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Vocabulary Words for Vocabulary Test 1.

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
What's energy?   A quantity that describes the capacity to do work; a source of usable power.  
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What's heat?   A form of energy resulting from the temperature difference between a system and its surroundings.  
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The energy possessed by a body because of its motion is what kind of energy?   Kinetic Energy.  
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The bouncing off or turning back of light, sound or heat from a surface is?   Reflection.  
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What's refraction?   A change in the direction of a wave that occurs as it passes from one medium to another of different densiy.  
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In any periodic function, the maximum absolute variation of the function is?   Amplitude.  
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What's conduction?   The transmission of heat through a medium and without the motion of the medium.  
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A fundamental principle stating energy cannot be created nor destroyed but only changed from one form to another is?   The Conservation of Energy.  
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What is the crest of a wave?   The peak or highest point of the wave.  
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What's efficiency?   The relative effectiveness of a system or device determined by comparing output to input.  
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Entropy is?   A measure of randomness or disorder of a closed system.  
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Frequency is the number of?   Cycles or waves per unit time.  
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Emission of energy in the form of rays or waves is?   Radiation.  
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What's thermal energy?   Internal energy found by adding the kinetic energy of particles making up a substance.  
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The through of the wave is?   The lowest point of the wave.  
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Vibration occurs when?   A repetitive movement around an equilibrium point.  
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What is wavelength?   The distance between crests of a wave.  
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