(7) Why is our earth more colourful and full of life than the other planets of the solar system.?
(8)Mention any two uses of the sea. (9)“There is an unbroken chain of life in the sea.” Explain.
(10)How are humans responsible for the extinction of some species of sea creatures?
(11) Find words in the paragraph which mean the same as the following
(i) Wisely (Para 3)
(ii) Unfavorable (Para 7)
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Answers
Answer:
(7)Because it contains all the necessary resources needed for living.
(8)Sea is the home for sea animals and also salt can be produced from sea and it also maintains the balance of water and land on the Earth.
(9) It refers to the life cycle in the sea.
(10) Humans are responsible in many ways like rebuilding the habitat of animals and many more
Answer:
Explanation:
7. The Earth is the only planet which contains plenty of water. This had made our earth more colourful and full of life than the other planets of the solar system.
8. Uses of the sea:
- The sea is a potential source of protein which helps in controlling main nutrition.
- The sea gives food and shelter to many creatures.
9. Plankton or algae form the basis of the entire sea life. Like plant plankton there are also animal plankton, the smallest creatures of the sea. These animal planktons feed on the plant plankton and small fish. Arctic and Antarctic seas abound in plankton and in fish as well. Thus, there is an unbroken chain of life in the sea.
10. Humans, because of their greed hunted whales and some other creatures so recklessly that some of their species have either become extinct or are on the verge of extinction.
11. i) Judiciously
ii) Adverse.
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