Why may daytime temperature decrease when less energy reaches Earth's surface?
Correct answer: A
With less insolation the surface heats less. Exam tip: connect surface temperature with received insolation.
Geography
The heat budget of the earth
पृथ्वी का ऊष्मा बजट
Class 11 Geography explores the heat budget of the Earth as the balance between incoming solar radiation and outgoing terrestrial radiation. Students learn how the atmosphere, land, oceans, clouds, and ice reflect, absorb, store, and redistribute heat, and why the Earth’s average temperature remains broadly stable. The topic connects this balance with the greenhouse effect, latitudinal differences in heating, and the movement of heat through the atmosphere and oceans.
TOPIC PRACTICE
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Medium · Level 5
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- Surface absorption decreases
- Terrestrial radiation comes from the Sun
- Earth stops creating energy
- The atmosphere disappears
Medium · Level 5
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- The natural greenhouse effect keeps Earth warm enough for life
- The greenhouse effect blocks the Sun
- The greenhouse effect occurs only in oceans
- The greenhouse effect has no relation with temperature
Medium · Level 5
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- Scattering and reflection may increase
- The Sun's temperature will always decrease
- Earth's revolution will become faster
- Terrestrial radiation will stop forming
Medium · Level 5
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- Energy imbalance can cause temperature change
- Energy balance has no relation with temperature
- Only rivers change climate
- Solar radiation does not reach Earth
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- It retains part of incoming solar radiation within the atmosphere
- It moves Earth away from the Sun
- It sends all longwaves to the Moon
- It stops ocean currents
Medium · Level 5
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- Shortwave from Sun to Earth and longwave from Earth to space
- Shortwave from Earth to Sun and sound from Sun to Earth
- Longwave from Moon to Earth and rain from Earth to Sun
- Clouds from ocean to Sun and soil from Sun to Earth
Medium · Level 5
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- Energy is stored as latent heat during evaporation
- Moisture creates the Sun
- Moisture always makes albedo zero
- Moisture changes Earth's axis
Medium · Level 5
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- Pressure differences and winds
- Only rock layers
- Permanent calmness of seas
- End of solar energy
Medium · Level 5
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- Temperature range could become very large
- Temperature range will always remain zero
- Day and night will end
- The Sun will not give radiation
Medium · Level 5
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- On energy input and output remaining nearly equal
- Only on the number of mountains
- Only on length of rivers
- Only on population growth
Medium · Level 5
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- Black asphalt road
- Fresh snow
- White cloud
- Bright icy peak
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- Because some regions have heat surplus and others have heat deficit
- Because there is no radiation on Earth
- Because the Sun heats only the poles
- Because oceans are fixed rocks
Medium · Level 5
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- Low moisture and clear sky allow heat to gain and escape quickly
- The Sun does not rise there
- Clouds are always thick there
- Sand does not emit longwave radiation
Medium · Level 5
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- Because energy balance affects temperature pressure and winds
- Because it only tells population
- Because it tells soil age
- Because it only measures ocean depth
Medium · Level 5
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- Twenty seven units
- Two units
- Fourteen units
- Fifty one units
Medium · Level 5
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- Seventeen units
- Two units
- Forty eight units
- Sixty five units
Medium · Level 5
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- Six units
- Fifty one units
- Thirty four units
- Sixty five units
Medium · Level 5
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- One unit
- Two units
- Fourteen units
- Seventeen units
Medium · Level 5
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- It heats the surface and becomes the basis of terrestrial radiation
- It is completely reflected into space
- It is stored only in clouds
- It changes into sound energy
Medium · Level 5
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- The atmosphere also directly takes some incoming solar energy
- The atmosphere takes no energy
- Only the surface takes all energy
- The Moon heats the atmosphere
Medium · Level 5
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- Longwave terrestrial radiation
- Shortwave solar radiation
- Sound wave
- Ocean current
Medium · Level 5
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- Absorption of terrestrial longwave radiation
- Complete reflection of solar shortwaves
- Freezing of seawater
- Formation of mountains
Medium · Level 5
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- From fourteen units solar absorption and thirty four units terrestrial absorption
- From twenty seven units clouds and two units surface
- From seventeen units surface and six units scattering
- From fifty one units surface and thirty five units reflection
Medium · Level 5
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- By thirty five reflected seventeen direct and forty eight atmospheric energy
- By fifty one surface and fourteen atmospheric energy
- By twenty seven cloud and six scattering
- Only by sixty five absorbed energy
Medium · Level 5
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- Radiative balance
- Ocean salinity
- Wind direction
- Rainfall distribution
Why is it wrong to call the greenhouse effect completely harmful in the heat budget?
