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Question 1 of 5
1. Question
2 points1. Consider the following statements with respect to Earth’s magnetic field:
1. It is generated as a result of electromagnetic induction caused by convective movement in the molten inner core.
2. Sedimentary rocks provide very good record of reversal of magnetic field of Earth
Which of the statements given above is/are correct?Correct
Answer: D
Explanation
• Statement 1 is not correct: the magnetic field is mostly caused by electric currents in the liquid outer core (According to dynamo theory), which is composed of conductive, molten iron along with other elements. Loops of currents in the constantly moving liquid iron create a magnetic field by the process of electromagnetic induction.
• Statement 2 is not correct: It is the igneous rock that records the magnetism of earth and can be used to ascertain the point of time then reversal of magnetism took place. It is because as Lava solidifies, the magnetic minerals Orient themselves in line with the magnetism of that time. Sedimentary rocks are formed as a result of weathering, movement, and subsequent deposition. As this process takes a long time, they fail to provide usable information about changing magnetism of Earth. Rocks also fail to give proper evidence for us magnetism as intensive heat and pressure that generate metamorphic rocks causes any magnetic records to get lost.Incorrect
Answer: D
Explanation
• Statement 1 is not correct: the magnetic field is mostly caused by electric currents in the liquid outer core (According to dynamo theory), which is composed of conductive, molten iron along with other elements. Loops of currents in the constantly moving liquid iron create a magnetic field by the process of electromagnetic induction.
• Statement 2 is not correct: It is the igneous rock that records the magnetism of earth and can be used to ascertain the point of time then reversal of magnetism took place. It is because as Lava solidifies, the magnetic minerals Orient themselves in line with the magnetism of that time. Sedimentary rocks are formed as a result of weathering, movement, and subsequent deposition. As this process takes a long time, they fail to provide usable information about changing magnetism of Earth. Rocks also fail to give proper evidence for us magnetism as intensive heat and pressure that generate metamorphic rocks causes any magnetic records to get lost. -
Question 2 of 5
2. Question
2 points2. Which of the following may be the outcome of melting of glaciers and ice sheets?
1. Formation of more clouds
2. Increase in the number of glacial lakes
3. Increase in instances of floods
Select the correct answer using the code given below:Correct
Answer: D
Explanation
● The impact of melting of glaciers is the formation of a new glacial Lake by accumulation of melt water resulting from the Glacier retreat. These new lakes form due to shrinking glaciers in the elves, Himalayas and Andes and other mountain regions have increased the risk of glacial Lake outburst floods (GLOFs).
● Recently it was reported that Arctic ice are disappearing at some of the fastest rate in centuries as Global temperature rises. Now, scientists suggest that melting glaciers may in turn, influence the Arctic climate. As glacial melt and retreat, exposing more and more ice free earth as they go, they can keep up clouds of dust into the atmosphere. New research suggests that these 10 particles mainly affect the formation of Arctic clouds, which have a major influence over the reasons for temperature and precipitation.
● Iin location such as and is of South America and Himalayas in Asia, the demise of glaciers in these regions will have potential impact on water supply, and flooding from’ mountains Tsunami’. The reason the substantial Retreat and acrylation of the rate of retreats 1995 of a number of key outlet glaciers of the Greenland and the west Antarctic eye sheet for Shadow are rise in sea level having a potentially dramatic effect on coastal regions worldwide.Incorrect
Answer: D
Explanation
● The impact of melting of glaciers is the formation of a new glacial Lake by accumulation of melt water resulting from the Glacier retreat. These new lakes form due to shrinking glaciers in the elves, Himalayas and Andes and other mountain regions have increased the risk of glacial Lake outburst floods (GLOFs).
● Recently it was reported that Arctic ice are disappearing at some of the fastest rate in centuries as Global temperature rises. Now, scientists suggest that melting glaciers may in turn, influence the Arctic climate. As glacial melt and retreat, exposing more and more ice free earth as they go, they can keep up clouds of dust into the atmosphere. New research suggests that these 10 particles mainly affect the formation of Arctic clouds, which have a major influence over the reasons for temperature and precipitation.
