LayersSeries teasers are where you try to complete the sequence of a series of letters, numbers or objects.
What is the third letter in this series?
T, S, ?, T, E
These are the different layers of the atmosphere, from the layer that is closest to the earth, to the layer farthest from the earth.
T - Troposphere
S - Stratosphere
M - Mesosphere
T - Thermosphere
E - Exosphere
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