During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well.
Astronomy Pre-Test
Astronomy pre-test (multiple choice) I used to evaluate student knowledge before beginning our Astronomy unit for 9th/10th grade Earth Science class.
Copyright:
Courtesy of Jennifer Bergman
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none
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