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


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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:

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Igniter 10 31 open textbook to page 454 and preview chapter 14 remember what to look for

  • 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


Igniter 10 31 open textbook to page 454 and preview chapter 14 remember what to look for

Bella the “Bunny”


Waves

Not that kind of wave!

Waves


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


Igniter 10 31 open textbook to page 454 and preview chapter 14 remember what to look for

http://envirogeo.blogspot.com/2009/12/wednesday-122.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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