Ncert solutions science class 8 Solutions for Chapter 7 conservation of plants and animals

A place where animals are protected in their natural habitat is called ________ .

Migratory birds fly to faraway places because of ________ changes.

(climatic/non-climatic)

Q1) 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.

Wild buffalo is an endangered species because

(a) its population is diminishing

(b) it has become extinct

(c) it is found exclusively in a particular area

(d) its poaching is strictly prohibited

Q2) Differentiate between the following.

(a) Wildlife sanctuary and biosphere reserve

(b) Zoo and wildlife sanctuary

(c) Endangered and extinct species

(d) Flora and fauna

Differentiate between the following.

(a) Wildlife sanctuary and biosphere reserve

(b) Zoo and wildlife sanctuary

(c) Endangered and extinct species

(d) Flora and fauna

Which one of the following changes may occur due to desertification?

(a) Decrease in atmospheric temperature.

(b) Increase in water holding capacity of soil.

(c) Increased chances of floods.

(d) Conversion of fertile land into a desert.

Q3) 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

Which one of the following statements is true about a Biosphere Reserve?

(a) It is a protected area where only endemic species live.

(b) It is meant only for the conservation of plants and animals.

(c) It is meant to conserve both, the biodiversity and the culture of that area.

(d) There are no other protected areas within its limits.

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

The place meant for conservation of biodiversity in their natural habitat are

(i) Zoological garden

(ii) Botanical garden

(iii) Wildlife sanctuary

(iv) National park

(a) i & ii;

(b) ii & iii;

(c) iii & iv;

(d) i & iv

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

Q4) 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.

Which one of the following statements is true about endemic species?

(a) They are found exclusively in a specific habitat.

(b) Endemic species can never become endangered.

(c) They are found only in zoos and botanical gardens.

(d) They are not affected by the destruction of their habitat.

Q5) 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?

Q6) 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.

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.

Which of the following feature is correct for a wildlife sanctuary?

(a) It is an artificially created protected area for animals.

(b) It is a protected area for threatened and endangered wild animals.

(c) It is meant for conservation of only plant species.

(d) Capturing and poaching of animals is strictly prohibited here.

Q7) How can you contribute to the maintenance of green wealth of your locality? Make a list of actions to be taken by you.

Which statement is incorrect about endangered species?

(a) Their number has decreased drastically.

(b) They might become extinct in the near future.

(c) They pose a danger to other animals.

(d) Their natural habitat needs to be protected

How can you contribute to the maintenance of green wealth of your locality? Make a list of actions to be taken by you.

Q8) Explain how deforestation leads to reduced rainfall.

Explain how deforestation leads to reduced rainfall.

What do blackbuck, elephant, python, and golden cat together represent in a forest?

(a) fauna

(b) flora

(c) ecosystem

(d) species

Find out about national parks in your state. Identify and show their location on the outline map of India.

Q10) Find out about national parks in your state. Identify and show their location on the outline map of India.

The Red Data Book keeps a record of all the

(i) endemic species.

(ii) extinct species.

(iii) endangered plants

(iv) endangered animals.

(a) i & ii;

(b) ii & iii;

(c) iii & iv;

(d) i & iv

Q10) Why should paper be saved? Prepare a list of ways by which you can save

paper.

Why should paper be saved? Prepare a list of ways by which you can save paper.

Migratory birds fly to faraway areas during a particular time of a year. Which of the following conditions present in their habitat during that time are responsible for this behaviour?

(i) Unavailability of food.

(ii)Extreme weather conditions.

(iii) Overcrowding.

(iv) Lack of nesting areas.

(a) ii & iii;

(b) i & ii;

(c) i & iv

(d) ii & iv.

Complete the word puzzle.

Down

1. Species on the verge of extinction.
2. A book carrying information about endangered species.
3. Consequences of deforestation.

Across

4. Species which have vanished.
5. Species found only in a particular habitat.
6. Variety of plants, animals and microorganisms found in an area.

Q11) Complete the word puzzle.

Down

1. Species on the verge of extinction.
2. A book carrying information about endangered species.
3. Consequence of deforestation.

Across

4. Species which have vanished.
5. Species found only in a particular habitat.
6. Variety of plants, animals and microorganisms found in an area.

In our country, large patches of forests are being cleared for cultivation of crops. The environmental impact of such a practice will lead to

(a) soil erosion

(b) soil conservation

(c) soil pollution

(d) soil fertility

Why is it important to conserve forests?

Mention any one action that you have undertaken to conserve trees

State whether the following statements are True or False. Correct the false statements.

(i) There can be a wildlife sanctuary within a biosphere reserve.

(ii) Plants of a particular area are collectively termed as fauna.

(iii) Deforestation leads to an increase in the water holding capacity of the soil.

(iv) Bison is an endemic fauna of Pachmarhi Biosphere Reserve.

Can a forest regenerate naturally in a short period of time?

Name the first Reserve Forest of India.

Why are wildlife sanctuaries important for the conservation of plants and animals?

Why are endemic organisms in greater danger of becoming extinct?

How are even small animals important in an ecosystem?

A new species X is introduced in a forest. How is it likely to affect the local species of that area?

Does soil erosion affect the fertility of soil? How?

What is the unique feature of the biodiversity found in Panchmarhi Biosphere Reserve?

Mention the aim of the Forest (Conservation) Act.

What is biodiversity?

Is deforestation associated with global warming? Explain.

How does deforestation lead to frequent floods and droughts?

Why should we save paper?