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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 2
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  1. Because outgoing energy is greater than incoming energy
  2. Because incoming energy is greater than outgoing energy
  3. Because there is no energy flow there
  4. Because the Sun is permanently hotter there
Medium · Level 2
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  1. More direct angle of sun rays
  2. Sun rays always being oblique
  3. High reflection by snow
  4. Complete absence of day
Medium · Level 2
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  1. Oblique sun rays and higher reflection
  2. Sun rays always falling directly
  3. Complete absence of atmosphere
  4. Oceans always boiling
Medium · Level 2
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  1. They transfer heat latitudinally
  2. They stop the Sun
  3. They always make reflection zero
  4. They end terrestrial radiation
Medium · Level 2
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  1. Because local energy input reflection and absorption differ
  2. Because global balance means same temperature everywhere
  3. Because there is no local weather on Earth
  4. Because solar energy comes only to one city
Medium · Level 2
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  1. Absorbed solar energy may decrease
  2. Absorbed solar energy will always increase
  3. Longwave energy formation will stop
  4. Energy from the Sun will stop
Medium · Level 2
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  1. Snow has higher albedo so reflection is greater
  2. Forests always reflect all energy
  3. Snow absorbs all energy
  4. Both always have the same albedo
Medium · Level 2
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  1. Dark soil because its albedo is low
  2. White snow because its albedo is high
  3. Both will absorb exactly the same
  4. Neither will absorb energy
Medium · Level 2
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  1. Reflection of solar energy
  2. Direct absorption by surface
  3. Earth rotation
  4. Ocean salinity
Medium · Level 2
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  1. Energy loss may decrease
  2. Energy loss will always be infinite
  3. Solar energy will double
  4. Albedo will become zero
Medium · Level 2
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  1. Because gases like water vapour and carbon dioxide absorb longwave energy
  2. Because nitrogen reflects all shortwave energy
  3. Because the Moon traps energy
  4. Because oceans close the atmosphere
Medium · Level 2
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  1. Because Earth is cooler than the Sun and emits lower energy longwaves
  2. Because Earth emits sound waves
  3. Because the Sun gives no waves
  4. Because clouds create shortwaves
Medium · Level 2
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  1. The Sun is a very hot source
  2. The Sun is smaller than Earth
  3. The Sun shines only at night
  4. The Sun gives no energy
Medium · Level 2
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  1. In absorption energy is taken in and in reflection energy returns
  2. In absorption energy returns and in reflection energy is taken in
  3. In both energy is destroyed
  4. Both relate only to sound
Medium · Level 2
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  1. Temperature may rise because absorption may increase
  2. Temperature will always become zero
  3. Energy input will stop
  4. Terrestrial radiation will end
Medium · Level 2
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  1. More energy may escape directly to space
  2. All energy will change into the Sun
  3. All energy will become sound
  4. No terrestrial radiation will form
Medium · Level 2
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  1. Solar energy absorbed by atmosphere and terrestrial energy absorbed from surface
  2. Only energy reflected by snow
  3. Only energy reflected by clouds
  4. Only energy directly emitted by surface
Medium · Level 2
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  1. Some terrestrial energy escapes through atmospheric window
  2. All solar energy returns from surface
  3. Atmosphere takes no energy
  4. Clouds trap no energy
Medium · Level 2
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  1. By day they reflect shortwave and at night trap longwave
  2. They only destroy energy both day and night
  3. They affect only oceans
  4. They make the Sun shine at night
Medium · Level 2
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  1. It can reduce direct energy by spreading rays
  2. It sends all energy to Earths centre
  3. It switches off solar energy
  4. It changes longwave into shortwave
Medium · Level 2
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  1. Scattering and absorption of solar radiation
  2. Only Earths gravity
  3. Only river flow
  4. Only volcano shape
Medium · Level 2
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  1. The surface emits longwave energy which the atmosphere absorbs
  2. The surface makes the Sun hotter
  3. The surface removes the atmosphere
  4. The surface emits only sound energy
Medium · Level 2
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  1. Over long time energy gain and energy loss remain nearly equal
  2. Energy is always destroyed
  3. Earth creates energy but never loses it
  4. The Sun takes energy but gives none
Medium · Level 2
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  1. Absorbed energy will increase
  2. Absorbed energy will become zero
  3. Absorbed energy will always decrease
  4. Absorbed energy will become sound
Medium · Level 2
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  1. Absorption may increase and surface may warm more
  2. Reflection will increase and surface will cool
  3. All energy will go to space
  4. Atmosphere will disappear

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