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All questions of Resources and Development for Class 10 Exam
Which of the following statements is true about the term Resources?
- a)Resources are free gifts of nature
- b)They are the functions of human activities
- c) All those things which are found in nature
- d)Things which cannot be used to fulfil our needs
Correct answer is option 'B'. Can you explain this answer?
Which of the following statements is true about the term Resources?
a)
Resources are free gifts of nature
b)
They are the functions of human activities
c)
All those things which are found in nature
d)
Things which cannot be used to fulfil our needs
|
Meera Rana answered |
Correct option is B. They are the functions of human activities.
Resources are the functions of human activities. They are everything available in the environment that can be used to satisfy our needs.
No, the above statement is false as they are not free gifts of nature as resources are a function of human activities and they transform material available in our environment into resources and use them.
Resources are the functions of human activities. They are everything available in the environment that can be used to satisfy our needs.
No, the above statement is false as they are not free gifts of nature as resources are a function of human activities and they transform material available in our environment into resources and use them.
Resources which are found in a region but have not been utilised- a)Renewable
- b)Developed
- c)National
- d)Potential
Correct answer is option 'D'. Can you explain this answer?
Resources which are found in a region but have not been utilised
a)
Renewable
b)
Developed
c)
National
d)
Potential
|
Vivek Rana answered |
The resources which are found in a region but have not been utilized are called “potential resources”. These resources can be used in the future.
Which one of the following type of resource is iron ore?- a)Renewable
- b)Biotic
- c)Flow
- d)Non-renewable
Correct answer is option 'D'. Can you explain this answer?
Which one of the following type of resource is iron ore?
a)
Renewable
b)
Biotic
c)
Flow
d)
Non-renewable
|
Arun Sharma answered |
A nonrenewable resource is a substance that is being used up more quickly than it can replace itself. Its supply is finite. Most fossil fuels, minerals, and metal ores are nonrenewable resources.
Resources which are surveyed and their quantity and quality have been determined for utilisation are known as - a)Potential resources
- b)Stock
- c)Developed resources
- d)Reserves
Correct answer is option 'C'. Can you explain this answer?
Resources which are surveyed and their quantity and quality have been determined for utilisation are known as
a)
Potential resources
b)
Stock
c)
Developed resources
d)
Reserves
|
Krishna Iyer answered |
Developed resources are the one which is developed and surveyed for utilization and currently in use. They are also called actual resources.
Example: Petroleum and liquid gas in Bombay High in Maharashtra.
Example: Petroleum and liquid gas in Bombay High in Maharashtra.
The resources of ownership are- a)plantation
- b)pasture land
- c)ponds
- d)all of the above
Correct answer is option 'D'. Can you explain this answer?
The resources of ownership are
a)
plantation
b)
pasture land
c)
ponds
d)
all of the above
|
|
Ananya Das answered |
Plantation belongs to community or individual resources
Pasture land and ponds also come under community resources.
There are the 4 categories in which the resources are distributed according to ownership:
Pasture land and ponds also come under community resources.
There are the 4 categories in which the resources are distributed according to ownership:
- Individual
- Community
- National
- International
Under which of the following type of resource can tidal energy be put?- a)Replenishable
- b)Human-made
- c)Abiotic
- d)Non-recyclable
Correct answer is option 'A'. Can you explain this answer?
Under which of the following type of resource can tidal energy be put?
a)
Replenishable
b)
Human-made
c)
Abiotic
d)
Non-recyclable
|
|
Vikram Kapoor answered |
Tidal energy is replenishable energy.
Replenishable resources are capable of being used over and over again and are capable of regeneration.
They are inexhaustible resources and their quantity is vast, unlimited.
Example: water, wind, plant.
They are inexhaustible resources and their quantity is vast, unlimited.
Example: water, wind, plant.
Geothermal energy in Puga valley and Parvati Valley are- a)stock resources
- b)developed resources
- c)reserve resources
- d)potential resources
Correct answer is option 'B'. Can you explain this answer?
Geothermal energy in Puga valley and Parvati Valley are
a)
stock resources
b)
developed resources
c)
reserve resources
d)
potential resources
|
Naina Sharma answered |
The geothermal energy in Puga valley and Parvati Valley are considered as developed resources because these are the resources that are identified. They are well developed and are being used in the present.
Land left without cultivation for one or less than one agricultural year is called- a)Culturable wasteland
- b)Current fallow land
- c)Wasteland
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
Land left without cultivation for one or less than one agricultural year is called
a)
Culturable wasteland
b)
Current fallow land
c)
Wasteland
d)
None of the above
|
|
Amit Kumar answered |
Land left without cultivation for one or less than one year is called as current fallow. This is a natural process where land is given rest to gain its lost fertility naturally.
