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David Wetzel

Blue Sky - Why Not a Red Sky? - 7 views

www.teachscienceandmath.com/...blue-sky-why-not-a-red-sky

blue sky color science resources inquiry based red roygbiv of light sunlight wavelengths where do rainbow colors come from

shared by David Wetzel on 11 Mar 10 - Cached
  • David Wetzel on 11 Mar 10
     
    Students learn strategies for resolving misconceptions they may regarding why the sky is blue.
Iris Deters

8 weird ways to save the Earth - Cloud whitening (1) - CNNMoney.com - 5 views

money.cnn.com/...index.html

science

shared by Iris Deters on 23 Nov 09 - Cached
  • Turns out particles, in this case the salt in the sea mist, will cause clouds to become denser, reflecting more sunlight back into space and keeping the planet cooler.
  • The nove
  • t crossed the Atlantic. The mist towers are hollow and rotate in the wind, acting as sails. It can cross the Atlantic faster than a conventional sail boat and do so without a crew.
  • ...2 more annotations...
  • How it works: The idea here is to use satellite-guided sailing ships to crisscross the oceans, constantly spewing a fine stream of sea mist into the clouds
  • Each ship would cost $2 or $3 million, making the entire program cost just a few billion dollars.
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