Why mountains r colder than the normal earth surface?

Answer 1

To answer this question you must first understand what temperature means - temperature is a measure of the energy of particles. Hot air has faster moving particles than cold air, so it has a higher temperature. When you climb higher through the atmosphere, air pressure decreases. Decreased air pressure means that the density of the air is lower (putting things under higher pressure increases their density). If density is lower, then that means there are fewer particles present. Fewer particles means less energy, hence a lower temperature.

So there are two ways to lower temperature, you can slow down the particles present, or you can take some particles out. Both would result in a decrease in the energy present. On another note, temperature actually INCREASES once you pass out of the troposphere (the lowest layer of the atmosphere). See the attached link for a graphical depiction of the change in temperature as you climb through our atmosphere.

Answer 2

We know the principle that air pressure decreases as altitude increases. As air goes up, the pressure decreases. It is this lower pressure at higher altitudes that causes the temperature to be colder on tthe mountains than the normal earth surface.

Answer 3

although warm air rises, the decrease in pressure associated with a rise in altitude causes the temperature to drop

Answer 4

because the warm air is heavier so it would most likely go to the "normal earth surface" as u called it,, while colder air is lighter and it settles on the higher areas of the athmosphere.