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Igniter 10/31: Open textbook to page 454 and preview Chapter 14. Remember what to look for:

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Igniter 10/31: Open textbook to page 454 and preview Chapter 14. Remember what to look for: Introduction Paragraph Read captions Look at Pictures Look at Diagrams Read Headings Read Sub-headings Scan Bold words Guide for reading Questions

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Igniter 10/31:

  • Open textbook to page 454 and preview Chapter 14.
  • Remember what to look for:
      • Introduction Paragraph
      • Read captions
      • Look at Pictures
      • Look at Diagrams
      • Read Headings
      • Read Sub-headings
      • Scan Bold words
      • Guide for reading Questions
      • Checkpoint questions/End of Sect review questions
what are waves
What are waves?
  • A wave is a disturbance that transfers energy from place to place
  • What is the cause of waves?
    • When a source of energy causes a medium to vibrate
    • What is a medium?
      • Material through which a wave travels i.e. water
      • Can be solid, liquid or gas
cause
Cause
  • When a source of energy causes a medium to vibrate.
    • Vibration is a back-and-forth or up-and-down motion
    • The motion is the source of the wave
  • Moving objects have energy  object can transfer energy to a medium creating a wave
what carries waves
What carries waves?
  • http://www.youtube.com/watch?v=7yPTa8qi5X8&feature=player_embedded
  • Most waves require something to travel through i.e. air or water
  • If waves require a medium to travel through they are called mechanical waves
wave types
Wave Types
  • Transverse Waves:
  • Move the medium at right angles in the direction in which the waves are travelling
  • Longitudinal Waves:
  • Moves particles of the medium parallel the direction that the waves are traveling
  • Combination of Waves:
  • Both transverse and longitudinal
    • Surface waves

http://www.kettering.edu/physics/drussell/Demos/waves/wavemotion.html

transverse waves
Transverse waves
  • Wave moves in one direction
  • Particles of the medium move across the direction of the wave
  • http://www.youtube.com/watch?v=UHcse1jJAto&feature=player_embedded
transverse waves cont
Transverse Waves Cont.
  • Parts of a wave:

Terms: crest, trough, wavelength, and amplitude

http://www.kirksville.k12.mo.us/khs/Teacher_Web/alternative/waves.html

longitudinal waves
Longitudinal Waves
  • Move the particles of a medium parallel to the direction the waves are travelling
  • Terms: Compression and rarefaction

http://www.kirksville.k12.mo.us/khs/Teacher_Web/alternative/waves.html

combination of waves
Combination of Waves
  • Combination of transverse and longitudinal waves
  • Occur at the surface between two mediums example: water and air
combination of waves1
Combination of Waves
  • Parts: crest and trough

http://adventure.howstuffworks.com/outdoor-activities/water-sports/surfing5.htm

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