On the basis of its origin, resources can be classified into- a)renewable and non-renewable
- b)continuous and biological
- c)biotic and abiotic
- d)recyclable and non-recyclable
Correct answer is option 'C'. Can you explain this answer?
On the basis of its origin, resources can be classified into
a)
renewable and non-renewable
b)
continuous and biological
c)
biotic and abiotic
d)
recyclable and non-recyclable
|
Ishan Choudhury answered |
Resources can be categorized on the basis of origin:
(i) Abiotic resources comprise non-living things (e.g., land, water, air and minerals such as gold, iron, copper, silver).
(ii) Biotic resources are obtained from the biosphere.
(i) Abiotic resources comprise non-living things (e.g., land, water, air and minerals such as gold, iron, copper, silver).
(ii) Biotic resources are obtained from the biosphere.
Soil is formed by the process of- a)Denudation
- b)Gradation
- c)Weathering
- d)Erosion
Correct answer is option 'C'. Can you explain this answer?
Soil is formed by the process of
a)
Denudation
b)
Gradation
c)
Weathering
d)
Erosion
|
|
Anita Menon answered |
Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering.
Which one of the following is the main cause of land degradation in Punjab?- a)Intensive cultivation
- b)Over irrigation
- c)Deforestation
- d)Overgrazing
Correct answer is option 'B'. Can you explain this answer?
Which one of the following is the main cause of land degradation in Punjab?
a)
Intensive cultivation
b)
Over irrigation
c)
Deforestation
d)
Overgrazing
|
Pooja Shah answered |
Over irrigation is the main cause for land degradation in Punjab. The major cause of land degradation in punjab is "flooding or Over irrigation"
Which one of the following soils is ideal for growing cotton? - a)Regur soil
- b)Laterite soil
- c)Desert soil
- d)Mountainous soil
Correct answer is option 'A'. Can you explain this answer?
Which one of the following soils is ideal for growing cotton?
a)
Regur soil
b)
Laterite soil
c)
Desert soil
d)
Mountainous soil
|
|
Ananya Das answered |
Regur soil which is also known as cotton soil.
It is ideal for the growth of cotton because of the following reasons:
(i) Black soil is clayey in nature.
(ii) It contains a high proportion of calcium and magnesium carbonates.
(iii) It isFertile
(iv) It have high moisture holding capacity.
It is ideal for the growth of cotton because of the following reasons:
(i) Black soil is clayey in nature.
(ii) It contains a high proportion of calcium and magnesium carbonates.
(iii) It isFertile
(iv) It have high moisture holding capacity.
In which one of the following states is terrace Cultivacation practised? - a)Punjab
- b)Plains of Uttar Pradesh
- c)Haryana
- d)Uttarakhand
Correct answer is option 'D'. Can you explain this answer?
In which one of the following states is terrace Cultivacation practised?
a)
Punjab
b)
Plains of Uttar Pradesh
c)
Haryana
d)
Uttarakhand
|
|
Amit Sharma answered |
Rice and other crops are grown on the terraces. Hilly areas use this method of cultivation. The states that practice the cultivation are Uttarakhand, Himachal Pradesh and north-east states.
Which of the following resources is renewable?- a)Minerals
- b)Solar energy
- c)Fossil fuels
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
Which of the following resources is renewable?
a)
Minerals
b)
Solar energy
c)
Fossil fuels
d)
None of the above
|
|
Arun Sharma answered |
Solar energy is a renewable source of energy. This energy is derived from the Sun and produced by the fusion of Hydrogen into Helium.
The most widespread relief feature of India is- a)Mountains
- b)Forests
- c)Plains
- d)Plateaus
Correct answer is option 'C'. Can you explain this answer?
The most widespread relief feature of India is
a)
Mountains
b)
Forests
c)
Plains
d)
Plateaus
|
|
Kiran Mehta answered |
Plains are spread almost 3,200 km and mountains around 2400 km. Plateaus and forest are less spread.
Where was the first international Earth Summit held?- a)Rio de Janeiro
- b)Geneva
- c)Switzerland
- d)Philippines
Correct answer is option 'A'. Can you explain this answer?
Where was the first international Earth Summit held?
a)
Rio de Janeiro
b)
Geneva
c)
Switzerland
d)
Philippines
|
|
Naina Sharma answered |
First Earth summit which is also called as United Nations conference on environment and development was held in the year 1992 on 14th June. It was held in Rio de Janeiro in Brazil.
Everything available in our environment to satisfy our needs is termed as- a)natural vegetation
- b)resources
- c)natural vegetation
- d)none of these
Correct answer is option 'B'. Can you explain this answer?
