Question: what is the top layer of earth's atmosphere
Answer: Exosphere : 700 to 10,000 km ( 440 to 6,200 miles ) Thermosphere : 80 to 700 km ( 50 to 440 miles ) Mesosphere : 50 to 80 km ( 31 to 50 miles ) Stratosphere : 12 to 50 km ( 7 to 31 miles ) Troposphere : 0 to 12 km ( 0 to 7 miles )