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