Everything available in our environment to satisfy our needs is termed as
a)
natural vegetation
b)
resources
c)
natural vegetation
d)
none of these
|
|
Kiran Mehta answered |
Everything available in our environment which can be used to satisfy our needs, provided, its technologically accessible, economically feasible and culturally acceptable can be termed as resource.
Which of the following is not a measure to reduce soil erosion?- a)Creating deep channels (gullies)
- b)Contour ploughing
- c)Strip cropping
- d)Planting of shelterbelts
Correct answer is option 'A'. Can you explain this answer?
Which of the following is not a measure to reduce soil erosion?
a)
Creating deep channels (gullies)
b)
Contour ploughing
c)
Strip cropping
d)
Planting of shelterbelts
|
|
Kiran Mehta answered |
Gullies make it easy for the soil to get eroded by running water which result in a bad land topography known as ravines. Chambal river basin in Madhya Pradesh is famous for such ravines or bad lands.
Arches, stacks and caves are formed by erosional features of ______.- a)Wind
- b)Waves
- c)Water
- d)Glaciers
Correct answer is option 'B'. Can you explain this answer?
Arches, stacks and caves are formed by erosional features of ______.
a)
Wind
b)
Waves
c)
Water
d)
Glaciers
|
|
Ishan Choudhury answered |
Caves, arches, stacks, and stumps are erosional features that are commonly found on a headland. Cracks are widened in the headland through the erosional processes of hydraulic action and abrasion. As the waves continue to grind away at the crack, it begins to open up to form a cave.
The state, which is the best example of gully erosion is ______.- a)Uttar Pradesh
- b)Chhattisgarh
- c)Maharashtra
- d)Madhya Pradesh
Correct answer is option 'D'. Can you explain this answer?
The state, which is the best example of gully erosion is ______.
a)
Uttar Pradesh
b)
Chhattisgarh
c)
Maharashtra
d)
Madhya Pradesh
|
|
Vivek Rana answered |
The running water cuts through the clayey soils and makes deep channels known as gullies. The land becomes unfit for cultivation and is known as bad land. In the Chambal basin, such lands are called ravines. Chambal is in the state of Madhya Pradesh.
Which one of the following statements is correct as regards to international resources?
- a)Resources which are regulated by international institutions
- b)Resources which lie beyond the territorial waters
- c)Resources which are found along the international frontier
- d)Resources which are not yet developed
Correct answer is option 'A'. Can you explain this answer?
Which one of the following statements is correct as regards to international resources?
a)
Resources which are regulated by international institutions
b)
Resources which lie beyond the territorial waters
c)
Resources which are found along the international frontier
d)
Resources which are not yet developed
|
|
Meera Rana answered |
International resources are those resources which international Institutions regulate the ocean resources beyond 200 nautical miles of the Exclusive Economic Zone belong to open ocean and no individual country can utilise these without the concurrence of international institutions
so option A is correct
so option A is correct
Which of the following is an inexhaustible resource?- a)Mineral ores
- b)Uranium
- c)Sunlight
- d)Fossil fuels
Correct answer is option 'C'. Can you explain this answer?
Which of the following is an inexhaustible resource?
a)
Mineral ores
b)
Uranium
c)
Sunlight
d)
Fossil fuels
|
|
Rahul answered |
Solar radiation, or sunlight, in general is an inexhaustible resource. This is so because it is a resource that will not get exhausted in the future ( a few hundred years ) . They are unlimited in nature. For example , air, water, sunlight, biomass are inexhaustible sources of energy.
A: Fossil fuels are an important source of energy.R: Fossil fuels provide energy to different industries.- a)Both Assertion and Reason are true, and Reason is the correct explanation for Assertion
- b)Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion
- c)Assertion is true, but Reason is false
- d)Both Assertion and Reason are false
Correct answer is option 'A'. Can you explain this answer?
A: Fossil fuels are an important source of energy.
R: Fossil fuels provide energy to different industries.
a)
Both Assertion and Reason are true, and Reason is the correct explanation for Assertion
b)
Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion
c)
Assertion is true, but Reason is false
d)
Both Assertion and Reason are false
|
Radha Iyer answered |
The major energy sources are fossil fuels such as coal, petroleum and natural gases. They are an important source of energy for modern technology. Fossil fuels are used in industry, thermal plants, agricultural operations, automobiles etc.
Which one of the following is the main cause of land degradation in Punjab?- a)Intensive cultivation
- b)Deforestation
- c)Over irrigation
- d)Overgrazing
Correct answer is option 'D'. Can you explain this answer?
