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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Lets find the names of the soils we have learnt and which regions they are found? |
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| 52. |
Why do equatorial regions have fertile soils? |
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Answer» The sun rays are perpendicular in equatorial regions so the climate is very hot and humid. This region also receives very heavy rainfall. As the process of soil formation is faster in these regions, equatorial regions have fertile soil. Also vegetal litter roots of plants, remains of animals, etc.; get decomposed adding to soil fertility. |
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| 53. |
These vessels are made up ofA) Steel B) Wood C) Clay D) Copper |
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Answer» Correct option is C) Clay |
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| 54. |
Clay loam and sand are types of A) minerals B) metals C) soilD) stones |
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Answer» Correct option is C) soil |
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| 55. |
Clay and loam are suitable for growing A) wheat B) gram C) paddy D) all of these |
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Answer» Correct option is D) all of these |
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| 56. |
Complete the following table with reference to soil.ActionEffectResult (W.R.T. fertility)Construction of embankments.Wind speed decreased.Farm land is kept fallow for some period.Helps to maintain the pH balance and increase the proportion of humus.Increases the fertility of soil.Regular use of organic manures, vermicompost and compost.Check the velocity of water running along the slopes.Litter is burnt in the farm.Decomposed vegetal litters, roots of plants and remains of animals.Salt content in the soil increases.Leads to the lowering of humus content in the soil. |
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| 57. |
Give information on:Place where you will get the information about the suitability of a soil for a particular crop. |
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Answer» (i) The information about the suitability of a soil can be obtained from Department of Agriculture of Government of Maharashtra, Natural Resource conservation services, soil testing laboratories in various states and at many agricultural universities. (ii) The type of soil, soil fertility, pH status of the soil, etc. are determined in soil testing. (iii) Based on the testing, an analysis of the soil is done & information about the suitability of a soil for a particular crop is provided. |
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| 58. |
Give information on:Importance of soils for plant growth. |
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Answer» (i) Soil is important for plant as it hold roots that provide support for plants and stores nutrient for the growth of plants. (ii) Fertile soils favour plant growth. |
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| 59. |
Through this experiment what can we find out ?A) Soil erosion B) Soil profile C) Soil fertility D) Percolation rate of soil |
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Answer» D) Percolation rate of soil |
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| 60. |
Making pots by using soil is called A) Bidri B) Kalamkari C) PottaryD) None of these |
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Answer» C. Pottery EXPLANATION Pottery is the process and the products of forming vessels and other objects with clay and other ceramic materials, which are fired at high temperatures to give them a hard and durable form. Major types include earthenware, stoneware and porcelain Correct option is C) Pottary |
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| 61. |
Soil is a good A) habitat B) material C) source for plant D) living place for snails |
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Answer» Correct option is A) habitat |
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| 62. |
“If you sow a seed in the soil it will give birth to a tiny plant which grows bigger and bigger. “It is the wonder of soil” Swetha said. How do you express your appreciation of soil like Swetha? |
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Answer» 1. Soil always support plants to grow. 2. It is plants that grow life long. 3. Soil supplies the necessary water and nutrients to the plant throughout its life period. 4. The plant makes it own food using, solar energy and the gases in the atmosphere with the help of water supplied by the soil. 5. It is one of the wonderful things we observe in the nature. |
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| 63. |
Write a dialogue between seed and soil and perform a small play using your own script. |
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Answer» Soil : Who are you? Seed : I am as eed. Soil : What do you want from me? Seed : I want water, minerals and nutrients. Soil : Why do you need all those things? Seed : As I want to germinate and become a big tree I need all those things. Soil : Definitely I will supply all that things needed to you to become a big tree. |
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| 64. |
If you have a chance to talk with a soil scientist, what questions would you like to ask him about soil? |
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Answer» I shall ask the following questions. 1. How can you test the soil for its acidity? 2. Is it possible to change the basic nature of the soil? 3. How can the water holding capacity of the soil be increased at a low cost. 4. Suggest methods to improve the fertility of the soil. 5. What can be done with the black cotton soil when a building is to be constructed? 6. As black cotton soil yields, and the building cracks, suggest preventive measures for it. |
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| 65. |
What is soil science? |
