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SSR

SSR. Finally! Those of you who are always reading during class…are allowed to read right now!!!. Science Tuesday, November 5 th (week 2). Day: 10hr 33min Rise-6:41 Set-5:15 Moon: waxing crescent, 5% illuminated Objectives: I will describe sound. Warm Up!.

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SSR

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  1. SSR Finally! Those of you who are always reading during class…are allowed to read right now!!!

  2. ScienceTuesday, November 5th (week 2) Day: 10hr 33min Rise-6:41 Set-5:15 Moon: waxing crescent, 5% illuminated Objectives: I will describe sound.

  3. Warm Up! Question: Draw and label the parts of a transverse wave.

  4. Important Information Due Today: Bellwork Week 1was due yesterday. Homework Tonight: Get your report card slip signed! Upcoming Events: Early Release on Friday

  5. Getting the Message As you listen, write down any information you can get from listening to the sound clips. http://science.education.nih.gov/supplements/nih3/hearing/activities/lesson1.htm

  6. Huh? • Why could you not understand what was being said in tracks 1-4? • What makes languages different?

  7. The Rhythm of Language

  8. Do You Hear What I Hear? Objectives: * be able to explain that loudness is related to the amplitude of the sound wave, while pitch is related to its frequency * understand the humans do not hear all pitches equally well; loudness must be increased to detect certain pitches http://science.education.nih.gov/supplements/nih3/hearing/activities/lesson3.htm

  9. Transverse Waves* • Crest- highest point on a wave • Amplitude- Volume of a wave (height of a wave) • As wave height increases, volume increases • Measured in Decibels • Trough- lowest point on a wave • Frequency- Pitch, high or low (length of a wave) • As wavelength increases, pitch decreases • Measured in Hertz

  10. Amplitude versus Frequency Amplitude • Which one will have the higher volume? Frequency • Which one will have the higher pitch?

  11. What can you hear? Decibels (dB): Volume • Normal Speech: 60dB • Library: 40dB • Close Whisper: 20dB • Jet Engine: 140dB • Loud Rock Music: 110dB • Subway Train: 100dB • Busy Street Traffic: 70dB • 120dB or above usually causes pain to the ear Hertz (Hz): Pitch • Young people can hear frequencies between 20-20,000 Hz • Dogs can hear frequencies that range from 67-45,000 Hz • As you age, your ability to hear high frequency sound decreases.

  12. Diagram of a Transverse Wave* CREST AMPLITUDE TROUGH WAVELENGTH

  13. Cool Waves! • http://paws.kettering.edu/~drussell/Demos/waves-intro/waves-intro.html • http://sunshine.chpc.utah.edu/labs/waves/wave_basics/waves.htm • http://paws.kettering.edu/~drussell/Demos/waves/wavemotion.html

  14. United Streaming • http://player.discoveryeducation.com/index.cfm?guidAssetId=75244603-66D0-4066-9608-85B309BD65FC&blnFromSearch=1&productcode=US • Then some PhET!

  15. Slinky, slinky!

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