Warm-up 4-2-13 Write the Q

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Warm-up 4-2-13 Write the Q A

• 1. The distance between a wave's crest and its
  trough is known as its
• A. low tide measurement.
• B. water depth.
• C. wave height.
• D. wave length.
• 2- Which of these is one way that mechanical
  waves differ from electromagnetic waves?
• A. Mechanical waves require energy and
  electromagnetic waves do not.
• B. Mechanical waves require a medium and
  electromagnetic waves do not.
• C. Electromagnetic waves require a medium and
  mechanical waves do not.
• D. Mechanical waves transmit matter and
  electromagnetic waves transmit energy.

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• MYP Unit Question How are waves important to me
  and life on this planet By the way-can you hear
  me now?
• Area of Interaction Health and social
  interaction
• Learner Profile Inquirers
• S8P4. Students will explore the wave nature of
  sound and electromagnetic radiation.
• a. Identify the characteristics of
  electromagnetic and mechanical waves.
• EQ What is the electromagnetic spectrum?
• Learning Target Today I am learning about the
  electromagnetic spectrum because its waves are
  everywhere. ?
• Homework Update IAN notebook- Review Notes

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Agenda

• Opening
• Concept Map
• Work session
• Notes
• Closing
• Pop Tart Review

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OPENING

• Work with your table members to complete Concept
  Map

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Work Session

• Complete the CLOZED notes

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Characteristics of Electromagnetic Radiation
A. Produced by the motion of electrically
charged particles moving back and forth.
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Characteristics of Electromagnetic Radiaiton

• The charged particles are surrounded by
• Electric fields
• Magnetic fields

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Characteristics of Electromagnetic Radiaiton

1. Transverse waves
2. Do not require a medium

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Characteristics of Electromagnetic Radiaiton
d. All electromagnetic waves travel at
300,000,000 m/s in a vacuum
Nothing travels faster than the speed of light!
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Characteristics of Electromagnetic Radiaiton
e. Travels slower when passing through a medium
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Duel Nature of Electromagnetic Radiation

• Particle nature
• Travels in bundles of energy
• Bundles act like small particles
• Called photons

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Duel Nature of Electromagnetic Radiation
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Duel Nature of Electromagnetic Radiation

• Wave nature
• All electromagnetic waves travel at the same
  speed
• Frequency and wavelength are used to classify the
  waves in the electromagnetic spectrum

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Electromagnetic Spectrum
The electromagnetic spectrum is the complete
range of electromagnetic waves placed in order of
increasing frequency.
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Electromagnetic Spectrum
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Electromagnetic Spectrum
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Create your own Mnemonic device to remember the
Waves of the EM Spectrum

• Radio
• Microwave
• Infrared
• Visible Light
• Ultraviolet
• X-rays
• Gamma Rays

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RottenMilkIs VeryUndrinkableX-tinguishesGas

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Electromagnetic Spectrum

• As the frequency increases
• Wavelength decreases
• Photon penetrating energy increases

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Radio Waves

1. Uses Communication (telephones, , radio
   transmission, global positioning system (GPS)
2. Long wavelength and Low frequency
3. Lowest Photon energy

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Radio Waves
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Microwaves

1. Uses Cooking, cellular phones, radar
2. Long wavelength and Low frequency
3. Lower Photon energy

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Infrared Radiation

• Wavelength is only a little longer than visible
  light
• Uses Remote controls, thermal energy transfer
  (radiant energy) including night vision, infrared
  photography, locating tumors
• (Remember all living object give off infrared
  radiation.)

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Infrared Radiation
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Visible Radiation

1. Only wavelengths that can be detected by the
   human eye
2. Use allow humans to see

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Ultraviolet Radiation

1. Higher frequency and shorter wavelength than
   visible radiation
2. Uses Produces vitamin D in human skin and can be
   used to kill bacteria and viruses (sterilize
   equipment)
3. Warning! too much can cause skin cancer Ozone
   in the atmosphere blocks it

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X-rays

1. Higher frequency and photon energy greater
   penetrating power
2. Uses X-ray pictures rays will penetrate soft
   matter like skin and muscle, but it is absorbed
   by the harder bones

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Gamma Rays

1. Highest frequency -- greater penetrating power
2. Uses destroy human cells and can be used to
   kill cancerous cells

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Concept Map
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Pop Tart Review
Get ready!
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Pop Tart Review
What produces electromagnetic radiation?
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Pop Tart Review
What type of wave is electromagnetic radiation?
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Pop Tart Review
Name a wave that can travel faster than
electromagnetic radiation?
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Pop Tart Review
What is a photon?
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Pop Tart Review
Name the longest electromagnetic wave.
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Pop Tart Review
What name do we give to all the electromagnetic
waves arranged from longest wavelength to
shortest wavelength?
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Pop Tart Review
Name electromagnetic wave used to see a child in
a burning house.