Higher latitudes are not permanently frozen because of
Places at higher latitudes are colder because the Sun's rays are weaker there. Nearer to the poles, the Sun's rays have to travel a longer distance through Earth's atmosphere before they reach the ground.
The heat energy absorbed by a known area in a fixed time is determined with the help of an instrument called
The effects of absorption by the atmosphere are eliminated by finding the value of the solar constant at various altitudes of the sun on the same day.
The earth radiates energy to the atmosphere in:
This energy heats up the atmosphere from below.
The days are longest at
Thiruvananthapuram is nearer to the equator as compared to other places. Therefore, the days are longest at Thiruvananthapuram.
Insolation refers to ________
The energy received by the earth is known as incoming solar radiation, which in short is termed as insolation.
The envelop of the air is called _________
Atmosphere is a mixture of different gases and it envelopes the earth all round. It contains life-giving gases like oxygen for humans and animals and carbon dioxide for plants.
Differences in pressure on the earth surface causes:
Pressure differences cause winds.
The sun is vertically over head at noon on 21st June at
The sun can be directly overhead on June 21st when it is at the Tropic of Cancer, which is 23.5 degrees north of the equator. Similarly, the sun is only directly overhead at the winters solstice for locations on the Tropic of Capricorn, 23.5 degrees south of the equator. On the euqinoxes, both spring and autumn, the sun is only directly overhead at the equator.
Maximum insolation is received over the ____________
Sub-tropical deserts receive maximum amount of insolation because cloudiness is the least there.
What is Isotherm?
Isotherms are the lines joining places of equal temperature.