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The Plan… 15 April 2013

The Plan… 15 April 2013. New Seating Plan with “special” rules… Review 4.3 Light & Electromagnetic Spectrum I could have done a better job at this… Review outstanding Homework: CYU P. 143 & Worksheet 4.2 CYU P. 151 & Worksheet 4.3 NEW today… and for possible Homework CYU P. 163 #1-12

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The Plan… 15 April 2013

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  1. The Plan…15 April 2013 • New Seating Plan with “special” rules… • Review 4.3 Light & Electromagnetic Spectrum • I could have done a better job at this… • Review outstanding Homework: • CYU P. 143 & Worksheet 4.2 • CYU P. 151 & Worksheet 4.3 • NEW today… and for possible Homework • CYU P. 163 #1-12 • Tomorrow: Activity 4.9 • Remember Ch 3 Re-Tests start today! • Ch 4 Test THURSDAY! • I made a webpage!

  2. The Electromagnetic Spectrum • The Electromagnetic Spectrum contains a variety of energy transmissions found at differing wavelengths and frequencies. • Visible Light is found within the spectrum, with it being the only transmission visible to the human eye.

  3. The Parts of the Spectrum • Radio Waves: • Have the longest wavelength and the lowest frequency. • Used to transmit Radio & TV Signals as well as in MRI technology. • Microwaves: • While a “wave” of their own, microwaves are found within the Radio and Infrared Spectrum. • Microwaves have the have the shortest wavelength and highest frequency of the Radio waves. • Used in cooking food, telecommunications, and radar – specifically in tracking objects and forecasting weather. • Microwaves cause water particles in food to vibrate = heat. Bounce back of off items in regards to radar/doppler.

  4. The Spectrum Continues • Infrared Waves • Just on the outside of Microwaves, infrared waves are a heat producing wave. • Found in TV remotes, infrared cameras, and CD-ROM readers. • Next on the Spectrum is Visible Light • This includes ROY G BIV • This is the only part of the spectrum that we can see with our eyes

  5. Shorter wavelengths = more energy • Wavelengths that are shorter than visible light produce more energy • Next on the list is Ultraviolet Waves (UV) • This radiation is found in Sunlight • UV hitting your skin enables it to produce Vitamin D • Too much exposure can = cancer • Sunscreen can protect you from harmful UV radiation

  6. The end of the Spectrum • X-Rays • Shorter wavelength and higher frequency & energy output than UV Radiation. • Used to photograph teeth & bones • Gamma Rays • They are the result of a nuclear reaction • Used in radiation therapy to help kill cancer cells

  7. How you can remember the Spectrum • Radio • Microwave • Infrared Wave • Visible Light • Ultraviolet Waves • X Rays • Gamma Rays R M I V U X G

  8. Now its your turn to Review… • Worksheet 4.3 • CYU P. 163 #1-12 • For Tomorrow • Finish Activity 4.7 from Friday • Start to review for test(s) • Retests today • Ch 4 on Thursday • Webpage in a bit… • www.hillscience8.wikispaces.com

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