Forms and Uses of Energy

Energy = ability to do work

Forms of energy:

1. Potential energy : stored energy due to a body's position or condition

•  Chemical potential energy : energy stored in fuels such as petrol and food that can be released through chemical reactions
• Gravitational potential energy : energy that an object has because of its position or location
• Elastic potential energy : energy an object has when it is stretched or compressed

     2. Kinetic energy : energy that a body has due to its motion
     3. Heat : energy that flows from a region of higher temperature to one at lower temperature
     4. Light : energy that enables us to see
     5. Sound : energy produced when objects vibrate
     6. Electricity : energy that results from the flow of charged particles  

Law of conservation of energy states that energy can't be created nor destroyed, but it can change from one form to another.

 >Renewable energy : energy that are unlimited
e.g solar energy, wind energy, and wave energy  

 >Non-renewable energy :energy that are limited