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Waves. Includes: Water Sound Light Heat Earthquakes. Waves. 2. Wave = disturbance that transfers energy from place to place. 3. Waves & Energy. What carries waves? How do waves transfer energy? What causes waves?. MEDIUM. 3.1 What carries waves?. AIR.

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waves
Waves
  • Includes:
    • Water
    • Sound
    • Light
    • Heat
    • Earthquakes
waves1
Waves

2. Wave = disturbance that transfers energy from place to place

3 waves energy
3. Waves & Energy
  • What carries waves?
  • How do waves transfer energy?
  • What causes waves?
3 1 what carries waves

MEDIUM

3.1 What carries waves?

AIR

  • What do sound waves travel through?
  • What do water waves travel through?

WATER

  • Medium = substance or material that carries the wave (what the wave travels through)
  • 2. Mechanical wave = requires a medium to transfer energy
  • 3. Electromagnetic wave = doesn’t require a medium to travel through
3 2 how do waves transfer energy
3.2 How do waves transfer energy?

Particles in motion

Ex: Stadium

3 3 what causes waves
3.3 What causes waves?
  • Disturbances from energy

(wave in water, sound, movement)

question 1
Question #1

FALSE – particles only temporarily move

TRUE or FALSE?

In order for Shane to hear Sally, air molecules must move from the lips of Sally to the ears of John

question 2
Question #2
  • Every minute, ocean waves continue to splash onto the shore.
  • In tables, explain why the beach is not completely submerged with water and why the middle of the ocean has not yet been depleted of its water supply?
answer
Answer
  • Ocean waves don’t transfer water, they transfer ENERGY
  • The particles just oscillate back and forth
4 types of waves
4. Types of waves
  • Waves move through mediums in different ways

OR

4 1 transverse waves
4.1 Transverse Waves
  • Transverse waves = move the medium at right angles to the direction of the wave
  • OR
  • = move medium perpendicular to the direction of the wave
  • EX:
4 1 transverse waves continued
(4.1 Transverse Waves Continued)
  • Examples: heat waves, light waves, seismic (earthquake waves)
4 2 longitudinal waves
4.2 Longitudinal Waves
  • Longitudinal waves = move the medium parallel to the direction of the wave
  • Ex:
4 2 longitudinal waves continued
(4.2 Longitudinal Waves Continued)
  • Examples: sound, seismic waves (earthquake)
slide15

Particle motion

  • Wave animation
transverse wave
Transverse Wave

wavelength

Direction of wave 

amplitude

Resting point

key words for transverse
Key words for Transverse
  • Resting point
  • Amplitude
  • wavelength
electromagnetic vs mechanical
Electromagnetic vs. Mechanical
  • Electromagnetic waves do not need a medium to transfer the energy
  • Ex: Light, heat waves
  • Mechanical waves need particles (mediums) to transfer the energy
  • Ex: Sound, Earthquake waves
slide23

http://www.google.com/imgres?hl=en&sa=X&tbo=d&biw=1278&bih=593&tbm=isch&tbnid=B87U9RZ_AfXFsM:&imgrefurl=http://missionscience.nasa.gov/ems/02_anatomy.html&docid=ERyyLXsEaXywSM&imgurl=http://missionscience.nasa.gov/images/ems/emsAnatomy_mainContent_wave-movement.png&w=600&h=158&ei=8mmVUK-FBeizigKSj4GgAg&zoom=1&iact=hc&vpx=76&vpy=288&dur=472&hovh=82&hovw=312&tx=234&ty=46&sig=110393057380908509629&page=1&tbnh=65&tbnw=248&start=0&ndsp=17&ved=1t:429,r:6,s:0,i:93http://www.google.com/imgres?hl=en&sa=X&tbo=d&biw=1278&bih=593&tbm=isch&tbnid=B87U9RZ_AfXFsM:&imgrefurl=http://missionscience.nasa.gov/ems/02_anatomy.html&docid=ERyyLXsEaXywSM&imgurl=http://missionscience.nasa.gov/images/ems/emsAnatomy_mainContent_wave-movement.png&w=600&h=158&ei=8mmVUK-FBeizigKSj4GgAg&zoom=1&iact=hc&vpx=76&vpy=288&dur=472&hovh=82&hovw=312&tx=234&ty=46&sig=110393057380908509629&page=1&tbnh=65&tbnw=248&start=0&ndsp=17&ved=1t:429,r:6,s:0,i:93

  • http://www.kirksville.k12.mo.us/khs/teacher_web/alternative/transverse_wave.jpg
  • http://hyperphysics.phy-astr.gsu.edu/hbase/sound/imgsou/lwav2.gif
  • http://static.ddmcdn.com/gif/noise-canceling-headphone-8.jpg
  • http://scienceprep.org/images/waves.jpg
  • http://www.astarmathsandphysics.com/o_level_physics_notes/o_level_physics_notes_longitudinal_and_transverse_waves_html_m3d0975ac.gif
  • http://science-class.net/Notes/Images_8th_Notes/Longitudinal-Wave.gif