Which one of the following is the main cause of land degradation in Punjab?
a)
Intensive cultivation
b)
Deforestation
c)
Over irrigation
d)
Overgrazing
|
EduRev Class 10 answered |
In states like Gujarat, Rajasthan, Madhya Pradesh and Maharashtra overgrazing is one of the main reasons for land degradation
Who will maintain the organic matter of the soil?- a)Fungi and semi parasites
- b)Cyanobacteria and parasitic animals
- c)Protozoans and slime moulds
- d)Bacteria and fungi.
Correct answer is option 'D'. Can you explain this answer?
Who will maintain the organic matter of the soil?
a)
Fungi and semi parasites
b)
Cyanobacteria and parasitic animals
c)
Protozoans and slime moulds
d)
Bacteria and fungi.
|
|
Radha Iyer answered |
Bacteria and fungi carry out the decomposition of plant residues, breaking them down and holding the nutrients in their bodies; this prevents the nutrients leaching out into the soil.
Biotic resources are those obtained from the- a)Time
- b)Biosphere
- c)Water
- d)Wind
Correct answer is option 'B'. Can you explain this answer?
Biotic resources are those obtained from the
a)
Time
b)
Biosphere
c)
Water
d)
Wind
|
|
Rohit Sharma answered |
Biotic resources are resources or substances which are derived from the biosphere like living things and from forest and the materials derived from them.
Which is the most fertile soil among the following?- a)Black Soil
- b)Red Soil
- c)Laterite Soil
- d)Alluvial Soil
Correct answer is option 'D'. Can you explain this answer?
Which is the most fertile soil among the following?
a)
Black Soil
b)
Red Soil
c)
Laterite Soil
d)
Alluvial Soil
|
|
Krishna Iyer answered |
This is the most widely spread and important type of soil. In fact, the entire Northern Plains are made of alluvial soil. The alluvial soil consists of various proportions of sand, silt and clay. Alluvial soils as a whole are very fertile. Mostly these soils contain an adequate proportion of potash, phosphoric acid and lime.
Rocks and metals are resources.- a)Abiotic
- b)Biotic
- c)Renewable
- d)All of the above
Correct answer is option 'A'. Can you explain this answer?
Rocks and metals are resources.
a)
Abiotic
b)
Biotic
c)
Renewable
d)
All of the above
|
|
Naina Sharma answered |
All those things which are composed of non-living things are called abiotic resources. For example, rocks and metals.
The lower horizon of desert soil has deposits of______.- a)Calcium
- b)Iron
- c)Potash
- d)Phosphorus
Correct answer is option 'A'. Can you explain this answer?
The lower horizon of desert soil has deposits of______.
a)
Calcium
b)
Iron
c)
Potash
d)
Phosphorus
|
|
Radha Iyer answered |
Deserts soils are usually light coloured with minimal humus content due to which the plant productivity is low. Also, the water-retaining capacity is very less. However, they are rich in minerals- calcium carbonate (caliche), gypsum, and/or salts.
Resource planning is essential for __________ existence of all forms of life.- a)ecological balance
- b)sustainable
- c)exploitation
- d)none of these
Correct answer is option 'B'. Can you explain this answer?
Resource planning is essential for __________ existence of all forms of life.
a)
ecological balance
b)
sustainable
c)
exploitation
d)
none of these
|
|
Arun Sharma answered |
It is true that resource planning is essential for sustainable existence of all life forms. This is so because all resources are limited and the needs of future generation must also be kept in mind.So proper planning of resources will help in conservation and efficient utilisation without any wastage.
In areas getting more than 200cms of annual rainfall, which type of soil is found?- a)Black soil
- b)Red soil
- c)Laterite soil
- d)Alluvial soil
Correct answer is option 'C'. Can you explain this answer?
In areas getting more than 200cms of annual rainfall, which type of soil is found?
a)
Black soil
b)
Red soil
c)
Laterite soil
d)
Alluvial soil
|
|
Aditya Shah answered |
Intensive leaching is the primary explanation for the formation of laterite soils. Owing to heavy tropical rainfall more than 200 cms and high temperatures, leaching occurs.
Calcium carbonate, magnesium carbonate, potash and lime are rich in- a)Alluvial soil
- b)Red soil
- c)Black soil
- d)All of these
Correct answer is option 'C'. Can you explain this answer?
Calcium carbonate, magnesium carbonate, potash and lime are rich in
a)
Alluvial soil
b)
Red soil
c)
Black soil
d)
All of these
|
|
Kiran Mehta answered |
The black soils are made up of extremely fine i.e. clayey material. They are well-known for their capacity to hold moisture. In addition, they are rich in soil nutrients, such as calcium carbonate, magnesium, potash and lime.
Black cotton soil of the Deccan region is associated with ______ rocks.- a)Volcanic rocks
- b)Plutonic rocks
- c)Sedimentary rocks
- d)Hypabyssal rocks
Correct answer is option 'A'. Can you explain this answer?