● Iin location such as and is of South America and Himalayas in Asia, the demise of glaciers in these regions will have potential impact on water supply, and flooding from’ mountains Tsunami’. The reason the substantial Retreat and acrylation of the rate of retreats 1995 of a number of key outlet glaciers of the Greenland and the west Antarctic eye sheet for Shadow are rise in sea level having a potentially dramatic effect on coastal regions worldwide. -
Question 3 of 5
3. Question
2 points3. With reference to alluvial soil in India, consider the following statements:
1) They are poor in nitrogen but rich in potash.
2) They are not found in the peninsular regions.
3) Bhangar soils are less fertile than Khadar soil
Which of the statements given above is/are correct?Correct
Answer: D
Explanation
● Alluvial soils are widespread in the northern Plains and the river valleys. These soils cover about 40% of the total area of the country. They are depositional soils, transported and deposited by rivers and streams. Through a narrow corridor in Rajasthan, they extend into the Plains of Gujarat. In the peninsular region, they are found in deltas of the east coast and in the river valleys. And hence, statement 2 is not correct.
● The alluvial are generally rich in potash but poor in phosphorus and nitrogen. The amount of iron oxide varies with a wide range. Hence, statement 1 is correct.
● In the Upper and Middle Ganga plane, two different types of alluvial soils have developed, viz. Khadar and Bhangar. Khadar is the new alluvium and is deposited by floods annually, which enriches the soil by depositing fine silts. Bhangar represents a system of older alluvium, deposited away from the flood plains. Hence, the khadar soils which get replenished every year tend to be more fertile than Bhabar soils.Incorrect
Answer: D
Explanation
● Alluvial soils are widespread in the northern Plains and the river valleys. These soils cover about 40% of the total area of the country. They are depositional soils, transported and deposited by rivers and streams. Through a narrow corridor in Rajasthan, they extend into the Plains of Gujarat. In the peninsular region, they are found in deltas of the east coast and in the river valleys. And hence, statement 2 is not correct.
● The alluvial are generally rich in potash but poor in phosphorus and nitrogen. The amount of iron oxide varies with a wide range. Hence, statement 1 is correct.
● In the Upper and Middle Ganga plane, two different types of alluvial soils have developed, viz. Khadar and Bhangar. Khadar is the new alluvium and is deposited by floods annually, which enriches the soil by depositing fine silts. Bhangar represents a system of older alluvium, deposited away from the flood plains. Hence, the khadar soils which get replenished every year tend to be more fertile than Bhabar soils. -
Question 4 of 5
4. Question
2 points4. Which of the following rivers cut across the tropic of cancer?
1. Mahi
2. Damodar
3. Chambal
4. Tapi
Select the correct answer using the code given below:Correct
Answer: B
Explanation
● Mahi cuts across the Tropic of Cancer twice. Mahi river is the only river in India that cuts the Tropic of Cancer twice, first in Madhya Pradesh from where it flows towards Rajasthan and enters Gujarat where it cuts for the second time.
● Damodar and Chambal cut across the Tropic of Cancer while Tapi which flows majorly in Maharashtra.Incorrect
Answer: B
Explanation
● Mahi cuts across the Tropic of Cancer twice. Mahi river is the only river in India that cuts the Tropic of Cancer twice, first in Madhya Pradesh from where it flows towards Rajasthan and enters Gujarat where it cuts for the second time.
● Damodar and Chambal cut across the Tropic of Cancer while Tapi which flows majorly in Maharashtra. -
Question 5 of 5
5. Question
2 points5. Consider the following pair of rivers and the state boundaries:
Rivers – State Boundaries
1. Pranhita – Chhattisgarh and Maharashtra
2. Indravati – Maharashtra and Telangana
3. Chambal – Rajasthan and Madhya Pradesh
Which of the above given pairs is/are correctly matched?Correct
Answer: B
Explanation: Refer to the table of correct matches given below:
Rivers – State Boundaries
1. Pranhita – Maharashtra and Telangana
2. Indravati – Chhattisgarh and Maharashtra
3. Chambal – Rajasthan and Madhya PradeshIncorrect
Answer: B
Explanation: Refer to the table of correct matches given below:
Rivers – State Boundaries
1. Pranhita – Maharashtra and Telangana
2. Indravati – Chhattisgarh and Maharashtra
3. Chambal – Rajasthan and Madhya Pradesh
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