Science Challenge #8 Question 1. What is the gas (with molecules each made up of three oxygen atoms) that forms a layer in Earth's upper atmosphere and absorbs harmful ultraviolet radiation from the sun thus preventing it from reaching Earth's surface? Answer: OZONE (Not all the ultraviolet light is absorbed. Enough ultraviolet light penetrates the ozone layer to be potentially dangerous to many humans who allow themselves to be exposed to the sun for extended periods.) Correct responses received from: J. Higgins, Stephanie Pring, Jennifer LeBlanc, Peter and Merridy Hance, Sid Gospe, Jim Hohman, James Dewey, J. Blickenstaff, Jeanette Cox