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