Question

.
3. Which layer separates the thermosphere
from the mesosphere?​

Answer 1

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$\implies$Mesopause.

$\implies$The mesopause, at an altitude of 80–90 km (50–56 mi), separates the mesosphere from the thermosphere—the second-outermost layer of Earth's atmosphere.

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Answer 2

Answer:

Atmoshpere

Explanation:

the mesophere at an altitude of 80-90km (50-56), seperates the mesophere from the thermosphere the second outer layer of earth is atmosphere