Black cotton soil of the Deccan region is associated with ______ rocks.
a)
Volcanic rocks
b)
Plutonic rocks
c)
Sedimentary rocks
d)
Hypabyssal rocks
|
|
Avinash Patel answered |
Black soil is typical of the Deccan trap (Basalt) region spread over northwest Deccan plateau and is made up of volcanic lava flows.
Minerals are ______ resource.- a)Renewable
- b)Non-renewable
- c)Biotic
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Minerals are ______ resource.
a)
Renewable
b)
Non-renewable
c)
Biotic
d)
None of these
|
|
Radha Iyer answered |
Renewable resources are those which get renewed or replenished quickly, for ex- wind energy, solar energy etc.
What is a characteristic of lateritic soils?- a)They are shallow and rocky
- b)They are mostly deep and fertile
- c)They are mostly deep but the result of leaching
- d)They are rich in organic content
Correct answer is option 'C'. Can you explain this answer?
What is a characteristic of lateritic soils?
a)
They are shallow and rocky
b)
They are mostly deep and fertile
c)
They are mostly deep but the result of leaching
d)
They are rich in organic content
|
|
Ramya chauhan answered |
Understanding Lateritic Soils
Lateritic soils are unique types of soils formed under specific climatic conditions, primarily in tropical regions. Their characteristics are largely influenced by the processes of weathering and leaching.
Formation through Leaching
- Lateritic soils are predominantly formed in regions with high rainfall and temperature.
- The intense weathering leads to a process known as leaching, where water filters through the soil, dissolving and removing soluble minerals and nutrients.
- This process results in the soil becoming relatively poor in nutrients, particularly nitrogen and phosphorus.
Characteristics of Lateritic Soils
- Deep but Poor Fertility: Lateritic soils can be deep, but due to leaching, they often lack the fertility necessary for agriculture.
- Iron and Aluminum Rich: They are typically rich in iron and aluminum oxides, giving them a reddish color and making them hard when dry.
- Low Organic Content: The leaching process also means that organic material is not retained well, leading to low organic content in these soils.
Conclusion
In summary, lateritic soils are mostly deep but result from leaching processes that strip away nutrients, rendering them less fertile for agricultural purposes. This characteristic is what distinguishes lateritic soils from other types, making option 'C' the correct answer.
Lateritic soils are unique types of soils formed under specific climatic conditions, primarily in tropical regions. Their characteristics are largely influenced by the processes of weathering and leaching.
Formation through Leaching
- Lateritic soils are predominantly formed in regions with high rainfall and temperature.
- The intense weathering leads to a process known as leaching, where water filters through the soil, dissolving and removing soluble minerals and nutrients.
- This process results in the soil becoming relatively poor in nutrients, particularly nitrogen and phosphorus.
Characteristics of Lateritic Soils
- Deep but Poor Fertility: Lateritic soils can be deep, but due to leaching, they often lack the fertility necessary for agriculture.
- Iron and Aluminum Rich: They are typically rich in iron and aluminum oxides, giving them a reddish color and making them hard when dry.
- Low Organic Content: The leaching process also means that organic material is not retained well, leading to low organic content in these soils.
Conclusion
In summary, lateritic soils are mostly deep but result from leaching processes that strip away nutrients, rendering them less fertile for agricultural purposes. This characteristic is what distinguishes lateritic soils from other types, making option 'C' the correct answer.
Utilizing land for a variety of purposes is known as______.- a)Land use
- b)Intensive farming
- c)Subsistence farming
- d)Sugarcane
Correct answer is option 'A'. Can you explain this answer?
Utilizing land for a variety of purposes is known as______.
a)
Land use
b)
Intensive farming
c)
Subsistence farming
d)
Sugarcane
|
|
Naina Sharma answered |
Humans use the land for lots of different things. Utilizing land for a variety of purposes is known as land use. The land is used for various purposes. It is used for residence, agriculture, transport, industries, recreation, etc.
Which of the following statements represents characteristics of black soil?1) It develops cracks during hot weather2) Iron content present in this soil turns into iron oxide due to diffusion.3) It's made of fine clay particles4) It retains moisture for long- a)1 and 3 only
- b)1,2 and 3 only
- c)3 and 4 only
- d)1,3 and 4 only
Correct answer is option 'D'. Can you explain this answer?
Which of the following statements represents characteristics of black soil?
1) It develops cracks during hot weather
2) Iron content present in this soil turns into iron oxide due to diffusion.
