HARD
Earn 100

Explain how plants and animals are dependent on soil.       

Important Questions on Natural Resources-Air,Water and Land

EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
What are weathering force? How are they useful in agriculture? Explain.
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Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
On what factors do soil fertility depend?
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Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
Humus is formed by the action of insects on soil.
 
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
'Worms, insects and microbes increase soil fertility'. How?
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
Humus is important because it makes the soil fertile.
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation

What does the given picture show? 

Question Image

EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
Soil without humus cannot be fertile.
 
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
Neelam took 200 g soil. She placed it on a newspaper in the Sun and allowed it to dry for 2 hours. After drying it, she observed that the weight of the soil is reduced to 190g. Calculate the percentage of moisture in the soil sample.
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation

How would you show that soil contains water?        

EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
Bacteria and fungi help in the decomposition of dead plants and animals.
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Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
What is humus? Discuss it's importance.
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
Soil also contains some insects and micro-organisms.
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Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
Define Humus. 
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
While gardening, once Joy saw earthworms. He did not kill them and let them go. How do you think Joy’s action is worthwhile?
HARD
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
 A gardener in a park collects the leaf litter and burns them. Can you suggest a better method to clear the park of the leaf litter?
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Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
Why does the topsoil contain much more humus than the subsoil?
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
How can you prove that soil contains water?
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
How do small animals help the soil?
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
Fertility of the soil depends upon the amount of humus in it.
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Land and the process of soil formation
An animal that lives in the soil: