Matching Pairs ScienceOnline version Science by Margine Cascayan 1 Prevent ultraviolet rays from reaching the atmosphere 2 Higher layer in the atmosphere 3 Lowest layer in the atmosphere 4 Layer where jets fly 5 Reflects radio waves Exosphere Troposphere Ionosphere Stratosphere Ozone layer 1 Layer where jets fly 2 Higher layer in the atmosphere 3 Prevent ultraviolet rays from reaching the atmosphere 4 Reflects radio waves 5 Lowest layer in the atmosphere Exosphere Ionosphere Stratosphere Troposphere Ozone layer