Unit 4 Vocabulary: Light & Sound

Form of energy that our eyes detect.

Waves travel in straight lines and can be absorbed, refracted, reflected, or allowed to pass through a medium.

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Answer explanation

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Match each term and definition.

• translucent

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• transparent

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• opaque

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The light traveling through one material bounces off of a different material. Allows us to see objects.

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Light traveling through a transparent material bends, or turns.

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​ (a)   are curved, transparent objects that use refraction to help us see things.

Examples: telescopes, microscopes, eyeglasses

• Lenses
• Slides
• Opaques

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Form of energy that is the result of vibrations.

Hint: Our ears are needed for this vocabulary word.

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Movement of matter in a back-and-forth motion.

A string on a guitar moves back and forth, or ______, quickly.

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Match each term and definition

• pitch

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• decibels

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• volume

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• frequency

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Sound that hits a hard surface and bounces back.

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The ability to cause change in matter. Also known as the ability to do work.

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