Physical Science - Chapter 10

What does the number of vibrations per second of a sound wave determine?

• its pitch

• its frequency

• its volume

Which use of sound waves depends on the fact that sound waves are reflected?

• ultrasound

• sonar

• both ultrasound and sonar

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Which worker would most likely have damage in his or her ears?

• office worker (40-60 decibels)

• technician that loads planes (155 decibels)

• teenager who listens to loud music (90-100 decibels)

Which statement describes light correctly?

• Light has properties of both waves and particles

• Light travels more quickly than anything else does

• All of above

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Which device produces powerful light waves that are all the same and all lined up?

• prism

• laser

• x-ray

Sound is produced when matter ___, or moves quickly back and forth.

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Sound travels in ___, which are produced by vibrations.

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You can only hear sound when it travels through ___.

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Sound travels fastest through solids because the ___ of matter are closest together.

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___ carry sound more slowly than liquids or solids.