Given below are two statements, one is labelled as Assertion (A) and other as Reason (R).
Assertion (A): The Pampas plain is the main region for cultivation in Argentina.
Reason (R): The fertile soil of Pampas and the temperate climate are very useful for growing crops and grasses.
Choose the correct answer from the code given below.
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
The Pampas of South America are a grassland biome. They are flat, fertile plains, found primarily in Argentina and extends into Uruguay. Because of the temperate climate and rich, deep soil, most of the Pampas have been brought under cultivation and turned into croplands.
Ques:
22
Which of the following is correctly matched
Correct Answer:
(B)
Llanos - Venezuela
Llanos Grasslands are found in Venezuela while Campos, Pampas and Selvas grass field are found in South East Brazil, Argentina and Amazon Basin respectively.
Ques:
23
Which one of the following is not correctly matched?
Correct Answer:
(A)
Downs - Tropical grassland
Tropical grass fields are found amid equatorial evergreen forests and hot desert areas. Examples of such grass fields are as – Llanos, Campos, Selvas, Parkland and Savanna. Temperate grass fields are stretched across the region of temperate climate. Example of these grasslands are Prairies, Pampas, Steppes, Veld and Downs. Thus, option (a) is not correctly matched while other options are correctly matched.
Ques:
24
Which of the following temperate grasslands are found in Eurasia?
Correct Answer:
(C)
Steppes
The temperate grassland found in Eurasia region is Steppes. The Steppes is a belt of grassland that extends some 5,000 miles (8,000 km) from Hungary in the west through Ukraine and Central Asia to Manchuria in the east. Steppes are practically treeless and grasses are much shorter.
Ques:
25
The vegetation of savannah consists of grassland with scattered small trees, but extensive areas have no trees. The forest development in such areas is generally kept in check by one or more or a combination of some conditions. Which of the following are such conditions?
Burrowing animals and termites
Fire
Grazing herbivores
Seasonal rainfall
Soil properties
Select the correct answer using the code given below:
Correct Answer:
(C)
2, 3 and 4
The main obstacle in the development of forest in the savanna grassland is the abundance of grass-grazing animals, fire in this area and seasonal rainfall. Due to seasonal rains, everything dries up in the summer in this region, due to which the development of forest is not possible in this area.
Ques:
26
Which one of the following reflects more sunlight as compared to the three?
Correct Answer:
(C)
Land covered with fresh snow
Albedo is the fraction of solar energy (short wave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the Earth’s surface. Land covered with fresh snow has a high albedo (75-95%), most sunlight hitting the surface bounces back towards space. The average albedo of Earth is 30 - 35%. The sand desert has albedo 20-30%. Paddy cropland has albedo 3-15% and Prairie land has albedo 10-20%.
Ques:
27
Consider the following statements:
The annual range of temperature is greater in the Pacific Ocean than that in the Atlantic Ocean.
The annual range of temperature is greater in the Northern Hemisphere than that in the Southern Hemisphere.
Which of the statements given above is/are correct?
Correct Answer:
(B)
2 only
More the size of the ocean, less the variation in the annual temperature. Therefore, more temperature variation is found at the Atlantic Ocean as compared to the Pacific Ocean.
Ques:
28
Which of the following statements is not true:
Correct Answer:
(B)
The zone of maximum temperature is located along the equator
The average, temperature decreases from the Equator towards the higher degree latitude. It may be noted that the highest temperature is never recorded at the Equator, instead, it is recorded at the 20° N. So, it can be said that the zone of maximum temperature is not located at the equator. Therefore, statement (b) is not correct, other statements are correct.
Ques:
29
Clear sky nights are cooler than cloudy sky nights due to
Correct Answer:
(B)
radiation
The cloudy night contains more water vapour than a clear night. The heat emitted from the Earth’s surface is trapped by the clouds and emitted back towards the earth. As a result, cloudy night seems warmer than clear night. If the sky is clear, heat emitted from the Earth’s surface freely escapes into space, resulting in colder temperatures.
Ques:
30
1. Consider the following statements:
1. The incoming solar radiation on earth is known as insolation 2. The farthest distance of the earth from the Sun is 152 million Km on 4th July 3. The position of the earth when it is nearest to the Sun is called Aphelion
Select the correct answer using the code given below
Correct Answer:
(B)
1 and 2 only
The amount of solar radiation received by the surface of the earth is called insolation. The word insolation means incoming solar radiation. It consists of a bundle of rays of radient energy of different wavelengths.
During its revolution around the sun, the earth is farthest from the sun (152 million km) on 4th July. This position of the earth is called aphelion.
The Earth is closest to the Sun, or at the Perihelion, about 2 weeks after the December Solstice, when it is winter in the Northern Hemisphere.