Chapter 2 Section 1 Life Science

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Chapter 2 Section 1 Life Science

• Waves and the Electromagnetic Spectrum.

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Key Terms for Chapter 2 Section 1

• Wave, energy, medium, vibration, crest, trough,
  amplitude, wavelength, frequency, hertz,
  electromagnetic wave, electromagnetic radiation,
  electromagnetic spectrum, visible light.

Hey, Albert! Dont you wonder what it would be
like to ride on a beam of light!
AlbertDude! I want to totally surf on a beam of
light! Its a particle and a wave at the same
time! Awesome
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How are Waves and Energy Related?

• A disturbance that carries energy from place to
  place is a wave.
• Energy is the ability to do work.
• Most waves travel through a medium. A medium is
  some type of material such as water (a liquid),
  air (a gas), the earths crust (a solid).

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How do Waves Transfer Energy?

• It takes energy to make a wave.
• A mechanical wave is formed when an energy source
  causes a medium to vibrate back and forth or up
  and down.

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What are the Four Properties of Waves?

• Amplitude The maximum distance between the
  highpoint (crest) to the low point (trough) of a
  wave.
• Wavelength The distance from crest to crest, or
  trough to trough.
• Frequency The number of complete waves that pass
  a certain point in a certain amount of time.
  Measured in Hertz (Hz).
• Speed Which is found by multiplying the
  frequency by the wavelength.

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Waves in Action
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What is an Electromagnetic Wave?

• An electromagnetic wave transfers electrical and
  magnetic energy.
• An electromagnetic wave does not need a medium.
• Electromagnetic waves travel 300,000 kilometers
  per second. That is the speed of light.

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What is the Electromagnetic Spectrum?

• The electromagnetic spectrum is all the
  frequencies including radio waves, infrared
  waves, visible light, ultraviolet rays, X-rays,
  and gamma rays.

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