What is Energy

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What is energy?
•    Merriam-Webster Definition  of Energy: a fundamental entity of nature that is transferred between parts of a system in the production of physical change within the system and usually regarded as the capacity for doing work
•    According to the Law of Conservation of Energy, energy cannot be created or destroyed, although it continually changes forms.
•    There are many different units for measuring energy.  The SI unit for measuring energy is Joules (j).
                http://www.unit-conversion.info/energy.html
•    Everything we do uses some form of energy.
                Example: Driving to work in a sedan consumes 3 MJ per passenger-mile traveled.

•    Everything we own and use, from the clothes we wear to the food we eat requires energy to manufacture or produce.

How Do we Make Energy?
Coal, Natural gas, and nuclear energy are used to make heat to convert liquid water to steam.  

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