This post was written by educator Doug Levin. It’s Saturday morning, the sun is up, and I’m sitting here with a cup of hot tea looking out onto my tidal creek. The wind is blowing out of the west, but the tide is going out, emptying to the east. I know this through observation. The wind is pushing waves up the creek. At the same …
from National Geographic Education Blog http://bit.ly/2Xc1Iku
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