In the troposphere, the air temperature drops about 6.5 degrees Celsius on average for every 1 km increase in altitude.
In the troposphere, the air temperature drops about 6.5 degrees Celsius on average for every 1 km increase in altitude.
This means that as you go higher in the troposphere, the temperature gets colder. This trend continues until you reach the upper boundary of the troposphere, where the stratosphere begins. At that point, the temperature starts to increase again due to other factors like the absorption of UV radiation by ozone in the stratosphere.
So, the correct answer is C. drops about 6.5 degrees Celsius.