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Answer» 1. Soil science is the study of soil as a natural resource on the surface of the Earth. 2. This includes soil formation, classification and mapping, physical-chemical – biological and fertility properties of soil. 3. Sometimes terms that refer to branches of soil science such as pedology and edaphology are used as if synonymous with soil science. 4. The study of formation, chemistry, morphology and classification of soil is called pedology. 5. The study of the influence of soil on organisms, especially on plants is called edaphology. 6. The diversity of names associated with this discipline is related to the various associations concerned. 7. Indeed engineers, agronomists, chemists, geologists, physical geographers, ecologists, biologists, microbiologists, silvi culturists, archeologists all contribute to further knowledge of soil and the advancement of soil science. |
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| 66. |
Class 7 Science MCQ Questions of Soil with Answer? |
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Answer» Class 7 Science MCQ Questions of Soil with Answer are available here. Every one of the various decision questions is offered here with reasonable answers and clarification of answers. The content is updated for academic session 2021-2022. Significant MCQ Questions for Class 7 Science, collectively give a perfect revision of the part for Class 7 understudies. Practice here with MCQ Questions to score great marks in tests and clear your questions. Overhaul every one of the ideas effectively by taking assistance from the MCQ Questions of Soil with Answers are arranged dependent on the most recent exam pattern. Practice the Multiple choice Questions of Science Class 7 consistently Thus, that you can endeavor the board tests with most extreme certainty. Work on your speed and exactness in the test with predictable act of Science Objective type Questions with Answers. Practice MCQs for Class 7 Science with Answers consistently and score well in exams. Practice MCQ Questions for Class 7 Science 1. Which one of the following is a step in the formation of soil? (a) Earthquakes or volcanic eruptions 2. In which horizon of soil minerals are found? (a) A 3. Which of the following type of soil will form a colloidal solution when suspended in water? (a) Clay 4. Which factor influences soil formation? (a) Climate 5. The proportion of sand, silt and clay in a soil sample determines (a) structure 6. The microorganisms present in the soil require moisture (water) and nutrients for growth and survival. Choose from the options below the habitat (place) where the soil has plenty of water and nutrients. (a) Desert 7. Soil conservation measures are mainly aimed at protecting which of the following? (a) Plants 8. Soil is the substance which makes up the _________ of the earth. (a) rock 9. Which of the following does not cause soil erosion? (a) Deforestation 10. The best top soil for growing plants is (a) sandy soil 11. The mixture of rock particles and humus is called (a) soil 12. One of the following is not a type of soil. This one is (a) loamy soil 13. Which of the following has smallest size soil particles? (a) Gravel 14. Cotton grows well in (a) black soil 15. Which of the following cannot prevent soil erosion? (a) Reforestation 16. Sandy soils are found in (a) hilly areas 17. _________ are soils in which more than half of the parent mineral matter is volcanic ash and appear very dark in colour. (a) Desert soil 18. A well-developed soil profile is the result of: (a) physical process 19. Soil contains rock particle and_______. (a) water and air 20. Soil best suited for cultivation of wheat, rice and sugarcane is (a) Alluvial soil 21. Humus refers to the: (a) top most layer 22. Clay particles are of size (a) More than 0.004 mm 23. Assertion: The hills with dense vegetation cover do not experience heavy soil erosion. Reason: The vegetation cover helps infiltration of rainwater and binding of soils. (a) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion 24. In India laterite soil is found in (a) Bihar 25. __________ should be banned to prevent soil pollution. (a) Fertilisers Answer: 1. Answer: (b) Weathering of rocks Explanation: Weathering of rocks is a step in the formation of soil because the basis of the formation of soil is soil minerals which are produced from the rocks. 2. Answer: (a) A Explanation: Topsoil that is the A horizon is the layer of soil that is located just below the O Horizon. This layer consists of minerals and decomposed organic matter. 3. Answer: (a) Clay Explanation: Clay soil will form a colloidal solution when suspended in water. 4. Answer: (d) All of these Explanation: Formation of soil is called pedogenesis. Soil formation is the process of soil formation from its parental material. In addition to the soil parent material, soil formation is also dependent upon other prevailing processes like climate, relief, etc. 5. Answer: (b) texture Explanation: Texture refers to the size of the particles that make up the soil. The terms sand, silt, and clay refer to relative sizes of the soil particles. The combined portions of sand, silt, and clay in a soil determine its textural classification. 6. Answer: (b) Forest Explanation: In the forest, plenty of plants and trees are grown. Because of plants and trees, in the forest moisture and nutrients are sufficient. It helps to promote the expansion of micro-organisms. 7. Answer: (b) Topsoil Explanation: The soil conservation measures are mainly aimed at protecting the topsoil. It is the nutrient-rich soil with humus and is fertile in nature that helps the plants to grow. 8. Answer: (c) surface Explanation: Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life. Earth's body of soil, called the pedosphere, has four important functions: as a medium for plant growth. as a means of water storage, supply and purification. 9. Answer: (b) Solid wastes Explanation: Soil erosion occurs when the weathered soil particles are dislodged and carried away by wind or water. Deforestation, agricultural development, temperature extremes, precipitation including acid rain, and human activities contribute to this erosion. Humans speed up this process by construction, mining, cutting of timber, over cropping and overgrazing. It results in floods and cause soil erosion. 