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21 Cards in this Set
- Front
- Back
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What does reflection mean?
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Reflection is the light energy that bounces off of objects.
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What colors of light do we see?
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We see the colors of light that are reflected from an object.
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What does refraction mean?
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Refraction is the bending of light rays when they pass through an object.
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What is a lens?
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A lens is a piece of clear material that bends, or refracts light rays passing through it.
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What is a convex lens?
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A convex lens is thicker in the middle than at the edges.
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What happens when light passes through a convex lens?
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When light passes through a convex lens, the rays bend toward each other. It makes objects nearby look larger.
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What is a concave lens?
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A concave lens is thicker around the edges than in the middle.
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What happens when light passes through a concave lens?
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When light passes through a concave lens, the light rays bend away from each other. this makes distant objects seem like they are nearer and smaller.
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What is an electromagnetic wave?
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An electromagnetic wave in the form of light energy is produced when vibrating electrons inside atoms give off energy.
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How are sound waves carried?
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Sound waves are carried by vibrating matter.
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Can sound travel through matter and solids?
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Yes
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What determines the pitch of a sound?
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Pitch is determined by the speed with which sound waves move.
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What determines the volume of sound?
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The volume of sound is determined by measuring the strength of sound waves. The move molecules that are squeezed during compression the louder the sound is.
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Which part of the eye has cells that change light energy to nerve impulses?
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The retina is the part of the eye that has cells that change light energy to nerve impulses.
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What is a sound wave?
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A sound wave is a wave of energy moving through matter. Sound waves move molecules back and forth without carrying them along with a wave.
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Can sound travel in outer space?
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No, because there aren't any molecules for the sound wave to move back and forth.
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What is energy?
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Energy is the ability to cause changes in matter.
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What is Kinetic Energy?
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Kinetic Energy is the energy of motion.
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What is Potential Energy?
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Potential Energy is the energy an object has because of where it is or because of its condition.
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What is the Law of Conservation of Energy?
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The Law of Conservation of Energy says that energy cannot be created or destroyed.
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What is the transformation of energy?
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The Transformation of energy is the chnge of energy back an forth between Kinetic and potential energy.
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