Science Geek
Earth's Atmosphere
Ozone gas absorbs the harmful UV-B rays and helps protect humans. An informative presentation begins with the layers of the earth's atmosphere, the pressure and temperature in each of the layers, the ozone layer, the ozone cycle, and the...
Curated OER
The World's Last Great Wilderness (Antarctica)
It's a shame that there are no photographs in this presentation because the information is fascinating! Each identically fashioned slide contains bullet points of information about Antarctica that will enhance an earth science...