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