The instrument used to measure temperature is called

The lines connecting the places receiving equal amount of temperature are called

The temperature is very low in

The angle of the incidence of the Sun's rays varies with the

The relative state of heat or coldness is called 

The length of the latitudes goes on decreasing towards the

The zones beyond the Arctic and Antarctic circles which surround the poles are known as

Diurnal range of temperature is also known as

Which one of the following zone is the coldest part of the Earth?

Polar winds are also called