Question 1

Why can temperature of a place not be correctly explained only by incoming solar energy?

Accepted Answer

Because reflection emission moisture and heat transfer also affect it Local temperature is the result of net energy and surface processes. Exam tip: connect temperature with net balance.

Question 2

Which is the deepest understanding of the heat budget?

Accepted Answer

It is the balance of energy input transformation transfer and output in the Earth atmosphere system Heat budget is not only incoming energy but the account of the whole Earth atmosphere energy system. Exam tip: understand it as an integrated energy system.

Question 3

In the hundred unit heat budget if cloud reflection increases by five units and all other components remain same what happens to absorbed energy in the Earth system?

Accepted Answer

Absorbed energy will decrease by five units When reflection increases less energy enters the Earth system. In exams remember reflection and absorption as inversely related.

Question 4

If the albedo of Earths surface decreases which result is most likely in the heat budget?

Accepted Answer

Surface absorption may increase Low albedo means lower reflection and higher absorption. In exams link dark surfaces with more heating.

Question 5

In the hundred unit model what balances the sixty five units of absorbed energy over the long term?

Accepted Answer

Sixty five units of outgoing longwave energy Absorbed energy ultimately leaves as longwave energy. In exams remember sixty five units absorption with sixty five units emission.

Question 6

If the atmosphere receives fourteen units of solar energy and thirty four units of terrestrial energy what is its total emission to space?

Accepted Answer

Forty eight units Fourteen and thirty four units make forty eight units. In exams remember this sum for atmospheric emission.

Question 7

The seventeen units of energy going directly from the surface to space are most related to which concept?

Accepted Answer

Atmospheric window Through the atmospheric window some longwave energy escapes directly to space. In exams link seventeen units with direct terrestrial escape.

Question 8

If the atmospheric window becomes narrower what will happen to terrestrial energy escaping directly from the surface?

Accepted Answer

It will decrease When the window narrows direct escape of longwave energy decreases. In exams connect atmospheric window with direct outgoing radiation.

Question 9

Which change can increase Earths planetary albedo and reduce net solar absorption?

Accepted Answer

Increase in snow and cloud cover Snow and clouds send more solar energy back to space. In exams link high albedo with lower absorption.

Question 10

If snow cover decreases and darker land is exposed which feedback effect is possible?

Accepted Answer

Absorption may increase causing further warming A darker surface absorbs more energy due to lower albedo. In exams understand this as albedo feedback.

Question 11

Which option best shows the dual role of clouds in the heat budget?

Accepted Answer

They can reflect shortwave by day and counter radiate longwave at night Clouds affect both incoming and outgoing energy flows. In exams treat clouds as a dual role factor not one sided.

Question 12

If clouds are high during day and remain at night what effect can occur on daily temperature range?

Accepted Answer

Daily temperature range may decrease Clouds can lower daytime maximum and keep nighttime minimum higher. In exams remember clouds as reducing daily range.

Question 13

Under which condition is surface net radiation most likely to be positive?

Accepted Answer

Strong sunshine low albedo and fewer clouds Positive net radiation increases when incoming and absorbed energy are high. In exams check sunshine and absorption for net gain.

Question 14

Under which condition is net radiation most likely to be negative?

Accepted Answer

Clear night and strong terrestrial radiation At night there is no solar input and the surface keeps losing longwave energy. Link negative net radiation with night cooling.

Question 15

Why does uncontrolled extreme warming not occur in low latitudes despite energy surplus?

Accepted Answer

Atmosphere oceans and terrestrial radiation remove extra energy Surplus energy is transferred and emitted helping global balance. In exams understand low latitudes as heat source regions.

Question 16

Why does temperature not keep falling endlessly at high latitudes despite energy deficit?

Accepted Answer

Heat is transported from low latitudes Atmosphere and oceans carry heat to energy deficit regions. In exams link polar temperature with global heat transport.

Question 17

The contribution of ocean currents in the heat budget is related to which type of balance?

Accepted Answer

Latitudinal heat balance Ocean currents reduce energy contrast by taking warm water to cooler regions. Link currents with heat transport in exams.

