Question

define Mesosphere
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Answer 1

The mesosphere (; from Greek mesos"middle" and sphaira "sphere") is the layer of the Earth's atmosphere that is directly above the stratosphere and directly below the mesopause. In the mesosphere, temperature decreases as the altitude increases. The upper boundary of the mesosphere is the mesopause, which can be the coldest naturally occurring place on Earth with temperatures below −143 °C (−225 °F; 130 K). The exact upper and lower boundaries of the mesosphere vary with latitude and with season, but the lower boundary of the mesosphere is usually located at heights of about 50 kilometres (160,000 ft; 31 mi) above the Earth's surface and the mesopause is usually at heights near 100 kilometres (62 mi),except at middle and high latitudes in summer where it descends to heights of about 85 kilometres (53 mi; 279,000 ft).

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Answer 2

The part of the earth's atmosphere which lies between the stratosphere and Thermosphere in which temperture decreases with altitude to the atmosphere's absolute minimum.


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