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12 terms

Final Exam Vocabulary-Science Ch. 9: Energy

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energy
the capacity to do work
mechanical energy
the amount of work an object can do because of the object's kinetic and potential energies
electro-magnetic energy
Forms of energy that travels through space in the form of waves.
e.g. visible light (sun) x-rays radio waves
law of conservation of energy
the law that states that energy cannot be created or destroyed but can be changed from one form to another
heat energy
energy released in the form of heat caused by the motion of moving molecules and the breaking of chemical bonds
nuclear energy
energy from nuclear fusion(the combination of the nuclei of small atoms to form a larger nucleus;releases energy or nuclear fission(the splitting of the nucleus of a large atom into two or more fragments;releases additional neutrons and energy)
energy conversion
a change from one form of energy to another
kinetic energy
the energy an object has due to its motion
heat engine
a machine that transforms heat into mechanical energy, or work
potential energy
the energy that an object has because of the position, shape, or condition of the object
joule
the unit used to express energy;equivalent to the amount of work done by a force of 1 N acting through a distance of 1 m in the direction of the force (symbol, J)
chemical energy
Energy stored in the chemical bonds of molecules; a form of potential energy.