Heating and cooling of the atmosphere

Correct answer: A. Temperature will increase

When energy gain is greater, the surface and nearby air warm. Exam tip: link temperature change with energy budget.

Correct answer: A. Cooling

The direct answer is A, cooling. A surface or atmosphere has an energy balance: if energy leaving as heat is greater than energy received or retained, its stored energy decreases. With less stored energy, temperature tends to fall, so cooling becomes more likely. Option A is correct and explains why the ground often cools at night after losing terrestrial radiation. Option B, maximum heating, is the opposite outcome and would require energy gain to exceed heat loss. Option C, increase in the solar constant, is not a result of heat loss; the solar constant is an external solar-energy measure. Option D, absence of albedo, is not a condition produced by greater heat loss. Albedo means the fraction of incoming sunlight reflected by a surface, and it does not disappear simply because the surface is losing heat. Exam cue: loss greater than gain means a negative energy balance and cooling.

Correct answer: A. High water vapour and clouds

Water vapour and clouds reduce both daytime heating and night cooling. Exam tip: treat humidity as a temperature-moderating factor.

Correct answer: A. Inversion can prevent vertical mixing

In inversion cold air trapped below can hold pollutants. Exam tip: link inversion with fog and pollution.

Correct answer: A. It creates pressure difference and controls wind direction

Different heating of land and water creates pressure differences. Exam tip: link local winds with unequal heating.

Correct answer: A. Adiabatic temperature change

Air can cool by expansion while rising and warm by compression while sinking. Exam tip: use it in mountain and convection processes.

Correct answer: A. Solar absorption terrestrial radiation atmospheric heating heat loss

The surface absorbs solar energy, then terrestrial radiation heats the atmosphere and heat is later lost. Exam tip: remember the sequence of energy flow.

Correct answer: A. Because temperature difference creates pressure difference

Wind is moving air, and air moves when pressure is not the same in different places. Unequal heating makes some air warmer and less dense, while other air remains cooler and denser. These differences help create pressure differences. Air then generally moves from a region of higher pressure toward a region of lower pressure, although Earth’s rotation and friction can modify its direction. Therefore, heating and cooling of the atmosphere are basic causes behind many wind systems.

Option A is correct because temperature differences can produce pressure differences, and pressure differences set air in motion. Wind is not formed only by the Moon, temperature is not unrelated to pressure, and air does have density. The useful sequence is unequal heating, unequal temperature, pressure variation, and horizontal air movement. This explains why daily, seasonal, and larger atmospheric wind systems are affected by heating and cooling.

Correct answer: A. Because the surface absorbs solar energy and emits longwave radiation

Longwave radiation emitted by the surface heats the lower air. Exam tip: understand atmospheric heating from below.

Correct answer: B. Conduction

In conduction heat moves by direct contact. Exam tip: remember contact between ground and nearby air.

Correct answer: C. Convection

In convection heat is transferred by vertical air movement. Exam tip: call up-down air movement convection.

Correct answer: D. Advection

In advection air transfers heat horizontally. Exam tip: link temperature change by wind with advection.

Correct answer: A. Solar radiation is shortwave and terrestrial radiation is longwave

The Sun is a hotter source, so its radiation is shortwave. Exam tip: remember energy emitted by Earth as longwave.

Correct answer: B. Greater loss of longwave radiation

Under a clear sky clouds cannot trap terrestrial radiation, so heat loss is greater. Exam tip: link clear nights with radiational cooling.

Correct answer: C. They reflect solar radiation by day and trap terrestrial radiation at night

Clouds have different effects during day and night. Exam tip: remember this as the dual effect of clouds.

Correct answer: A. Latent heat is released

Latent heat is released when water vapour becomes water droplets. Exam tip: connect condensation with heat release.

Correct answer: B. High heat capacity of water

Water heats and cools slowly, so coastal temperature remains moderate. Exam tip: link this with marine moderation.

Correct answer: C. Rapid heating and cooling of land

Land has lower heat capacity than water, so temperature changes quickly. Exam tip: link continentality with high temperature range.

Correct answer: D. Normal lapse rate

Normal lapse rate shows the rate of temperature decrease with height. Exam tip: connect it with vertical temperature distribution.

Correct answer: A. Temperature may increase with height

In inversion cold air can stay below and warm air above. Exam tip: understand it as reverse of normal lapse rate.

Correct answer: B. Temperature inversion

Cold dense air settles in valleys while relatively warmer air may remain above. Exam tip: link valley inversion with night cooling.

Correct answer: C. Because energy gain remains greater than heat loss for some time

The ground and lower atmosphere do not stop receiving energy exactly at noon. After midday, incoming solar energy may still exceed the heat being lost from the surface for some time. The warmed ground then continues transferring heat to the air, so the air temperature keeps rising even though the Sun has begun moving lower in the sky. Later, heat loss becomes greater than energy gain, and the temperature starts to fall. This delay is called temperature lag.

Option C is correct because it explains the temporary positive energy balance after noon. The Sun does not rise after noon, and clouds do not always disappear. Night does not begin immediately after midday. The maximum temperature therefore usually occurs later than noon, often in the afternoon, because the surface and air need time to respond to the changing balance between incoming and outgoing energy.

Correct answer: D. Because heat loss continues throughout the night

The surface keeps losing heat until before sunrise. Exam tip: link minimum temperature with night radiational cooling.

Correct answer: A. It retains part of longwave radiation emitted by Earth

Greenhouse gases limit heat loss and maintain temperature. Exam tip: understand it as natural temperature regulation.

Correct answer: B. They absorb longwave radiation

These greenhouse gases absorb part of terrestrial radiation. Exam tip: link them with atmospheric heating.