiz to test your knowledge. An interactive site from Ergon Energy.
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Roofus' Solar and Efficient Neighborhood - Take Roofus' tour around an energy efficient home to find out how to be energy smart.
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Virtual Nuclear Tourist - Look at reasons to use nuclear power, and how it works.
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Energy and Science Projects - Contains several activities that deal with energy.
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The Energy Planet - Focuses on the historical background of energy and explains some of the types of energy that are used today.
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EIA Kids Page Energy Timelines - Shows and explains the milestones in the history of energy and their uses.
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Alliant Energy's PowerHouse - Learn about saving energy and using electricity and natural gas safely.
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Rocky Mountain Institute - How we get energy, and how we use it.
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Energy Information Administration Kids Page - Features various sections about energy including what it is and the forms it comes in. Find out how humans use energy through quizzes and a 'fun facts' section.
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Fossil Fuel Eco-Stat - Learn what fossil fuels are and where they come from.
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