10. Answer: (b) loamy soil Explanation: The best topsoil for growing plants is loam. Loam is a mixture of sand, silt, clay and humus. It has the right water-holding capacity for plant growth. 11. Answer: (a) soil Explanation: The mixture of rock particles and humus is called the Soil. 12. Answer: (b) silty soil Explanation: Silty is not a type of soil. Sand, clay, silt, and humus in the proper amounts make up loamy soil. 13. Answer: (c) Clay Explanation: Clay has the smallest size of particles, less than 0.002 mm in diameter. 14. Answer: (a) black soil Explanation: Black Soil covers the Deccan plateau along the Godavari and Krishna valleys. This soil is rich in calcium carbonate, potash, magnesium, and lime making it ideal for growing cotton. 15. Answer: (b) Deforestation Explanation: Deforestation causes soil erosion. Deforestation causes soil erosion. 16. Answer: (c) deserts Explanation: In the desert, there are few plants to hold soil in place and little water. Instead, wind is the main way that the rock pieces are moved around. The wind cannot move all the pieces though, just the small lighter ones, so sand is left behind. Over a long time the deserts become mostly sand. 17. Answer: (b) Volcanic soil Explanation: They are often very rich in nutrients and hold water well because of their volcanic ash content. These soils are called Andisols, and they are often very young, and acidic depending on which type of volcano they come from. 18. Answer: (d) All of the above Explanation: The soil is a mixture of fine rock particles and organic matter. Chemical processes involve the weathering of rocks by chemical reactions. Organic or biological processes involve the weathering of rocks by biological agents such as lichens and mosses. 19. Answer: (c) minerals, organic matter, air and water Explanation: Soil composition refers to the nutrients and various other substances present in the soil. The basic components of soil are minerals, organic matter, water, and air. The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air.Hence In addition to the rock particles, the soil contains Minerals, organic matter, air, and water. 20. Answer: (a) Alluvial soil Explanation: Alluvial soils are ideal for the growth of sugarcane, paddy, wheat and other cereal and pulse crops. 21. Answer: (c) rotting dead matter in soil Explanation: The dark black upper layer of the soil is known as humus. It is the dead remains of plants and animals that have been decomposed by bacteria and fungi. This humus-rich soil increases the aeration capacity of soil and also helps in the penetration of roots of plants. The decomposition of organic matter helps in bringing the plant and animal residues back to the soil. 22. Answer: (d) Less than 0.002 mm Explanation: Starting with the finest, clay particles are smaller than 0.002 mm in diameter. Some clay particles are so small that ordinary microscopes do not show them. Silt particles are from 0.002 to 0.05 mm in diameter. 23. Answer: (a) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion Explanation: The roots of the plants bind the soil together, and interweave with other roots, forming a more solid mass that is less susceptible to both water and wind erosion. The removal of vegetation increases the rate of surface erosion. 24. Answer: (c) Kerala Explanation: Laterite has been derived from the Latin word ‘later’ which means brick. The laterite soil develops in areas with high temperature and heavy rainfall. These soils are mainly found in Karnataka, Kerala, Tamil Nadu, Madhya Pradesh, and the hilly areas of Orissa and Assam. This soil is very useful for growing tea and coffee. 25. Answer: (c) Plastics Explanation: necessary throw waste also contain food with plastic, when cattles hunt for their food they eat food along with plastic which can led to their death. plastic also cause soil pollution as plastic is not burn completely and it leaves residue. Click here for Practice MCQ Questions for Soil Class 7 |
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| 67. |
What happens if same type of crop is cultivated in same soil every year? A) Soil fertility increases B) Soil fertility decreases C) No change D) None of the above |
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Answer» Correct option is B) Soil fertility decreases |
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| 68. |
Read the statements: P : Water percolation rate is more to sandy soil.Q : Water percolation rate is more to loamy soil. A) Only P is correct B) Only Q is correct C) P & Q are correct D) P & Q are wrong |
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Answer» Correct option is A) Only P is correct |
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| 69. |
Which of the following is the topmost layer of soil? A) “O” Horizon B) “E” Horizon C) “A” Horizon D) “B” Horizon |
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Answer» Correct option is A) “O” Horizon |
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| 70. |
Why should we use clay idols instead of idols made of plaster of Paris? |
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Answer» 1. During festivals like Vinayaka Chavithi, we use idols of Ganesh made of plaster of Paris and chemical colors which causes severe damage to our environment. 2. Instead of these chemical idols we should use clay idols and celebrate festivals in an ecofriendly way. |
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| 71. |
Match the column:Column IColumn II(1) Coarse soil(a) Alluvium deposition(2) Regur soil(b) Eastern part of Bhandara(3) Laterite soil(c) Ajanta, Balaghat, Mahaden hills(4) Alluvial soil(d) Coastal belt of konkan(5) Yellow-brown soil(e) Weathering of basalt rock |
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Answer» 1 – c 2 – e 3 – d 4 – a 5 – b |
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| 72. |
Give one word for the following:The govt, scheme, work like construction of farm bunds, arresting waters of small streams, etc. |
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Answer» Answer is: Jalayukt Shivar. |
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