Create a custom practice set
Pick category, difficulty, number of questions, and time limit. Start instantly with your own quiz.
Generate QuizGK Question
The mesosphere is the coldest layer of the atmosphere.
- True
- False
Answer: True
The mesosphere (50-85 km altitude) is the coldest atmospheric layer, with temperatures dropping to -90°C. Meteors burn up in this layer due to friction. Above it lies the thermosphere, where temperatures rise due to solar radiation absorption.