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Nature of Energy

TermDefinition
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
Created by: pj johnson