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Motion
The sources of water pollution are -:
(i) Fertilizers and pesticides used on farms.
(ii) Industries which use water for cooling and which dump the industrial wastes in the water bodies.
(iii) Sewage from the towns and cities.
(iv) Water released from dams.
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What is biosphere?
What are the physical components?
What is biotic component?
Does there exist any relationship between the climate and biotic components? If yes, explain with example.
What percentage of oxygen and nitrogen is present in the air?
Name the pollutants by which industries pollute air.
How is balance of carbon dioxide and oxygen maintained in the environment?
What is the percentage of carbon dioxide in the atmosphere of Venus and Mars?
What are the two main ways in which oxygen is consumed and carbon dioxide is produced?
What are the two ways in which carbon dioxide is fixed to keep its percentage almost constant?
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