3) It's made of fine clay particles
4) It retains moisture for long
a)
1 and 3 only
b)
1,2 and 3 only
c)
3 and 4 only
d)
1,3 and 4 only
|
|
Ashwini dubey answered |
Black soil, also known as regur soil or black cotton soil, is a type of soil that is found in several regions across the world. It is particularly common in India. Black soil is known for its fertility and ability to retain moisture, making it suitable for agriculture. Let's go through each statement to understand the characteristics of black soil.
1) It develops cracks during hot weather:
During hot weather, black soil undergoes significant changes. It has a high clay content, which causes the soil to shrink when it dries out. This shrinkage leads to the development of cracks in the soil surface. These cracks can be quite deep and wide, making it difficult for plants to establish their roots. However, these cracks are beneficial as they help in the aeration and drainage of the soil.
2) Iron content present in this soil turns into iron oxide due to diffusion:
This statement is incorrect. The iron content in black soil does not turn into iron oxide due to diffusion. Iron in black soil is present in the ferrous form, which gives the soil its characteristic black color. However, when the soil is exposed to air, oxidation occurs, resulting in the formation of iron oxide. This process is commonly known as rusting. The presence of iron oxide gives the soil a reddish or brownish color. Therefore, the iron content in black soil does not turn into iron oxide due to diffusion.
3) It is made of fine clay particles:
Black soil consists of fine clay particles, which contribute to its unique properties. The clay particles in black soil are extremely small in size and have a high surface area. This allows the soil to retain moisture effectively and provides a good environment for plant roots to penetrate and grow. The clay particles also contribute to the soil's ability to hold nutrients, making it highly fertile.
4) It retains moisture for long:
One of the key characteristics of black soil is its ability to retain moisture for a long time. The fine clay particles in the soil have a high water holding capacity. They can absorb and retain a significant amount of water, allowing it to be available to plants for a longer duration. This is especially beneficial in regions with limited rainfall or dry periods, as black soil can sustain crops during these periods.
In summary, the correct statements regarding the characteristics of black soil are:
- It develops cracks during hot weather.
- It is made of fine clay particles.
- It retains moisture for a long time.
Therefore, the correct answer is option D: 1, 3, and 4 only.
1) It develops cracks during hot weather:
During hot weather, black soil undergoes significant changes. It has a high clay content, which causes the soil to shrink when it dries out. This shrinkage leads to the development of cracks in the soil surface. These cracks can be quite deep and wide, making it difficult for plants to establish their roots. However, these cracks are beneficial as they help in the aeration and drainage of the soil.
2) Iron content present in this soil turns into iron oxide due to diffusion:
This statement is incorrect. The iron content in black soil does not turn into iron oxide due to diffusion. Iron in black soil is present in the ferrous form, which gives the soil its characteristic black color. However, when the soil is exposed to air, oxidation occurs, resulting in the formation of iron oxide. This process is commonly known as rusting. The presence of iron oxide gives the soil a reddish or brownish color. Therefore, the iron content in black soil does not turn into iron oxide due to diffusion.
3) It is made of fine clay particles:
Black soil consists of fine clay particles, which contribute to its unique properties. The clay particles in black soil are extremely small in size and have a high surface area. This allows the soil to retain moisture effectively and provides a good environment for plant roots to penetrate and grow. The clay particles also contribute to the soil's ability to hold nutrients, making it highly fertile.
4) It retains moisture for long:
One of the key characteristics of black soil is its ability to retain moisture for a long time. The fine clay particles in the soil have a high water holding capacity. They can absorb and retain a significant amount of water, allowing it to be available to plants for a longer duration. This is especially beneficial in regions with limited rainfall or dry periods, as black soil can sustain crops during these periods.
In summary, the correct statements regarding the characteristics of black soil are:
- It develops cracks during hot weather.
- It is made of fine clay particles.
- It retains moisture for a long time.
Therefore, the correct answer is option D: 1, 3, and 4 only.
Which of the weathering agents is almost peculiar to the Indian Himalayas?- a)Wind
- b)Glaciers
- c)Snowfall
- d)Running water
Correct answer is option 'B'. Can you explain this answer?
Which of the weathering agents is almost peculiar to the Indian Himalayas?
a)
Wind
b)
Glaciers
c)
Snowfall
d)
Running water
|
|
Vivek Rana answered |
A glacier erodes through a process called 'plucking' in which it lifts pieces of rock and transports them. These pieces of rock and the moving ice together act like sandpaper on the surface of the rock over which they flow. In the Himalayan region, the glacier is the major weathering agent.
Which of the weathering agents is almost peculiar to the Indian Himalayas?- a)Wind
- b)Glaciers
- c)Snowfall
- d)Running water
Correct answer is option 'B'. Can you explain this answer?
