Which of the following comparisons between air at sea level and at the top of Mount Everest is false?
1) Air pressure is higher at sea level than at the top of Mount Everest
2) Air density is higher at sea level than at the top of Mount Everest
3) Air temperature is higher at sea level than at the top of Mount Everest
4) Air humidity is higher at sea level than at the top of Mount Everest
