Class 9 Science - Chapter Natural Resources NCERT Solutions | How are living organisms dependent on th
How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?
Almost all living organisms are directly or indirectly dependent on soil. Plants obtain water, minerals from the soil and prepare food for animals.
On the other hand, other organisms that live in water are not totally independent of soil because the microbes growing on the soil in water are the primary producers which start the food chain and even microbes that live in the soil help in the decomposition of dead plants and animals in water to return the nutrients back to the water.
More Questions From Class 9 Science - Chapter Natural Resources
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List any three human activities that you think would lead to air pollution.
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What causes winds?
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Why is the atmosphere essential for life?
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Why do organisms need water?
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Why is water essential for life?
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We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?
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List any three human activities which would lead to an increase in the carbon dioxide content of air.
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How does the atmosphere act as a blanket?
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How is our atmosphere different from the atmospheres on Venus and Mars?
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You have seen weather reports on television and in newspapers. How do you think we are able to predict the weather?
Popular Questions of Class 9 Science
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Which of the following has more inertia: (a) a rubber ball and a stone of the same size? (b) a bicycle and a train? (c) a five-rupees coin and a one-rupee coin?
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State the universal law of gravitation.
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Which of the following are matter?
Chair, air, love, smell, hate, almonds, thought, cold, cold-drink, smell of perfume.
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A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (Fig. 11.3). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
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What is meant by a pure substance?
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How does the sound produced by a vibrating object in a medium reach your ear?
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In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium observations are in agreement with the law of conservation of mass.
sodium carbonate + ethanoic acid → sodium ethanoate + carbon dioxide + water
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What are canal rays?
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State any two conditions essential for good health.
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Who discovered cells, and how?
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State any two conditions essential for good health.
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Two objects of masses 100 g and 200 g are moving along the same line and direction with velocities of 2 m s-1 and 1 m s-1, respectively. They collide and after the collision, the first object moves at a velocity of 1.67 m s-1. Determine the velocity of the second object.
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A ball is thrown vertically upwards with a velocity of 49 m/s. Calculate
(i) the maximum height to which it rises,
(ii) the total time it takes to return to the surface of the earth. - Q:-
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Name the three sub-atomic particles of an atom.
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