Q1) A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper. He could not big beyond a depth 5 feet. Provide a suitable scientific
Q2) Continuously water-logged soils are disadvantageous for plant growth. Why?
Q3)Soil has particles of different sizes. Arrange the words given below in decreasing order of their particle size. Rock, clay, sand, gravel, silt
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Answers
Answer 1:- The soil surface has loose top soil which is easier to dig. At deeper layers partially weathered rocks or bedrocks are present which are hard making digging difficult.
Answer 2:- When soil is water logged, all the pore spaces are filled with water and oxygen is pushed out of the soil. Oxygen from the pore spaces move into the atmosphere. So, in water logged soil, the plants do not grow well as the roots of the plants do not absorb oxygen. This stops the respiration and production of energy.
Answer 3:- The words in increasing order of their particle size are clay, silt, sand, gravel and rock.
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Q1) A man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper. He could not big beyond a depth 5 feet. Provide a suitable scientific.
Ans: The upper layer of soil is loose and effortless to dig. He could not dig beyond a depth of 5 feet because as he digs deep, he found rocks and hard soil, which makes his digging difficult.
Q2) Continuously water-logged soils are disadvantageous for plant growth. Why?
Ans: When soil is water logged, all the pore spaces are filled with water and oxygen is pushed out of the soil. Oxygen from the pore spaces move into the atmosphere. So, in water logged soil, the plants do not grow well as the roots of the plants do not absorb oxygen. This stops the respiration and production of energy.
Q3) Soil has particles of different sizes. Arrange the words given below in decreasing order of their particle size. Rock, clay, sand, gravel, silt.
Ans: The words in increasing order of their particle size are clay, silt, sand, gravel and rock.