Which of the weathering agents is almost peculiar to the Indian Himalayas?
a)
Wind
b)
Glaciers
c)
Snowfall
d)
Running water
|
|
Aditya Shah answered |
A glacier erodes through a process called 'plucking' in which it lifts pieces of rock and transports them. In the Himalayan region, the glacier is the major weathering agent.
Which of the following countries is known as the 'Land of the Midnight Sun'?- a)Belgium
- b)Denmark
- c)Japan
- d)Norway
Correct answer is option 'D'. Can you explain this answer?
Which of the following countries is known as the 'Land of the Midnight Sun'?
a)
Belgium
b)
Denmark
c)
Japan
d)
Norway
|
|
Radha Iyer answered |
Norway experiences a natural phenomenon known as the midnight sun. The country acquired the name as the Land of Midnight because in the summer months, some parts of the country experience sunshine throughout the day.
Soil erosion is caused by______.- a)Water
- b)Wind
- c)Mining
- d)All of these
Correct answer is option 'D'. Can you explain this answer?
Soil erosion is caused by______.
a)
Water
b)
Wind
c)
Mining
d)
All of these
|
|
Aditya Shah answered |
Soil erosion is caused by water, mining, and air.
Under which of the following types of resources can tidal energy be put?- a)Replenishable
- b)Abiotic
- c)Human-made
- d)Non-recyclable
Correct answer is option 'A'. Can you explain this answer?
Under which of the following types of resources can tidal energy be put?
a)
Replenishable
b)
Abiotic
c)
Human-made
d)
Non-recyclable
|
|
Meera Rana answered |
Replenishable resources are also known as renewable resources. Solar energy, wind energy, water, thermal and tidal energy are the examples of replenishable resources.
A strip of land connecting the island with the mainland is called- a)Isthmus
- b)Continental shelf
- c)Tombolo
- d)Confluence
Correct answer is option 'C'. Can you explain this answer?
A strip of land connecting the island with the mainland is called
a)
Isthmus
b)
Continental shelf
c)
Tombolo
d)
Confluence
|
|
Avinash Patel answered |
A tombolo is a sandy isthmus. A tombolo, from the Italian tombolo, meaning 'pillow' or 'cushion', and sometimes translated as ayre, is a deposition landform in which an island is attached to the mainland by a narrow piece of land such as a spit or bar. Once attached, the island is then known as a tied island.
In which of the following states is the black soil found?
- a)Jammu and Kashmir
- b)Maharashtra
- c)Rajasthan
- d)Jharkhand
Correct answer is option 'B'. Can you explain this answer?
In which of the following states is the black soil found?
a)
Jammu and Kashmir
b)
Maharashtra
c)
Rajasthan
d)
Jharkhand
|
Ishan Khanna answered |
Black soil, also known as regur soil or black cotton soil, is one of the most fertile types of soil found in India. It is characterized by its dark color, high clay content, and excellent water-retaining capacity. Black soil is particularly suitable for growing cotton, hence its name "black cotton soil." Among the given options, black soil is found in Gujarat.
Gujarat:
- Gujarat is a state located in western India.
- It is known for its diverse landscapes, ranging from coastal areas to grasslands and desert regions.
- The state is blessed with a variety of soils, including black soil.
- Black soil in Gujarat is mainly found in the regions of Saurashtra and Kachchh.
- The black soil in Gujarat is a result of the weathering of volcanic rocks and basaltic lava flows.
- It is rich in nutrients like calcium, magnesium, potassium, and iron, making it highly fertile.
- The high clay content in black soil allows it to retain moisture, making it ideal for agriculture.
- Black soil in Gujarat is used for cultivating crops like cotton, groundnut, wheat, millet, and pulses.
- The fertile black soil of Gujarat has contributed significantly to the state's agricultural productivity.
Other Options:
- Jammu and Kashmir: Black soil is not found in Jammu and Kashmir. The soil types in this region are predominantly mountainous and include brown soil, loamy soil, and sandy soil.
- Rajasthan: Black soil is not found in Rajasthan. The state is known for its arid and semi-arid regions, where sandy and sandy-loam soils are more prevalent.
- Jharkhand: While Jharkhand has a variety of soil types, including red and laterite soils, black soil is not commonly found in this state.
In conclusion, black soil is found in Gujarat, making it an important region for agricultural activities, especially for crops like cotton and groundnut.
Gujarat:
- Gujarat is a state located in western India.
- It is known for its diverse landscapes, ranging from coastal areas to grasslands and desert regions.
- The state is blessed with a variety of soils, including black soil.
- Black soil in Gujarat is mainly found in the regions of Saurashtra and Kachchh.
- The black soil in Gujarat is a result of the weathering of volcanic rocks and basaltic lava flows.
- It is rich in nutrients like calcium, magnesium, potassium, and iron, making it highly fertile.
