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www.reference.com/science/energy-important-73da5c5f76049814

Life cannot exist without energy. Movement requires energy as well. Modern civilization depends on being able to harness and use energy effectively to generate electricity and to enable transportation.

www.reference.com/article/energy-made-3691a37980a55eb8

Energy cannot be created, according to the law of the conservation of energy, which was first published in an 1842 scientific article by the German Physicist Julius Mayer. Based on the same principle, energy cannot be destroyed either. In an isolated system, energy can be transformed from one form t

www.reference.com/article/gives-energy-ac0f271bbd2c4102

Foods that give you energy include whole grains, oatmeal, bananas, oranges, pasta, salmon, beans, almonds and yogurt. The key is to eat foods with complex carbohydrates that have a low-glycemic index because they release energy slower.

www.reference.com/science/three-types-energy-ad4ce3141434090f

More than three types of energy exist, but a few examples of energy types include mechanical, heat and electrical energy. These describe the energy of motion that does work, the energy of being pushed into motion by heat and the energy when electricity creates motion, light and heat.

www.reference.com/article/energy-created-30f5812656e1d642

About.com explains that the law of conservation of energy states that energy cannot be created or destroyed. Energy can only be changed from one form to another, and the total energy of a system always remains constant.

www.reference.com/article/definition-light-energy-8dc179a714dee1cd

Light energy refers to the energy carried by waves in the visible region of the electromagnetic (EM) spectrum. The EM spectrum is comprised of the entire range of electromagnetic radiation from radio waves all they way up to gamma rays.

www.reference.com/article/chemical-energy-a59ce932784ef533

Chemical energy is a type of energy that is stored in the bonds that form between different chemical compounds. These bonds exist between different types of atoms and molecules. The energy that is stored inside of these bonds can be released through a chemical reaction, which usually has a number of

www.reference.com/article/stored-energy-called-3a8c2ef874bbae2

Stored energy is most commonly referred to as potential energy, which has the potential to do work. Potential energy is also generally a result of gravity pulling down on an object and can be represented by the gravitational constant of g.

www.reference.com/article/definition-alternative-energy-e9ee853a2f73b62

Alternative energy is a substitute source of power that has equivalent or superior performance compared to existing technologies but do not exhaust fossil fuel or release carbon dioxide. These alternatives are renewable, readily available and ecological friendly.

www.reference.com/article/energy-flow-746d4974c6937347

According to the second law of thermodynamics, energy flows in the direction of increasing randomness. This randomness is quantified as entropy, a universal value that always increases due to the inescapable dissipation of energy.