Write the names 1 The energy stored in a body when it is stretched 2. The energy stored in a body when it raised to a height 3 The cells that utilize solar energy to produce electrical energy 4 Electric bulbs are a source of this energy 5. The energy that is produced by vibrations
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The energy we sense all around us seems to have many forms. Fires burn, rubber bands snap back, flashlights turn on and shine, objects fall, and things appear to be hot, cold, or just the right temperature. With so much going on, how can we figure out what forms of energy these things and events have? After hundreds of years of observation and experimentation, science has classified energy into two main forms: kinetic energy and potential energy. In addition, potential energy takes several forms of its own.
Kinetic energy is defined as the energy of a moving object. A thrown football, a speeding automobile, a marathon runner, or a rock falling from a cliff, are examples of objects that have kinetic energy.

Potential energy is defined as the energy associated with the arrangement of a system of objects that exert forces on one another. Potential energy is stored or released when the arrangement of the objects and/or the forces they exert on each other changes in some way. Systems of objects ranging from atoms to The chemical makeup (arrangement of molecules) of gasoline makes it a good fuel source. All nonliving and living things, from automobiles to zebras, are made up of molecules. It takes energy to make these molecules and hold them together. The energy stored in molecules is called chemical potential energy. During combustion, bonds are broken and reformed creating new products. The energy stored in gasoline is released by burning it (combustion). During combustion, chemical bonds are broken and reformed (changing gasoline into byproducts such as water and carbon dioxide) releasing energy. There are many examples of chemical potential energy being converted to kinetic energy to do work. The chemical energy in food is used by our bodies to move. In a lighted firecracker chemical energy is used to make a loud sound and to scatter pieces of the firecracker all over.
Elastic Potential Energy
A stretched rubber band has the potential to do work or change things. This form of energy is called elastic potential energy. It occurs when an object (such as our skin, a spring, a trampoline, or a rubber band) resists being stretched out of shape. The elastic potential energy in a rubber band can be used to do work. For example, toy airplanes fly when a rubber band untwists and spins a propeller. The elastic potential energy in the rubber band was converted into kinetic energy.
Electrical (Electromagnetic) Potential Energy
Electrical potential energy is present when positive and negative electric charges are separated from each other, as is a battery. When you turn on a device that is battery-operated, such as a flashlight or a toy, the electrical potential energy stored in the battery is converted into other forms of energy such as sound, mechanical motion, thermal energy, and light. For an electrical appliance you plug in, the electrical potential energy is maintained by a spinning generator of a power plant, hydroelectric dam, or a windmill. A solar cell stores electrical potential energy similar to a battery as long as the sun is shining on it.
Gravitational Potential Energy
When something is lifted, work is done on the object against the pull of gravity. This work is converted to a form of potential energy called gravitational potential energy. When the item falls towards Earth like an apple from a tree, gravitational potential energy is converted into kinetic energy.
Nuclear Potential Energy
Nuclear potential energy, or nuclear energy, is the energy found in the nuclei of atoms. The protons in a nucleus exert very strong repulsive forces on each other due to their positive charge. In turn, the neutrons that make up a nucleus exert very strong forces on the protons to keep them from flying apart. Splitting a large nucleus (nuclear fission) or combining small nuclei into a larger nucleus (nuclear fusion) overcomes these strong forces and releases energy as a result. The energy released by an individual nucleus is very small, but huge numbers of nuclei can release huge amounts of energy as evidenced by the energy produced by nuclear reactors (fission) and by the sun (nuclear fusion).
Thermal Energy
Thermal energy is due to the movement, and the kinetic energy associated with this movement, of molecules that make up an object or substance. All objects possess thermal energy (even cold ones) since they have a temperature above absolute zero. Evidence of thermal energy can be detected by measuring the temperature of an