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