Why in high altitude the temperature is low.?
536458
The higher you go the thinner the air, if there is less air then there is less mass to hold the heat from the sun.
155061
The temperature must drop below freezing up in the atmosphere,  where there is a concentration of water vapor. Typically this is caused when a warm front (full of water) rolls over a cold front -- the drop in temperature condenses the water high up and it drops to the ground as snow. But it can also happen when a cold front moves over a lake (ie. lake-effect snow). This is seen in a place like Buffalo.
568737
the air is lower pressure at higher altitude which means it is thinner, so there is less oxygen. if they already have trouble getting enough oxygen, then they will have much more trouble.
404726
First, a high elevation on Earth is not that much closer to the sun than sea level is when you consider the great distance from Earth to the sun.\n\nThe temperature changes have to do with air pressure... there is less of an atmosphere to hold in the heat at a high elevation than there is at sea level.  You might notice that cities at high elevation also have widely varying temperatures between day and night.  Here it will warm up in the day easily without much atmosphere to reflect energy from the sun, but at night it's like just having a sheet over you--the heat escapes easily.  At sea level you will warm up more slowly but hold that heat in much longer because you have a giant blanket of atmosphere over you, and higher air pressure to maintain the heat.  \n\nAlso at sea level, if you are by the sea, you have the added effect of the ocean or sea keeping the air temperate (around the same temperature all the time) since water maintains it temperature better than the air.
750966
if its 98.6 outside, our body temperature will rise, causing us to sweat and dehydrate.\n\nWe need the temperature to be about 70 degrees to stay at a steady 98.6.\n\nWe need the outside temperature to be less than the body's temperature as the body's chemical reactions produce too much heat, so some heat needs to be lost.
867358
It's actually a play of words. It's not hot because of low pressure... is low pressure because it's hot.\n\nThe coldness of the north pole has nothing to do with altitude... it's more about the actual amount of energy it receives from the sun during the year. I believe you're mixing up a couple of concepts here.
468582
because on the mountains the air is more thin...duhh
438791
altitude.....higher altitude means lower air pressure.  Liquids, water included, vaporizes at lower temp when pressure lowers.  (a glass of water will boil at room temp in a vaccumn)
176083
Maybe the ground temperature is hotter. Its temperature doesn't count on outside factor. The sun is just 1 factor.
854869
The combination of high temperature and high relative humidity result in the lowering of the partial pressure of oxygen in the air to the point where breathing is noticeably more difficult.  This results in a feeling of heaviness in the chest  and arms, making you feel tired.\n\nBe very glad you are unfamiliar with sleet!  In Nebraska we get to enjoy both extremes.
804973
A fundamental axiom: cold air is heavier than warm air.\n\nThus, cold air sinks (like into a valley) and hot air rises.\n\nHowever, the temperature gradient (how temperature changes with increasing altitude) is negative.  This means air gets colder as altitude increases.  So what we have is cold air at altitude pushing down on warm air near ground level.\n\nThe warm air heat comes from the ground, which is heated by our Sun.  In summer, there is a lot more of that solar energy to heat the ground and lower air in the valley than in winter.  Thus, the valley air is warm.  In fact, the weight of the colder upper air contributes a little bit to the heat below because a gas under pressure does heat up.  But in winter, when there is far less solar energy and resulting heat, the naturally colder air above settles into the valley.  \n\nBoth the cold and warm air are more or less trapped in the valley because of the hills or mountains surrounding it.  Thus, the cold air stays colder because no warm air is blown from the surroundings into the valley.  And the warm air stays warmer because no cold air is blown into it.
314426
Hotter air rises when it is hotter than the air around it because it  it is less dense.Vise versa for cold air.
386103
The human body is adapted to be comfortable in temperatures lower than 37 degrees celcius (98.6 degrees F.). This is mostly due to the fact that the body gives off it's own heat - and quite a lot of it. (That is the only reason blankets work - they trap the heat your own body produces.) Our bodies need to give off this heat in order to function properly. This is why in higher temperatures, we are uncomfortable. The heightened outside temperature makes it more difficult for our bodies to get rid of the excess heat that they are producing.
71035
Not 100% sure. But I think its because the air inside isn't moving. The air inside is stationary, while it is continuously circulating outside, which causes changes in the temperature. IMHO
309749
Altitude -0.8° 58.2° -0.8°
30834
The air is not warmed directly by the sun's rays, but by infrared, or long-wave radiation from the earth. The sun's rays strike the earth, and are absorbed by the earth, which raises the temperature of the earth. The earth reradiates the energy at a wavelength dependent on the temperature of the earth. The air is able to absorb the earth radiation, and becomes warmer. At high altitudes, as on mountain tops, strong winds keep the air mixed, and prevent much rise in temperatures near the surface of the mountain.\n\nAs you go up in altitude from the surface of the earth, the air cools at a fixed rate. This is called the "lapse rate," and for unsaturated air, that rate is about 5 deg. C. for each thousand feet of altitude. For saturated air, the rate is about 3.5 deg.C. for each thousand feet of altitude.
941373
Within limits,as temperature increases,so does the amount of O2 released from the hemoglobin.Heat is a byproduct of the metabolic reations of all cells and the heat released by contracting muscle fibers tends to raise body temperature.Metabolically active cells require more O2 and liberate more acids and heat.The acids and heat, in turn, promote release of O2 from oxyhemoglobin(oxy binded with hemoglobin in blood).\n\nSo, increased in temperature caused the rate of respiration to increase too.Because O2 tends to be released from the hemoglobin compared to when the weather is cold.This explain why during fever,a person will breath faster than normal person.\nIn contrast,during hypothermia(lowered body temperature) cellular metabolism slows and the need for O2 is reduced,and more O2 remains bound to hemoglobin.\n\nPlease check my grammar too.Im sux with my grammar coz English is my 3rd language.So, please check it.Hope this helps ya!