- The high clay content in black soil allows it to retain moisture, making it ideal for agriculture.
- Black soil in Gujarat is used for cultivating crops like cotton, groundnut, wheat, millet, and pulses.
- The fertile black soil of Gujarat has contributed significantly to the state's agricultural productivity.
Other Options:
- Jammu and Kashmir: Black soil is not found in Jammu and Kashmir. The soil types in this region are predominantly mountainous and include brown soil, loamy soil, and sandy soil.
- Rajasthan: Black soil is not found in Rajasthan. The state is known for its arid and semi-arid regions, where sandy and sandy-loam soils are more prevalent.
- Jharkhand: While Jharkhand has a variety of soil types, including red and laterite soils, black soil is not commonly found in this state.
In conclusion, black soil is found in Gujarat, making it an important region for agricultural activities, especially for crops like cotton and groundnut.
The Rio Convention endorsed the Global Forest Principles and adopted which of the following for achieving Sustainable Development in the 21st century?- a)Agenda 21
- b)Agenda 22
- c)Agenda 20
- d)Agenda 25
Correct answer is option 'A'. Can you explain this answer?
The Rio Convention endorsed the Global Forest Principles and adopted which of the following for achieving Sustainable Development in the 21st century?
a)
Agenda 21
b)
Agenda 22
c)
Agenda 20
d)
Agenda 25
|
|
Rohit Sharma answered |
Agenda 21 aims at achieving global sustainable development. It is an agenda to combat environmental damage, poverty, disease through global cooperation on common interests, mutual needs and shared responsibilities.
Arches, stacks and caves are formed by erosional features of ______.- a)Wind
- b)Waves
- c)Water
- d)Glaciers
Correct answer is option 'B'. Can you explain this answer?
Arches, stacks and caves are formed by erosional features of ______.
a)
Wind
b)
Waves
c)
Water
d)
Glaciers
|
|
Meera Rana answered |
Caves, arches, stacks, and stumps are erosional features that are commonly found on a headland. Cracks are widened in the headland through the erosional processes of hydraulic action and abrasion. As the waves continue to grind away at the crack, it begins to open up to form a cave.
Which one of the following soils found in India is the most useful for agriculture?- a)Black or regur soil
- b)Alluvial soil
- c)Red and yellow soil
- d)Marshy soil
Correct answer is option 'B'. Can you explain this answer?
Which one of the following soils found in India is the most useful for agriculture?
a)
Black or regur soil
b)
Alluvial soil
c)
Red and yellow soil
d)
Marshy soil
|
|
Kiran Mehta answered |
Alluvial soils are by far the largest and the most important soil group of India. Covering about 15 lakh sq km or about 45.6 per cent of the total land area of the country, these soils contribute the largest share of our agricultural wealth and support the bulk of India's population.
In India black soil is found in the- a)Greater Himalayas
- b)Deccan Trap
- c)Northern Plain
- d)Coastal region
Correct answer is option 'B'. Can you explain this answer?
In India black soil is found in the
a)
Greater Himalayas
b)
Deccan Trap
c)
Northern Plain
d)
Coastal region
|
|
Naina Sharma answered |
This type of soil is typical of the Deccan trap (Basalt) region spread over northwest Deccan plateau and is made up of lava flows.
In a society, human beings are- a)interdependent
- b)dependent
- c)independent
- d)isolated
Correct answer is option 'A'. Can you explain this answer?
In a society, human beings are
a)
interdependent
b)
dependent
c)
independent
d)
isolated
|
|
Rohit Sharma answered |
The process of transformation of things available in our environment involves an interdependent relationship between nature, technology and institutions. Human beings interact with nature through technology and create institutions to accelerate their economic development.
Soil can be conserved in a best on the hills by which of the cultivating methods?- a)Strip cropping
- b)Crop rotation
- c)Contour ploughing
- d)Terracing
Correct answer is option 'D'. Can you explain this answer?
Soil can be conserved in a best on the hills by which of the cultivating methods?
a)
Strip cropping
b)
Crop rotation
c)
Contour ploughing
d)
Terracing
|
Get Idea answered |
- Terracing involves creating stepped levels (terraces) on hillslopes, which reduces soil erosion by slowing water runoff and preventing soil from being washed away.
- It is the most effective method for hilly areas because it transforms steep slopes into flat, cultivable surfaces.
Why Not Other Options?
- A. Strip cropping: Used on gentle slopes to alternate erosion-resistant crops with regular crops, but less effective on steep hills.
- B. Crop rotation: Improves soil fertility but does not directly prevent erosion on slopes.
- C. Contour ploughing: Effective on mild slopes by ploughing along contour lines, but not sufficient for steep hills compared to terracing.
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