Waves - Lesson 6 Quiz

What is sound?

• A type of light wave

• A mechanical wave that begins from a vibration

• A chemical reaction

• A form of electricity

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What does sound need to travel?

• A vacuum

• A source of heat

• A material (solid, liquid, or gas)

• A magnetic field

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Why can't sounds travel through a vacuum?

• Because sound waves are too weak

• Because there is no material for them to vibrate

• Because vacuums absorb all vibrations

• Because sound waves are only audible in air

Through which state of matter does sound travel the quickest?

• Liquid

• Gas

• Solid

• Plasma

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Why can whales communicate over huge distances in the ocean?

• Because sound travels faster in water than in air

• Because whales have special hearing abilities

• Because water amplifies sound waves

• Because the ocean has less noise pollution