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