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