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