Question

What is insolation?

 Solar energy reaches earth in the form of short waves. This is called as Insolation.

2. What are the different processes of heat transfer in the atmosphere?

 Conduction -Heat is transferred to that part of the atmosphere close to the hot surface of the

earth.

 Convection-Heated air expands and rises up

 Advection-Horizontal transfer of heat through wind.

 Terrestrial Radiation-Heat is transferred from the surface of the earth to the outer space in the

form of long waves.

3. What is the difference between insolation and terrestrial radiation?

 Solar energy reaches earth in the form of short waves. This is called as Insolation.

 Heat is transferred from the surface of the earth to the outer space in the form of long waves.

4. Why does terrestrial radiation occur mostly at night?

 During daytime, there is net gain in energy due to radiation from Sun.While in the night, when

sunlight is absent, there is net loss in energy. The Earth's crust has limit to absorb an

energy.

Hence, Terrestrial radiation occur mostly at night.

5. What is heat budget?

 The balance between insolation and terrestrial radiation is called heat budget.

6. What do you meant by temperature? Which is the instrument used to measure temperature?

 Temperature is the degree of hotness of the atmosphere. Thermometer.

7. Why the maximum temperatures is being recorded at 2pm?

 Maximum temperature of the atmosphere is felt at about 2 in the afternoon because it takes

about two hours to heat the atmosphere by the terrestrial radiation.

8. What is the difference between diurnal range of temperature and daily mean temperature?

 The difference between the maximum and the minimum temperatures of a day is called

diurnal range of temperature.

Diurnal range of temperature = maximum temperature of the day – minimum temperature of the

day

 The average temperature of a day is termed 'daily mean temperature'.​

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