compare mid latitiudes n high latitudes. how r there diff. temperatures at mid latitudes?

Answer 1

The angle of incidence of the sun's rays at the earth's surface increases from the tropics towards the poles and therefore the amount of heat received on a given area diminishes in the same direction.Temperature is therefore normally highest in tropics and lowest in polar regions.The same reason is applicable if you move from middle latitudes to higher latitudes as it is a part of the above region.
There is however, a seasonal variation of temperature owing to the annual changes in the sun's declination between 23.5 degree N and 23.5 degree S. Not only is the inclination of the solar beam involved,but also the lengthening of the day in summer at higher latitudes compensates the reduction of intensity of insolation to some extent.
Snow is a good reflector of heat and a fairly good reflector of long wave radiation.Consequently,the temperature over snow surface tends to sink,to very low levels. Not only this,the incident solar radiation
may serve to melt the ice only,not raising its temperature at all above the freezing point.Hence,extremely low temperatures are therefore met over ice and snow over high latitudes particularly over poles.