Class 8 Science - Chapter Conservation of Plants and Animals NCERT Solutions | Answer in brief: (a) Why should we cons
Answer in brief:
(a) Why should we conserve biodiversity?
(b) Protected forests are also not completely safe for wild animals. Why?
(c) Some tribals depend on the jungle. How?
(d) What are the causes and consequences of deforestation?
(e) What is Red Data Book?
(f) What do you understand by the term migration?
(a) Biodiversity may be defined as the variety of different life forms like plants, animals and microorganisms in an area. Both plants and animals are dependent on each other for the survival. They help each other by the exchange of gases. It means if we remove the one, then it will affect the survival of other organisms or species. To maintain a balance in nature we conserve biodiversity.
(b) Protected forests are also not completely safe for wild animals because as we know forests are the source of food and shelter. So, the people who live near the forests or who lives in the forests uses resources of forests to fulfil their own requirements. People get food, wood and many other things from the forests. People cut wood and kill animals and sell them for money.
(c) Some tribals depend on the jungle as they get food, shelter, fodder and fallen leaves from the jungle. These are their daily needs. So, the tribals depend on forests for their daily needs and for their survival too.
(d) Deforestation is the removal of trees.
Causes of deforestation are as follows:
- For wood, deforestation occurs.
- For cattle grazing.
- For expanding industrial area.
- For agricultural expansion.
Consequences of deforestation are as follows:
- Flooding
- Fewer crops
- Soil erosion
- Loss of biodiversity
- Increase in pollution
- Global warming
- Drought
- Green house effect
- Disturbance in water cycle (e) A book that contains the record of all the endangered species known as Red Data Book. IUCN maintained this Red Data Book. IUCN stands for International Union for Conservation of Nature and Natural Resources. (f) The movement of an organism or by a group of organism to other place from their original or natural habitat is known as migration. To avoid the extreme conditions of climate or for breeding migration is done by organism or by a group of organisms.
More Questions From Class 8 Science - Chapter Conservation of Plants and Animals
- Q:-
Discuss the effects of deforestation on the following:
(a) Wild animals
(b) Environment
(c) Villages (Rural areas)
(d) Cities (Urban areas)
(e) Earth
(f) The next generation - Q:-
Find out the information about the national parks in your state. Identify and show their location on the outline map of India.
- Q:-
Complete the word puzzle:
Down
1. Species on the verge of extinction.
2. A book carrying information about endangered species.
5. Consequence of deforestation.
Across
1. Species which have vanished.
3. Species found only in a particular habitat.
4. Variety of plants, animals and microorganisms found in an area.
- Q:-
Differentiate between the following:
(a) Wildlife sanctuary and biosphere reserve
(b) Zoo and wildlife sanctuary
(c) Endangered and extinct species
(d) Flora and fauna - Q:-
Why should paper be saved? Prepare a list of ways by which you can save paper.
- Q:-
In order to meet the ever-increasing demand in factories and for shelter, trees are being continually cut. Is it justified to cut trees for such projects? Discuss and prepare a brief report.
- Q:-
Explain how deforestation leads to reduced rainfall.
- Q:-
What will happen if:
(a) we go on cutting trees.
(b) the habitat of an animal is disturbed.
(c) the top layer of soil is exposed. - Q:-
How can you contribute to the maintenance of green wealth of your locality? Make a list of actions to be taken by you.
- Q:-
Fill in the blanks:
(a) A place where animals are protected in their natural habitat is called .
(b) Species found only in a particular area is known as .
(c) Migratory birds fly to far away places because of changes.
Popular Questions of Class 8 Science
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Fill in the blanks
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(b) The passage of an electric current through a solution causes ______________ effects.
(c) If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the terminal of the battery.
(d) The process of depositing a layer ofany desired metal on another material by means of electricity is called . - Q:-
Give two examples each of situations in which you push or pull to change the state of motion of objects.
- Q:-
Fill in the blanks:
(a) Friction opposes the _____________ between the surfaces in contact with each other.
(b) Friction depends on the _____________ of surfaces. (c) Friction produces __________.
(d) Sprinkling of powder on the carrom board ________ friction.
(e) Sliding friction is ___________ than the static friction. - Q:-
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- Q:-
Indicate whether the following statements are True (T) or False (F).
(a) Unicellular organisms have one-celled body. (T/F)
(b) Muscle cells are branched. (T/F)
(c) The basic living unit of an organism is an organ. (T/F)
(d) Amoeba has irregular shape. (T/F) - Q:-
Which of the following cannot be charged easily by friction?
(a) A plastic scale
(b) A copper rod
(c) An inflated balloon
(d) A woollen cloth. - Q:-
Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room. Explain.
- Q:-
What are the different ways in which water gets contaminated ?
- Q:-
Explain the importance of reproduction in organisms.
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