What is the approximate dry adiabatic lapse rate per 100 meters?

The dry adiabatic lapse rate is the rate at which the temperature of a dry air parcel decreases as it ascends in the atmosphere, assuming no heat exchange with the surrounding environment. Typically, this rate is approximately 9.8 degrees Celsius per kilometer, which translates to about 1 degree Celsius for every 100 meters of ascent.

Selecting "Not 10 or 2" correctly acknowledges that the values of 10 and 2 degrees Celsius per 100 meters are not accurate representations of the dry adiabatic lapse rate. In contrast, while 10 degrees Celsius is too high and suggests a rate of 1 degree Celsius for every 10 meters, 2 degrees Celsius is also significantly lower than the approximate value. Understanding this rate is important for atmospheric processes, weather forecasting, and understanding how air masses behave in the atmosphere.