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

5.  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 is a form of energy caused by vibrating objects.  The louder a sound is, the more energy it has.

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

8.  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 is widely used because it can be easily transmitted through wires to the place it is needed.

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

11.  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.  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.  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 principle of 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.