Energy

What is energy? Energy is the droved from the Greek word "ἐνέργεια" - energeia which means "activity, operation", or from the word "ἐνεργός" - energos, " which means "active, working." There are many forms of energy such as:
- Thermal Energy (Heat)
- Chemical Energy
- Electrical Energy
- Radiant Energy
- Nuclear Energy
- Magnetic Energy
- Elastic Energy
- Sound Energy
- Mechanical Energy
- Light Energy


Thermal energy is associated with the loss or gain of energy that has to do with the change in temperature. Usually it is associated with any form of temperature except absolute zero since absolute zero has no energy whatsoever.
Chemical Energy has to with energy gained or loss given by the interaction between objects that form a chemical reaction. 
Electrical Energy has to do with electric energy being converted into other forms of energy, most likely heat.
Radiant Energy is the energy of electromagnetic waves.
Nuclear Energy has to do with energy that is gained or loss through nuclear reactions.
Magnetic Energy is basically the change in electric energy, since it causes a magnetic field.
Elastic Energy is the energy or work needed to compress or expand a spring of some sort.
Sound Energy is the vibrations that occur when something moves, which we perceive as sound.
Light Energy is the energy that gives off light. It can usually be tied in to heat energy since light causes heat.