1. Waves and Everything 8Sf-8 Electromagnetism 4 th Quarter Compiled by Jack Graham May 2013

4. Before you Apply, Get an Application Directions Packet from Mr. Graham. Students may apply by June 7th, 2013 for SARA at the following address: or CLICK HERE!CLICK HERE! https://apps.dpi.pac.dodea.edu/Applications/survey306/Surveys/TakeSurvey.aspx?s=27C69E09B1E54A5EA40883C3EE0C01B3 It takes a long time to load… so please be patient.

5. Standard 8Sf: The student will demonstrate an understanding of the properties and behaviors of waves. (Physical Science) Essential Question: 8.What is the electromagnetic spectrum? Indicators: 8. Compare the wavelength and energy of waves in various parts of the electromagnetic spectrum (including visible light, infrared, and ultraviolet radiation).

10. http://wise.berkeley.edu/webapp/index.html

13. Electron Volts A convenient energy unit, particularly for atomic and nuclear processes, is the energy given to an electron by accelerating it through 1 volt of electric potential difference. If an electron starts from rest at the negative plate, then the electric field will do work eV on it, giving it that amount of kinetic energy when it strikes the positive plate. The work done on the charge is given by the charge times the voltage difference, which in this case is:energyatomicnuclearvoltelectric fieldkinetic energycharge The abbreviation for electron volt is eV. Energies in electron volts.

14. Energies in Electron Volts Room temperature thermal energy of a molecule................................................................0.04 eV Visible light photons.........................................................................................1.5-3.5 eV Energy for the dissociation of an NaCl molecule into Na + and Cl - ions:................ 4.2 eV Ionization energy of atomic hydrogen.................................................................13.6 eV Approximate energy of an electron striking a color television screen (CRT display)...........................................................................................................................20,000 eV High energy diagnostic medical x-ray photons............................200,000 eV (=0.2 MeV) Typical energies from nuclear decay: (1) gamma..................................................................................0-3 MeV (2) beta.......................................................................................0-3 MeV (3) alpha......................................................................................2-10 MeV Cosmic ray energies...........................................................1 MeV - 1000 TeV 1 MeV = 10 6 eV, 1 GeV = 10 9 eV, 1 TeV = 10 12 eV Definition of electron volt

16. Why are leafs green?

18. Standard 8Sf: The student will demonstrate an understanding of the properties and behaviors of waves. (Physical Science) Essential Question: 8.What is the electromagnetic spectrum? Indicators: 8. Compare the wavelength and energy of waves in various parts of the electromagnetic spectrum (including visible light, infrared, and ultraviolet radiation).

19. Final Project (Report) 1. Select any scientific topic we have considered in this semester (space, forces, waves) 2. Use on line sources from our library – not Google. 3. Find a recent experiment or research report of interest to you. 4. Design an experiment you can do to go one step farther or extend the research reported. 5. Students may work in groups, but reports must be individually done and unique from all others. 6. “Cut and Paste” is not allowed. 7. Summarize in your own words as if you were explaining to another 8 th grader. 8. Give step by step detail of what you will need and what you will do in your experiment. 9. Assume you have unlimited resources and access to any equipment you need. 10. Due 7 June 2013 NLT 1500 hours.