Light and Sound Study Guide

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Light and Sound Study Guide

• Mrs. Smith
• 2007

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Light Vocabulary

• Reflect- when light bounces off of another thing
• Refract- when light bends (through water, or a
  prism)
• Prism- water or a triangular piece of glass used
  to refract light. (raindrops are prisms, they
  form rainbows if the sun hits them just right.

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More Light Vocabulary

• Absorb- when light is taken in and held by
  another object (black shirt)
• Transparent- an object you can clearly see
  through (window)
• Translucent- an object you can see through, not
  clearly (fogged up mirror)
• Opaque- an object you CANNOT see through (a
  concrete wall)

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Important Information

• Light travels in waves.
• Light waves travel very fast.
• There are several sources of light
• The sun
• Flashlights
• The lights in our classroom
• And many others

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Important Information 2

• Light is made up of colors.
• For example a green shirt looks green because it
  reflects green light and absorbs all other
  colors.
• A black shirt absorbs all colors, reflecting
  none.
• A white shirt reflects all colors, reflecting
  white light.
• You can see the colors of light when it is
  refracted through a prism.

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Sound Vocabulary

• Sound- a wave of energy that you can hear
• Sound wave- a wave that carries sound that can be
  heard
• Vibrate to move back and forth very quickly
• Pitch- the highness or lowness of a sound

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Important Information

• Sound must have something to carry it (water,
  air, or solids)
• Sound waves move out in all directions, much like
  a ripple in the water.
• Sounds are caused by vibrations.
• Sounds can have different pitches, high or low,
  depending on how quickly the vibrating object is
  moving.

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Important Information 2

• Sound can be reflected, and when it is reflected
  it is called an echo.
• Sounds can be made by making objects vibrate like
  guitar strings, our vocal chords, or the skin of
  a drum. These types of vibrations are made by
  plucking, blowing air over or into, or striking.

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QUIZ

• Your quiz over the above information will be
  tomorrow (2-22-07)!!!
• STUDY!
• Students making less than a C on the test, will
  retake the test on Friday.