Correct answer: A
At a natural level it helps maintain balanced temperature. Exam tip: distinguish natural and enhanced greenhouse effect.
What may happen to solar radiation when atmospheric particles increase?
Correct answer: A
Particles can change the direction and amount of incoming radiation. Exam tip: connect aerosols with radiation modification.
Which idea is most useful for understanding the link between heat budget and climate change?
Correct answer: A
When the difference between incoming and outgoing energy changes temperature is affected. Exam tip: connect climate change with energy imbalance.
How is energy absorption by ozone in the stratosphere linked with the heat budget?
Correct answer: A
Ozone absorbs ultraviolet radiation and affects atmospheric energy balance. Exam tip: connect ozone with incoming radiation absorption.
Which option shows the correct direction in the heat budget?
Correct answer: A
Incoming radiation is solar shortwave and outgoing radiation is terrestrial longwave. Exam tip: remember direction and wavelength together.
Why is surface moisture important in the heat budget?
Correct answer: A
Part of energy over a wet surface is used in evaporation. Exam tip: connect moisture with latent heat process.
What is produced in the atmosphere due to unequal heat distribution in the heat budget?
Correct answer: A
Unequal heating creates pressure differences and winds. Exam tip: connect unequal heating with wind formation.
If there were no atmosphere what could happen to Earth's daily temperature range?
Correct answer: A
The atmosphere regulates heat and reduces extreme heating and cooling. Exam tip: understand atmosphere as a thermal blanket.
On what does Earth's long-term thermal balance in the heat budget depend?
Correct answer: A
Thermal balance exists when Earth emits nearly as much energy as it receives. Exam tip: connect long-term balance with input-output equality.
Which example shows low albedo and high absorption?
Correct answer: A
Black asphalt absorbs more solar energy and reflects less. Exam tip: also connect asphalt with urban heat.
Why is horizontal transfer of energy needed in the heat budget?
Correct answer: A
Atmosphere and oceans carry heat from surplus areas to deficit areas. Exam tip: connect horizontal transfer with global circulation.
Why can sandy deserts have a large day and night temperature range?
Correct answer: A
In dry and clear conditions heating by day and cooling by night are rapid. Exam tip: connect desert range with low humidity.
Why is studying the heat budget useful for both weather and climate?
Correct answer: A
Distribution of energy forms the basis of atmospheric conditions. Exam tip: treat heat budget as a foundation of weather and climate.
In the hundred unit heat budget about how much energy is considered reflected by clouds?
Correct answer: A
Clouds send the largest reflected share of incoming solar energy back to space. In exams remember cloud reflection as about twenty seven units.
In the hundred unit model about how much energy is reflected from Earths surface?
Correct answer: B
The part directly reflected by the surface is small in total reflection. In exams remember surface reflection as about two units.
About how many units of energy return due to atmospheric scattering?
Correct answer: A
Particles in the atmosphere scatter some solar energy back toward space. In exams remember scattering share as about six units.
If clouds return twenty seven units and atmosphere returns six units how much surface reflection completes total reflection of thirty five units?
Correct answer: B
Total reflection is thirty five units so after twenty seven and six the surface part is two units. In exams solve it by subtraction.
What is the main importance of fifty one units absorbed by Earths surface in the heat budget?
Correct answer: A
Surface absorption later becomes the basis for emission of longwave energy. In exams link fifty one units with surface heating.
What does absorption of fourteen units of solar energy in the atmosphere show?
Correct answer: A
A small but important part of solar energy is absorbed in the atmosphere itself. In exams take atmospheric absorption as fourteen units.
The seventeen units of energy going directly from Earths surface to space are in which form?
Correct answer: A
The surface emits absorbed energy as longwave terrestrial radiation. In exams link direct outgoing energy with longwave radiation.
The thirty four units absorbed by the atmosphere from the surface are linked with which process?
Correct answer: A
The atmosphere absorbs a large part of longwave energy emitted by the surface. In exams link thirty four units with atmospheric greenhouse absorption.
How are forty eight units of energy going from atmosphere to space formed?
Correct answer: A
The atmosphere re radiates the energy it receives toward space. In exams add fourteen and thirty four to remember forty eight.
How does total outgoing energy become hundred units in the heat budget?
Correct answer: A
All returning energy parts together make hundred units. In exams remember total outgoing as thirty five plus seventeen plus forty eight.
What relation is shown by sixty five absorbed units and sixty five outgoing longwave units in the heat budget?
Correct answer: A
Absorbed energy is ultimately balanced by longwave energy output. In exams remember sixty five absorption and sixty five heat output together.
QUIZ COMPLETE