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| A disturbance that transfers energy from place to place |
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| A repeated up-and-down or back-and-forth motion causing a wave. |
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| When an object or a wave hits a surface through which it cannot pass, it bounces back. |
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| The bending of a wave when it enters a new medium caused by a change of speed of the wave. |
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| Waves produced by earthquakes. |
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| When light waves hit an object, the rays cause the object's atoms to move and give off heat. Darker objects heat up more than lighter- colored objects. |
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| Occurs when light bounces off an object in a variety of directions. This explains why the sky appears blue. |
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| This changes in light waves when light moves through different materials like glass. |
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| The substance some waves travel through. |
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