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Waves

Waves. Waves & Their Behavior. Essential Standard. 6.P.1Understand the properties of waves and the wavelike property of energy in earthquakes, light and sound waves. Clarifying Objective.

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Waves

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  1. Waves Waves & Their Behavior

  2. Essential Standard • 6.P.1Understand the properties of waves and the wavelike property of energy in earthquakes, light and sound waves.

  3. Clarifying Objective • 6.P .1.1 Compare the properties of waves to the wavelike property of energy in earthquakes, light and sound.

  4. Essential Questions • What are the 5 PROPERTIES of waves? • What are waves? • What are the characteristics of Transversal Waves? • What are the characteristics of Longitudinal Waves? • What is a COMPRESSION in a wave? • What is a RAREFACTION in a wave?

  5. Waves • Waves are a disturbance or vibration a way of transferring ENERGY from one place to another • They transport ENERGY from on place to another • There are different categories & types of waves • They all have their own characteristics that make them waves

  6. Essential Questions • Get with a partner and answer… • What are waves?

  7. Crest & Trough of Waves • The CREST of the wave is the top of the wave • The TROUGH of the wave is the bottom of the wave • Energy moves through crests and troughs from one place to another

  8. Categories of Waves • There are two categories of waves. All waves transfer energy through • Transversal movement • Longitudinal movement

  9. Transversal Waves • Transversal Waves are waves that make a perpendicular motion in the direction of the wave • An example would be an ocean wave moving towards the beach • http://www.youtube.com/watch?v=yd-G6KYwzvA • 0:56-2:47

  10. Longitudinal Waves • Longitudinal Waves are like pinball waves. These waves vibrate in the direction of the flow of energy • An example is a pinball machine • http://www.youtube.com/watch?v=yd-G6KYwzvA • 2:48-3:47

  11. Essential Questions • Get with a partner and answer… • What are the characteristics of Transversal Waves? • What are the characteristics of Longitudinal Waves?

  12. Types of Waves • There are 3 main types of waves. All waves fall into one of these types • Mechanical • Electromagnetic • Matter

  13. Mechanical Waves • Mechanical Waves are waves that require a solid, liquid or gas to move through • Transversal Waves • Longitudal Waves

  14. Electromagnetic Waves • Electromagnetic Waves are waves that wave through electromagnetic fields • These are the only waves that do not require a medium to travel through • Transversal Waves • http://www.youtube.com/watch?v=d50avTf0OLw • 4:00-4:34

  15. Properties of Waves • There are 5 different properties of a wave • Waves must have these things (properties) to be waves • Wavelength • Amplitude • Frequency • Speed • Period

  16. Wavelength • The Wavelength is the distance between crests of a wave • Distance between top of the wave to top of the next wave • http://www.youtube.com/watch?v=00OiptDj40w • 0:45-1:26

  17. Wave Amplitude • The Amplitude of a wave is the distance from the (middle of the wave to the top) or (the middle of the wave to the bottom • From middle to crest or from middle to trough • http://www.youtube.com/watch?v=00OiptDj40w • 1:29-2:38

  18. Wave Frequency • The Frequency of a wave is how many waves are in a given space • The more waves in the given space the higher the frequency • http://brianleewhite.com/2012/01/14/understanding-sound-waves-frequency-and-amplitude-video/ • 0:55-1:19

  19. Wave Speed • The Speed/Velocity of a wave is how far one wave travels in a given amount of time • An example would be if you took a stop watch and set it to 10 seconds and then measured with a ruler how far one wave moved. That would be the speed of the wave • How fast is the water carrying the individual wave in a given space

  20. Wave Period • Wave Period is the time it takes to move from one crest to the next crest • For example if you take a stopwatch and time the time it takes for your boat to move from the top of one wave to the top of the next wave you have your wave period • http://www.youtube.com/watch?v=mb2NGRjGIy0 • 0:40-1:00

  21. Essential Questions • Get with a partner and answer… • What are the 5 PROPERTIES of waves?

  22. Wave Particles • All waves are moving particles of matter/atoms • The particles of matter/atoms are either spread far apart or in close together depending what part of the wave the matter is in • Compression • Rarefaction

  23. Compression • Compression is when the particles are pressed very close together • If you look at the picture to the right compression is marked by (Y)

  24. Rarefaction • Rarefaction occurs when the particles are far apart from each other • If you look at the picture to the right Rarefaction is marked by (X)

  25. Essential Questions • Get with a partner and answer… • What is a COMPRESSION in a wave? • What is a RAREFACTION in a wave?

  26. Waves Video • http://www.youtube.com/watch?v=_pcsOG-H3Ac • 11:00-12:02

  27. Important Points • Crest is the top of a wave • Trough is the bottom of a wave • Transversal waves are up & down hills • Longitudinal waves are like a coiled spring • Mechanical Waves must pass through a medium (solid, liquid or gas) • Electromagnetic Waves do not have to pass through a medium (pass through a vacuum) • Compression is when particles in a wave are CLOSE together • Rarefaction is when particles are FAR APART • There are 5 properties of waves • Wavelength • Amplitude • Frequency • Speed • Period

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