Sound and Light Energy

Sound is a type of _______________

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What causes a sound?

• A vibration

• A medium

• A longitudinal wave

Select all the examples that show uses of light energy

• The sound coming out of a speaker

• The warmth you feel in a hot day

• Heating water by using the Sun's rays

• Using a flashlight when it is dark

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A solar cell is a __________________

• an electromagnetic radiation.

• device that uses light from the Sun to produce electricity.

• tiny particle of energy.

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What is a sound wave?

• A back and forth motion.

• The substance where sound travels.

• A wave that transfers energy.

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What is a medium?

• The substance where energy travels.

• A back and forth motion.

• It is matter.

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Select the media where sound can travel

• Solid

• Vacuum

• Liquid

• Gas

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Sound cannot travel in ____________

Light can travel __________________

• only with a medium.

• with or without a medium.

• only without a medium.

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What travels the fastest in vacuum?

• Sound

• Electricity

• Light