Given below are two statements, one is labelled as Assertion (A) and other as Reason (R) :
Assertion (A): The amount of moisture in the atmosphere is associated with latitude.
Reason (R): The ability to keep the moisture in the form of water vapour is related to temperature.
Code:
(A) and (R) are true, and (R) is the correct explanation of
(A).
Correct Answer:
(A)
and (R) are true, but (R) is not the correct explanation of
Ques:
32
Humid heat is experienced in summer when the weather is:
Correct Answer:
(D)
Muggy
Humidity is the amount of water vapour in the air. The energy in form of heat required to convert water into vapour or gas, is known as humid heat. In summer, humidity is very high therefore weather is muggy. Absolute humidity is the weight of water vapour per unit volume, usually expressed in grains per cubic foot.
Ques:
33
Why are dewdrops NOT formed on a cloudy night?
Correct Answer:
(B)
Clouds reflect back the Earth's radiation.
Dew : Dew is the water droplets formed by condensation of water vapour on a relatively cold surface of an object. It forms when the temperature of an object drops below the dew point temperature. When there is a cloudy weather condition, terrestrial radiation is radiated back to the earth's surface after reflection from clouds. This leads to the formation of Greenhouse condition due to which temperature on the earth's surface is relatively higher. Hence condition becomes unfavourable for the creation of dew.
Ques:
34
Given below are two statements, one is labelled as Assertion (A) and other as Reason (R) :
Assertion (A): 60o–65olatitudes in both the hemispheres have a low-pressure belt instead of high pressure.
Reason (R): The low-pressure areas are stable over oceans rather than on land.
Code:
(A) and (R) are true, and (R) is the correct explanation of
(A).
Correct Answer:
(C)
is true, but (R) is false.
The sub-polar low-pressure belt lies between 60°- 65°latitude in both the hemisphere throughout the year as there is low temperature and low atmospheric pressure. Although this belt has nothing to do with temperature. Hence, assertion (A) is correct. Low atmospheric pressure generally built upon land where as high atmospheric pressure built mostly over oceans. Hence, reason (R) is incorrect.
Ques:
35
A device used to measure humidity is called a
Correct Answer:
(B)
Hygrometer
A hygrometer is an instrument used to measure relative humidity. A psychrometer is an example of a hygrometer. A psychrometer uses two thermometers to measure relative humidity, one measures the dry-bulb temperature, and the other measures the wet-bulb temperature.
Ques:
36
Consider the following statements:
In the tropical zone, the western sections of the oceans are warmer than the eastern sections owing to the influence of trade winds.
In the temperate zone, westerlies make the eastern sections of oceans warmer than the western sections.
Which of the statements given above is/are correct?
Correct Answer:
(C)
Both 1 and 2
The direction of trade winds in the tropics is from east to west, due to this, when the warm terrestrial wind reaches the ocean located to the west of the landmass, it raise the temperature of those oceans. In the temperate zone, the westerly wind blows from west to east, in which the eastern sections of the oceans become warmer. So, both the statements are correct.
Ques:
37
Given below are two statements, one is labelled as Assertion (A) and other as Reason (R) :
Assertion (A): Wind patterns are clockwise in the northern hemisphere and anti-clockwise in the southern hemisphere.
Reason (R): The directions of wind patterns in the northern and the southern hemisphere are governed by the Coriolis effect.
Code:
(A) and (R) are true, and (R) is the correct explanation of
(A)
Correct Answer:
(A)
and (R) are true, but (R) is not the correct explanation of
Ques:
38
Westerlies in the southern hemisphere are stronger and persistent than in the northern hemisphere because?
Southern hemisphere has less landmass as compared to northern hemisphere
Coriolis force is higher in the southern hemisphere as compared to the northern hemisphere.
Which of the statements given above is/are correct?
Correct Answer:
(A)
1 only
The westerlies are prevailing wind from the west towards the east between sub-tropical high-pressure zone (30°–35°) and sub polar low pressure (60°–65°). These winds are more complicated in the northern hemisphere due to the larger expansion of land. These are less active during summer and more active in winter. As these passes over the sea, these carry moisture and cause rain. Due to the lesser expansion of land in the southern hemisphere, these winds become extremely powerful and turn into a storm. Due to its intensity in the southern hemisphere, it is called 'Roaring Forties' at 40° latitude, 'Furious fifties' at 50° latitude and 'Shrieking sixties' at 60° latitudes.
Ques:
39
Consider the following statements about the 'Roaring Forties':
They blow uninterrupted in the northern and southern hemispheres
They blow with great strength and constancy
Their direction is generally from north - west to east in the southern hemisphere
Overcast skies, rain and raw weather are generally associated with them
Which of these statements are correct?
Correct Answer:
(B)
2, 3 and 4
The Roaring Forties are strong westerly winds that blow in the Southern Hemisphere, generally between the latitudes of 40°- 50°. Roaring Forties are stormy in nature. The strong north-west to east air currents are caused by the combination of air being displaced from the Equator towards the South Pole and the Earth’s rotation. The Roaring Forties bring overcast skies, rains, and cold temperatures. Therefore, statement (2),(3) and (4) are correct. Wellington (New Zealand) is the only capital in the “Roaring Forties” latitudes.
Ques:
40
What is the effect of Chinook winds in the central plains in the USA?
Correct Answer:
(A)
Temperature of winter rises
Chinook means “snow-eater”. Chinook winds are most common during winter and early spring along the eastern slopes of the Rocky Mountains from Colorado (USA) into British Columbia (Canada) in the north. Chinook is a hot wind that blows in winter and therefore raises the temperature within a short time. The increase in temperature results in the melting of snow, making pasture land available for grazing of animals.