What would happen to earth's radiative equilibrium temperature if cloud cover increased? how would seasonality be affected if earth's tilt increased to 75 degrees? it would change unpredictably. it would decrease. it would not change it would increase seasonality would hardly change. seasonality would increase. seasonality would decrease. there is no relationship between seasonality and the tilt of earth's axis. if earth's axis were tilted 90 degrees, at what latitudes would the tropics be found? what is the longest day of the year in the northern hemisphere? o on the equator only 66.5 degrees north to 66.5 degrees south 90 degrees north to 90 degrees south 23.5 degrees north to 23.5 degrees south march 21 june 21 december 21 february 2 why is the air's density greatest at sea level? o because evaporation from the oceans creates more water vapor, which increases air pressure because heavier and larger air molecules settle near earth's surface because only those air molecules that create air pressure are found near the surface because the weight of the atmosphere compresse the molecules most at the bottom of the atmosphere, which is near sea level