Matching Pairs ScienceOnline version Science by Margine Cascayan 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 Ionosphere Stratosphere Troposphere Ozone layer Exosphere 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 Troposphere Exosphere Stratosphere Ozone layer Ionosphere