Question 18

Why is atmospheric circulation necessary in the heat budget?

Accepted Answer

It redistributes energy through air masses Atmospheric circulation distributes heat by moving warm and cold air. In exams treat it as reducing energy inequality.

Question 19

Which change can create a long term energy surplus in the Earth system?

Accepted Answer

Absorbed energy remains continuously greater than outgoing energy Energy surplus forms when energy keeps accumulating in the Earth system. Link surplus with warming tendency in exams.

Question 20

What can long term energy deficit do to Earths average temperature?

Accepted Answer

It can lower the average temperature A long-term energy deficit means that the Earth system is emitting more energy to space than it is absorbing. Its stored heat then decreases, so the global average temperature can fall. Option B describes the opposite condition, an energy surplus, which can lead to warming. Exam tip: energy deficit indicates cooling, while energy surplus indicates warming.

Question 21

Increase in greenhouse gases directly affects which energy flow most in the heat budget?

Accepted Answer

Outgoing longwave terrestrial radiation Greenhouse gases absorb and re radiate longwave energy. In exams remember their effect on terrestrial radiation.

Question 22

If atmospheric water vapour decreases what effect is possible on the night heat budget?

Accepted Answer

Escape of longwave energy may increase With less water vapour absorption of terrestrial radiation can decrease. Treat water vapour as a night heat trapping gas in exams.

Question 23

Why does longwave emission increase when surface temperature rises in the heat budget?

Accepted Answer

A warmer surface radiates more energy As surface warms terrestrial energy emission increases. Remember the direct relation between temperature and outgoing energy.

Question 24

Why can the surface be called an energy conversion centre in the heat budget?

Accepted Answer

It absorbs shortwave solar energy and emits longwave terrestrial energy The surface receives solar energy and converts it into terrestrial radiation. Remember the sequence from shortwave to longwave in exams.

Question 25

If absorbed energy at the surface increases while atmospheric emission remains same what happens to energy balance?

Accepted Answer

Possibility of energy surplus will increase More absorption with same emission can accumulate energy in the system. In exams check both input and output for balance.

The heat budget of the earth

Practice questions

01 Why can temperature of a place not be correctly explained only by incoming solar energy?

02 Which is the deepest understanding of the heat budget?

03 In the hundred unit heat budget if cloud reflection increases by five units and all other components remain same what happens to absorbed energy in the Earth system?

04 If the albedo of Earths surface decreases which result is most likely in the heat budget?

05 In the hundred unit model what balances the sixty five units of absorbed energy over the long term?

06 If the atmosphere receives fourteen units of solar energy and thirty four units of terrestrial energy what is its total emission to space?

07 The seventeen units of energy going directly from the surface to space are most related to which concept?

08 If the atmospheric window becomes narrower what will happen to terrestrial energy escaping directly from the surface?

09 Which change can increase Earths planetary albedo and reduce net solar absorption?

10 If snow cover decreases and darker land is exposed which feedback effect is possible?

11 Which option best shows the dual role of clouds in the heat budget?

12 If clouds are high during day and remain at night what effect can occur on daily temperature range?

13 Under which condition is surface net radiation most likely to be positive?

14 Under which condition is net radiation most likely to be negative?

15 Why does uncontrolled extreme warming not occur in low latitudes despite energy surplus?

16 Why does temperature not keep falling endlessly at high latitudes despite energy deficit?

17 The contribution of ocean currents in the heat budget is related to which type of balance?

18 Why is atmospheric circulation necessary in the heat budget?

19 Which change can create a long term energy surplus in the Earth system?

20 What can long term energy deficit do to Earths average temperature?

21 Increase in greenhouse gases directly affects which energy flow most in the heat budget?

22 If atmospheric water vapour decreases what effect is possible on the night heat budget?

23 Why does longwave emission increase when surface temperature rises in the heat budget?

24 Why can the surface be called an energy conversion centre in the heat budget?

25 If absorbed energy at the surface increases while atmospheric emission remains same what happens to energy balance?

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