Unit 2: The Atmosphere - The Evolution of the Atmosphere 0.0 / 5 ? Environmental Science/StudiesAtmosphereEvolution of the AtmosphereASAQA Created by: rosieevieCreated on: 01-11-13 21:33 Where did life first evolve? In the oceans 1 of 5 By which process was oxygen first released into the atmosphere? Photosynthesis 2 of 5 Ozone is made of how many oxygen atoms? Three 3 of 5 What sort of electromagnetic radiation split molecules of oxygen to form ozone? Ultraviolet 4 of 5 What is the purpose of the ozone layer? To block harmful UV radiation 5 of 5
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