Relier Pairs ScienceVersion en ligne Science par Margine Cascayan 1 Prevent ultraviolet rays from reaching the atmosphere 2 Layer where jets fly 3 Higher layer in the atmosphere 4 Lowest layer in the atmosphere 5 Reflects radio waves Troposphere Exosphere Ionosphere Ozone layer Stratosphere 1 Lowest layer in the atmosphere 2 Prevent ultraviolet rays from reaching the atmosphere 3 Higher layer in the atmosphere 4 Reflects radio waves 5 Layer where jets fly Ionosphere Ozone layer Troposphere Stratosphere Exosphere