Atmosphere - Study Mode

[#66] Condensation is a process which occurs when
Correct Answer

(D) Relative humidity becomes 100% and more

Explanation

Solution: When relative humidity approaches 100%, condensation can occur on surfaces. The relative humidity is 100% when the dew point and the temperature are the same. If the temperature drops any further, condensation will result, and liquid water will begin to form.

[#67] Which one of the following conditions is not necessary for precipitation to occur?
Correct Answer

(A) The air must be warm

Explanation

Solution: The air may or may not be warm. Most of the condensed water in clouds does not fall as precipitation because their fall speed is not large enough to overcome updrafts which support the clouds. For precipitation to happen, first tiny water droplets must condense on even tinier dust, salt, or smoke particles, which act as a nucleus.

[#68] Transfer of surplus heat from the lower latitudes to higher latitudes is done by : I. ocean currents II. planetary winds III. tides IV. waves
Correct Answer

(A) I and II

Explanation

Solution: Transfer of surplus heat from the lower latitudes to higher latitudes is done by ocean currents and planetary winds.

[#69] The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from ________
Correct Answer

(D) Ionosphere

Explanation

Solution: The phenomenon of Aurora Borealis, the display of red and green lights in northern hemisphere is due to radiations from Ionosphere. The aurora borealis of the Northern Hemisphere is often called the northern lights, and the aurora australis of the Southern Hemisphere is known as the southern lights. Each is visible over an area centering around the geomagnetic pole of its own hemisphere.

[#70] Smog is likely to occur ________
Correct Answer

(D) Near the industrial areas

Explanation

Solution: Smog was common in industrial areas, and remains a familiar sight in cities today. Industrial smog typically exists in urban areas where factories burn fossil fuels such as coal, which creates smoke and sulfur dioxide that mix with fog droplets to create a thick blanket of haze close to the ground.