1 / 39

What is Energy?

What is Energy?. Mrs. Wisher Earth Science. What is Energy?. The ability to produce change or make things move Energy can produce Light Heat Motion Sound Growth Technology . Can you make things move?. Then you have energy… …but there are different forms and types of energy….

conor
Télécharger la présentation

What is Energy?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. What is Energy? Mrs. Wisher Earth Science

  2. What is Energy? • The ability to produce change or make things move • Energy can produce • Light • Heat • Motion • Sound • Growth • Technology

  3. Can you make things move? • Then you have energy… • …but there are different forms and types of energy…

  4. Forms of Energy • Kinectic • The energy of motion • Electrical, Radiant, Thermal, Sound, and Mechanical are forms of kinetic energy • Potential • Stored energy and energy of position • Chemical & Nuclear energy are potential energy

  5. Chemical Energy • What holds atoms in molecules together • is released by chemical reactions like burning wood • Biomass, petroleum, and natural gas are examples of stored chemical energy

  6. Nuclear Energy • Energy stored in the nucleus of an atom • Holds protons and neutrons together in an atom’s nucleus • Powers the sun and nuclear power plants

  7. Electrical Energy • The movement of electrons through matter • Electricity & lightning are forms of electrical energy

  8. Thermal Energy • The random motion or vibration of atoms in matter • The faster the atoms vibrate the more heat energy they have • Geothermal energy is an example of thermal energy

  9. Radiant Energy • The energy carried by waves • Light and solar are types of radiant energy

  10. Discussion • Turn to your partner and discuss the difference between kinetic & potential energy

  11. Mechanical Energy • The energy of an object moving from one place to another • Wind energy is a mechanical energy • When you ride a bike you use mechanical energy

  12. Sound Energy • The movement of energy through waves • The air molecules move tiny bones in your ear • The message of sound then moves to your brain • Can also vibrate objects

  13. Energy can be changed from one form to another • Chemical energy in gasoline is changed to heat energy and then to mechanical energy in a car

  14. Sources of Energy • Renewable • Supplies are replenished frequently • Biomass, geothermal, hydropower, solar and wind • Nonrenewable • Can not be replenished within a short time • Coal, petroleum, uranium, & natural gas are examples.

  15. Petroleum • is refined into gasoline • Number one energy source in the U.S. • Provides 37% of America’s total energy consumption. • Saudia Arabia has the largest known reserves of me. • My major use is for transportation.

  16. Coal • I generate 45.9 percent of the nation’s electricity • I’m America’s most abundant source of energy • Wyoming, West Virginia & Kentucky are states that produce me.

  17. Natural Gas • I heat more than half of the nation’s homes. • I’m colorless and odorless. • Chemical name is methane. • Industry is my largest consumer in the U.S. • I’m a cleaner burning fossil fuel.

  18. Uranium • I’m the nation’s third leading source for generating electricity. • I’m presently being used in over 100 locations in the U.S. • I supply about 21% of U.S. electricity. • I was first used in 1957 to make electricity. • The U.S. leads the world in production of electricity from me.

  19. Hydroelectric Power • I supply 5-10% of U.S. electricity, depending on the amount of rainfall. • I’m limited to certain geographic areas of the U.S. • I provide 16% of the world’s electricity. • I’m being used in over 2,000 locations in the U.S. • My facilities can disrupt wildlife & fish populations.

  20. Biomass • Methane gas can be made from me. • Photosynthesis stores radiant energy in me. • I get my energy from wood, garbage, and agricultural wastes. • I can be used to generate electricity. • Ethanol can be made from me and used as a transportation fuel. • Burning me can produce air pollution.

  21. Geothermal • I produce less than one percent of U.S. Energy. • I’m used mainly in western states. • I can be used for home heating. • My energy comes from the Earth’s core. • My major use is the production of electricity. • I get my energy as a result of radioactive decay.

  22. Wind • Most of my electricity is from Texas, Iowa, & western states. • I convert my motion energy directly into electrical energy with no cost for the fuel. • I produce no air pollution. • My turbines operate about ¾ of the time. • I produce almost 2% of U.S. electricity. • I’m caused by uneven heating of the Earth’s surface.

  23. Solar • I’m not available at all hours of the day. • I can be converted directly into electricity using photovoltaic cells. • I’m great for water and home heating. • I work better in some parts of the country. • My energy is stored in fossil fuels. • I’m free to use, but you have to purchase and maintain my equipment.

  24. Discussion • In your notebook, write down 2 reasons why it is important to research renewable energy sources.

More Related