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Energy.

Energy. What is Energy?. Energy lets you do things. Another name for energy is? Energy in measured in? Joules (J). There are how many joules (J) in a kilojoule (kJ )? There are many types of energy you need to know about. Potential energy. Much of the energy around us is stored energy.

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Energy.

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  1. Energy.

  2. What is Energy? • Energy lets you do things. • Another name for energy is? • Energy in measured in? Joules (J). • There are how many joules (J) in a kilojoule (kJ)? • There are many types of energy you need to know about.

  3. Potential energy • Much of the energy around us is stored energy. • We notice it only when it changes to other forms. • It has the potential to do work, so it is called potential energy.

  4. Types of Energy. • 1. Light • 2. Sound • 3. Heat • 4. Nuclear • 5. Electrical • 6. Chemical potential • 7. Gravitational potential • 8. Kinetic • 9. Elastic potential

  5. Light energy • Burning chemicals, very hot objects, and stars all release light energy. • Plants use light energy from the sun for photosynthesis. • We use light energy for?

  6. Sound energy • Sound is a form of energy caused by vibrating objects. • The louder a sound is, the more energy it has.

  7. Heat energy • Heat energy is the type of energy hot objects have. • Taking away heat energy makes an object cooler.

  8. Nuclear energy • Energy stored inside atoms can be released as nuclear energy. • Energy released from uranium atoms is used in nuclear power stations. • Nuclear energy stored in hydrogen atoms is the source of the sun’s energy.

  9. Electrical energy • Electrical energy is widely used because it can be easily transmitted through wires to the place it is needed.

  10. Chemical potential energy • Energy can be stored in chemicals as chemical potential energy. • Fuels such as wood or petroland batteries store chemical energy. • Foods also contain chemical potential energy that can be used by our bodies.

  11. Gravitational potential energy • The energy something has when it is high up is gravitational potential energy. • Slides, roller coasters, bungee jumping and sky diving, all have gravitational potential energy at the top ready to be used.

  12. Kinetic energy • Any moving object has kinetic energy. • As a moving object slows down it loses kinetic energy. • Wind, moving cars and you running all have kinetic energy.

  13. Elastic potential energy • Stretching springs, elastic and rubber bands stores elastic potential energy that can be released. • Trampolines are good example of using elastic potential energy.

  14. The Principleof Conservation of Energy • The principleof conservation of energy says that, • 1. Energy can never be created or destroyed. • 2. Energy can be converted/transformed from one form to another. • 3. In an energy change the total amount of energy stays the same.

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