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Nature of Energy
Term | Definition |
---|---|
ENERGY | Ability to work |
POTENTIAL ENERGY | Energy an object is able to store because of its position i.e., a spring is pushed down, potential energy is stored in the cells |
KINETIC ENERGY | Any moving object able to do work i.e., when you walk or run—your body exhibits kinetic energy |
CONSERVATION OF ENERGY | Energy changes from one form to another Cannot be created or destroyed |
ENERGY TRANSFER | Ways in which energy transfers include Conduction, Convection, Radiation |
CONDUCTION | Energy transfer through objects/matter REQUIRES DIRECT contact i.e., The HEAT from the STOVE transfers TO the PAN |
CONVECTION | Energy Transfer OCCURS in a CIRCULAR motion Occurs in liquid and gas i.e., hot fluid rises; cooler fluid sinks (Water in a pan) |
RADIATION | Transfer of energy through WAVE, RAYS, PARTICLES Can travel through empty space Does not require matter |
ELECTROMAGNETIC SPECTRUM | Name given by scientist to the family of electromagnetic radiations; From radio waves to gamma rays |
DOPPLER EFFECT | Source of waves is moving Apparent change in wave length Squeezing (short) wave in front of moving source Stretching (long) wave behind moving source |
WAVE | Vibration or disturbance carrying energy i.e., Sound, light or seismic (earthquake or other tremors of the earth) waves |
WAVE INTERACTION | Reflection; Refraction, Diffraction, Interference |
REFLECTION | Bouncing back of light, heat, or sound AFTER hitting a surface |
REFRACTION | Bending of a light ray or energy wave Passing from one medium (air) into another (glass) Caused by changes in the speed of the wave |
DIFFRACTION | Bending of waves Passing around barriers in the path |
INTERFERENCE | Waves from 2 or more sources Travel through same medium at same time GAINS strength if precisely overlap WEAKENS and may cancel each other out |
TYPES OF ENERGY | Chemical; Electrical; Electromagnetic; Mechanical; Nuclear; Thermal |