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Science True False[1 Marks ]

Soil · Bihar Board (BSEB) STD 7 (BSEB - English Medium). 12 questions.

Questions

True False[1 Marks ]

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12 questions · self-marked practice — reveal the answer and mark yourself.

Question 21 Mark
Loamy soil also contains humus, and is, therefore, considered the best for the growth of plants. True/ False.
Answer
True.
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Question 31 Mark
Waste products and chemicals should be treated before they are released into the soil. True/ False.
Answer
True.
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Question 41 Mark
A-horizon is also known as subsoil. True/ False
Answer
False. Explanation: A-horizon is the uppermost layer and also known as topsoil.
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Question 71 Mark
Soil is formed by erosion. True/ False
Answer
False.
Explanation:
The soil is formed by the breaking down of jocks by the action of wind, water and climate. This process is called weathering.
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Question 91 Mark
The removal of upper surface of soil is called soil pollution. True/ False
Answer
False. Explanation: Soil pollution is when humans introduce harmful objects like polythene bags, plastics, chemicals, water products and pesticides in the soil in a way that causes harm to other living things or destroys soil ecosystem.
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Question 101 Mark
Sandy soil is used for making toys. True/ False
Answer
False.
Explanation:
Clayey soil is used for making toys.
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True False[1 Marks ] - Science STD 7 Questions - Vidyadip