Ozone in the Upper Atmosphere Makes Life on Earth Possible [edit]. Ozone is a molecule composed of three oxygen atoms, (O 3). Ozone in the upper atmosphere absorbs high energy ultraviolet radiation (UV) coming from the Sun. This protects living things on Earth's surface from the Sun's most harmful rays.
In earth science, erosion is the action of exogenic processes (such as water flow or wind) which remove soil and rock from one location on the Earth's crust, then transport it to another location where it is deposited. Eroded sediment may be transported just a few millimetres, or for thousands of kilometres.
C2 the âfact of a good âquality or âsituation being âgradually âlost or âdestroyed: The âsurvey âreveals a âgradual erosion of the president's âpopularity and âsupport. (Definition of erosion from the Cambridge Advanced Learners Dictionary & Thesaurus Â© Cambridge University Press).