Final answer:
The temperature decreases as height increases in the atmosphere. The rate at which the temperature decreases with height is known as the environmental lapse rate (ELR).
Step-by-step explanation:
As per natural phenomena, the temperature decreases as height increases in the atmosphere. The rate at which the temperature decreases with height is known as the environmental lapse rate (ELR). The ELR is typically around 6.5 degrees Celsius per kilometer (or 3.57 degrees Fahrenheit per 1000 feet).
Using this information, we can easily calculate the temperature at a lower altitude based on the given temperature at a higher altitude. In this case, if the temperature is 50 degrees Fahrenheit at 6000 feet above sea level, the temperature at 3000 feet above sea level would be approximately 43 degrees Fahrenheit.