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Physical Science Unit B
Chapter 3, Lesson 2 Vocabulary
7
Science
5th Grade
04/07/2014

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Term
sound energy
Definition
energy of vibrations carried by air, water, or other matter
ex: when you listen to a rock band or shout to a friend
Term
radiant energy
Definition
energy that travels as waves and can move through empty space
ex: energy such as light, x-rays, and infrared rays
also--energy from the sun (a restaurant's heat light shines infrared rays on your food to keep it warm)
Term
electrical energy
Definition
energy carried by electricity
ex: when you play a tape
Term
mechanical energy
Definition
energy an object has due to its motion, position, or condition
ex: a person running, a bicycle stopped on top of a tall hill, and a wound spring in a windup toy
Term
nuclear energy
Definition
energy produced when an atom splits apart or when two atoms join to form one atom
Term
chemical energy
Definition
energy stored in the way atoms are connected to each other
ex: when your body changes your food, it releases the _________ energy stored in it. Your muscles use this energy when you run. Your body uses this energy for all life functions.
Term
thermal energy
Definition
energy of the movement of atoms and molecules
ex: The more rapidly the molecules move, the greater their _______ energy. When the _______ energy of a ice sculpture gets too great, the ice melts.
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