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# Energy Vocabulary

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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 Term
 Definition
reflection   the bouncing of sound or light off an object
frequency   the number of vibrations per second
pitch   how high or low a sound is
volume   the loudness or softness of a sound
amplify   to enlarge, expand or increase the volume of a sound
echo   a repetition of sound by the reflection of sound waves from a wall, mountain, or other obstructing surface.
vibration   the movement of sound waves through a gas, solid or liquid that creates sound
absorb   to take in or soak up
medium   a substance that occupies space like a solid, liquid or gas
sonar   a method or device used for locating objects underwater using sound waves
opaque   material that does NOT allow light to pass through
translucent   material allowing SOME light to pass through
transparent   material that allows light to pass through
refraction   the bending or breaking of light as it moves from one material to another
concave lens   a lens that is thicker at the edges than it is at the middle
convex lens   a lens that is thicker at the center than it is at the edges
kinetic energy   the energy of motion or moving
potential energy   the energy an object has because of its condition or position; stored energy
motion   the action of moving or changing places or positions
force   a push or pull upon an object resulting from the object's interaction with another object
friction   the force that happens when two things rub together
weight   a measurement of how heavy something is; a measure of a pull of gravity on an object
mass   the amount of matter or weight of an object
speed   a measurement of distance over time; how fast something travels
gravity   a force that pulls everything towards the center of the Earth
Newton's 1st Law - Law of Inertia   An object moving in a straight line will continue moving in a straight line, unless acted on by an outside force. Also an object at rest will remain at rest, unless acted upon by an outside force.
Newton's 2nd Law   Force will cause a change in the motion of an object. The change in motion depends on the amount of force and the mass of the object.
Newton's 3rd Law   For each action, there is an equal and opposite reaction.

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Created by: Anderson11