Gravitational: Gravity, also called gravitation, is a force that exists among all material objects in the universe. For any two objects or particles having nonzero mass, the force of gravity tends to attract them toward each other. Nuclear: relating to the nucleus of an atom. Thermal: relating to heat. Chemical: relating to chemistry or the interactions of substances as studied in chemistry. Fuel: material such as coal, gas, or oil that is burned to produce heat or power. Gas: an air-like fluid substance which expands freely to fill any space available, irrespective of its quantity. Combustion: the process of burning something.
• Kinetic- Kinetic Energy is energy that is in motion. Moving water and wind are good examples of kinetic energy. Electricity is also kinetic energy because even though you can't see it happen, electricity involves electrons moving in conductors. • Chemical- A pure chemical compound is a chemical substance that is composed of a particular set of molecules or ions. Two or more elements combined into one substance through a chemical reaction form a chemical compound. All compounds are substances, but not all substances are compounds. • Potential- Potential energy is defined as mechanical energy, stored energy, or energy caused by its position. The energy that a ball has when perched at a top of a steep hill while it is about to roll down is an example of potential energy. • Elastic- Elasticity refers to the degree of responsiveness in supply or demand in relation to changes in price. If a curve is more elastic, then small changes in price will cause large changes in quantity consumed. If a curve is less elastic, then it will take large changes in price to effect a change in quantity consumed. • Sankey- Sankey diagrams summarise all the energy transfers taking place in a process. The thicker the line or arrow, the greater the amount of energy involved. This Sankey diagram for an electric lamp shows that most of the electrical energy is transferred as heat rather than light • Coal- a combustible black or dark brown rock consisting chiefly of carbonized plant matter, found mainly in underground seams and used as fuel. • Oil- a viscous liquid derived from petroleum, especially for use as a fuel or lubricant • Carbon Dioxide- a colourless, odourless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air (about 0.03 per cent) and is absorbed by plants in photosynthesis.