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| _______________ is a form of energy that travels through the air. |
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| The number of vibrations per second. |
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| The ___________________ is the wire inside the lightbulb. |
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| is the part of the elctromagnetic spectrum that humans can see. |
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| controls the flow of current by opening and closing the circuit. |
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| is the loudness of a sound. |
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| the bouncing of light from a surface. |
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| materials that do not allow light to pass through, |
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| some amount of light can pass through. |
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| materials that allow light to pass through. |
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Definition
| when light moves into a differnct material and bends. |
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Definition
| A curved transparent object that bends light. |
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Term
| What are 2 things a an electric circuit needs for current to flow? |
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Definition
| (1) a source of current. (2) The circuit needs to be complete. |
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Term
| three examples of transparent objects |
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Definition
| window panes, eyeglass lens, clear water |
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| three examples of transluscent objects |
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Definition
| lamp shades, frosted glasses, wax paper |
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| 3 examples of opaque objects |
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Definition
| basket balls, chalk boards, wooden desks |
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| has a vibration that is across the direction of the wave, forming an S shape. |
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Definition
| In a series circuit, the current has only one path to follow. |
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Definition
| matter that carries sound waves |
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Definition
| how low or how high a sound is. |
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Definition
| a back-and-forth movement of matter. |
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| A sound that bounces off a surface |
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Definition
| The current has more than one path to follow. |
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