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