Question

Normal lapse rate is the average fall in temperature with altitude through

Answer 1

Lapse rate is the rate at which Earth's atmospheric temperature decreases with an increase in altitude, or increases with the decrease in altitude. [1][2] Lapse rate arises from the word lapse, in the sense of a gradual change.

Although this concept is most often applied to Earth's troposphere, lapse rate can be extended to any gravitationally supported parcel of gas.
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Answer 2

for every 116meters increase in altitude there is a fall of 1 degree celcius