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Thursday, Mar 13 th , 2014

Thursday, Mar 13 th , 2014. Did you know… The electric eel of South America  ( Electrophorus electricus ) can generate over 600 volts & can even paralyze a horse. The normal energy used by our brain is 0.1 calories per min, & could go up to 1.5 during activities such as puzzle-solving.

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Thursday, Mar 13 th , 2014

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  1. Thursday, Mar 13th, 2014 • Did you know… • The electric eel of South America (Electrophorus electricus) can generate over 600 volts & can even paralyze a horse. • The normal energy used by our brain is 0.1 calories per min, & could go up to 1.5 during activities such as puzzle-solving.

  2. Do Now: Mar 13th • True/False. The ozone layer is a positive thing b/c it blocks harmful UV light from reaching Earth’s surface. • What causes global warming? (Choose all that apply) • Depleting the ozone C. Reducing air pollution • Releasing carbon dioxide D. Deforestation • What is the Greenhouse Effect? • True/False. Traditional agriculture is better for the environment than organic agriculture. • What is deforestation?

  3. Global Climate • Average weather patterns for entire globe • Climate change (temp, precip, wind, etc.) occurs over extremely long time periods • During average human life, climates won’t significantly change

  4. Ozone Layer • O3 molecules • In stratosphere • 20 - 30 km (12 - 19 mi) above Earth’s surface • Shields life from harmful ultraviolet (UV) light from Sun • Easily depleted by free radicals

  5. Greenhouse Effect • Greenhouse gasesin atmosphere trap Sun’s energy • Water vapor (H2O) • Carbon dioxide (CO2) • Nitrous oxide (N2O) • Methane (CH4) • Pro: traps heat to keep Earth warm • W/o these gases Earth’s temp would be 60ºF colder • Con: too many gases = too much heat (global warming)

  6. Global Warming • Earth's average temp incr 1.4°F over past century • Will rise 2-11.5°F over next hundred yrs • Small changes in average temp = large/dangerous climate shifts • http://www.youtube.com/watch?v=oJAbATJCugs

  7. Could 6 Degrees Change the World? • http://www.youtube.com/watch?v=2_ZQRIsn2pA&feature=relmfu • http://www.youtube.com/watch?v=P-0_gDXqYeQ&NR=1&feature=fvwp • http://www.youtube.com/watch?v=6rdLu7wiZOE&NR=1&feature=fvwp • http://www.youtube.com/watch?v=skFrR3g4BRQ&NR=1&feature=fvwp • http://www.youtube.com/watch?v=7nRf2RTqANg&NR=1&feature=fvwp • http://www.youtube.com/watch?v=O8qmaAMK4cM&NR=1&feature=fvwp

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