SEBA Class 8 Science Chapter 11 Conservation of Plants And Animals

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SEBA Class 8 Science Chapter 11 Conservation of Plants And Animals

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Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. SEBA Class 8 General Science Textual Solutions in English are part of All Subject Solutions. Here we have given Class 8 Science Textbook Question Answer, SEBA Class 8 Science English Medium Textbook Solutions for All Chapters, You can practice these here.

Conservation of Plants And Animals

Chapter: 11

PART – II

EXERCISE

Fill in the blanks.

(a) A place where animals are protected in their natural habitat is called________.

Ans: Wildlife sanctuary.

(b) Species found only in a particular area is known as__________.

Ans: Endemic species.

(c) Migratory birds fly to far away places because of _________  changes.

Ans: Climatic.

2. Differentiate between the following.

(a) Wildlife sanctuary and biosphere reserve.

Ans: 

(b) Zoo and wildlife sanctuary.

Ans: 

(c) Endangered and extinct species.

Ans: 

(d) Flora and fauna.

Ans: 

3. Discuss the effects of deforestation on the following:

(a) Wild animals.

Ans: Wild animals: When forests are cut, animals lose their natural homes (habitats). They may die due to lack of food and shelter or may enter villages and towns in search of food, which can be dangerous for both humans and animals.

(b) Environment.

Ans: Environment: Trees help keep the air clean and the temperature balanced. Without trees, carbon dioxide increases, leading to global warming, less rainfall, and a disturbed natural balance.

(c) Villages (Rural areas).

Ans: Villages (Rural areas): Many villagers depend on forests for firewood, fruits, and clean water. Deforestation causes less water in wells and ponds, poor soil, and difficulty in farming and daily needs.

(d) Cities (Urban areas).

Ans: Cities (Urban areas): Forests help absorb pollution. Without trees, cities face more air pollution, higher temperatures, and floods during heavy rains, because trees are no longer there to hold the soil and absorb water.

(e) Earth.

Ans: Earth: Forests are home to many species. Deforestation leads to loss of biodiversity, climate change, and damage to the Earth’s natural system.

(f) The next generation.

Ans: Next generation: If we don’t stop cutting trees, our children will grow up in a world with less clean air, fewer wild animals, no forests, and a less healthy planet.

4. What will happen if.

(a) We go on cutting trees.

Ans: If we keep cutting trees without planting new ones, it will cause air pollution because trees clean the air by absorbing carbon dioxide and releasing oxygen. With fewer trees, there will be less oxygen, making the air unhealthy. It also leads to climate change (rising temperatures, unpredictable weather) and floods, as trees help absorb rainwater and hold the soil together.

(b) The habitat of an animal is disturbed.

Ans: An animal’s habitat is its home, where it finds food, water, and safety. If this home is destroyed by deforestation or pollution, the animal may die or be forced to move to human areas or unsafe environments. This can lead to conflict with humans or the animal becoming endangered or extinct.

(c) The top layer of soil is exposed.

Ans: The top layer of soil is rich in nutrients needed for growing plants. If trees are removed, this layer is left unprotected. Rain or wind can wash it away, which is called soil erosion. This makes the land less fertile, so crops cannot grow well, affecting farming and food supply.

5 Answer in brief.

(a) Why should we conserve biodiversity?

Ans: We should conserve biodiversity because all plants, animals, and microorganisms help keep nature balanced. They clean the air, water, and soil, and support each other. Without biodiversity, life on Earth would not be healthy or safe.

(b) Protected forests are also not completely safe for wild animals. Why?

Ans: Even though forests are protected by the government, some people may still enter secretly, cut trees, or hunt animals. This makes forests unsafe for wildlife even if they are officially protected.

(c) Some tribals depend on the jungle. How?

Ans: Tribal people live close to forests and depend on them for food (fruits, honey), wood (for fuel and shelter), medicine (from herbs), and water. Forests are a part of their life and culture.

(d) What are the causes and consequences of deforestation?

Ans: Causes: Cutting trees for wood, farming, roads, or buildings.

Consequences: Less rainfall, soil becomes poor, wild animals lose their homes, and pollution increases.

(e) What is Red Data Book?

Ans: Red Data Book is a special book that contains the names of animals and plants that are in danger of becoming extinct. It helps us know which species need protection.

(f) What do you understand by the term migration?

Ans: Migration means when birds or animals move from one place to another during certain seasons to find better food, weather, or a safe place to breed. Example: Siberian cranes come to India in winter.

6. 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.

Ans: Cutting trees to build factories and shelters is sometimes needed for development, but it is not always justified. Trees give us oxygen, prevent soil erosion, bring rain, and provide homes to animals. If we cut too many trees, it leads to deforestation, which causes climate change, floods, and loss of wildlife.

Instead of cutting too many trees, we should:

(i) Use land wisely.

(ii) Plant new trees where old ones are cut (reforestation).

(iii) Use already cleared land for new projects.

So, cutting trees without proper planning is not justified. We must protect forests and find eco-friendly ways to develop.

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

Ans: (i) Plant more trees in my school, park, or backyard.

(ii) Save water and avoid wasting paper.

(iii) Join tree plantation drives.

(iv) Tell others about the importance of trees.

(v) Avoid burning leaves; compost them instead.

(vi) Do not damage trees or pluck leaves unnecessarily.

(vii) Use eco-friendly products.

(viii) Help clean gardens and green spaces regularly.

(ix) Support local environmental groups.

(x) Take care of existing plants and trees.

8. Explain how deforestation leads to reduced rainfall.

Ans: Deforestation means cutting down trees. Trees release water vapor into the air through a process called transpiration. This helps form clouds and bring rain.

When we cut down trees:

(i) Less water vapor goes into the air.

(ii) Fewer clouds are formed.

(iii) This leads to less rainfall.

Also, without trees, the soil becomes dry and temperature rises, which also stops rain from falling properly.

So, deforestation directly affects rainfall and climate.

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

Ans: Some famous national parks in Assam are:

(i) Kaziranga National Park – famous for one-horned rhinoceros.

(ii) Manas National Park – a UNESCO World Heritage Site.

(iii) Nameri National Park – known for its birds and elephants.

(iv) Orang National Park – called ‘Mini Kaziranga’.

(v) Dibru-Saikhowa National Park – rich in biodiversity.

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

Ans: Paper should be saved because it is made from trees, and saving paper helps in reducing the cutting down of trees. This helps in protecting the environment, conserving natural resources, and reducing pollution caused during paper production. It also helps in saving energy and water used in paper manufacturing.

Here are some important ways to save paper:

(i) Use both sides of the paper while writing or printing.

(ii) Recycle used paper instead of throwing it away.

(iii) Avoid unnecessary printing – use digital formats when possible.

(iv) Reuse old notebooks and envelopes.

(v) Read e-books and newspapers online to reduce paper usage.

11. 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.

Ans: Down:

1. Endangered – Species on the verge of extinction.

2. Red Data Book – Book with endangered species info.

5. Drought – A consequence of deforestation.

Across:

1. Extinct – Species that have vanished.

3. Endemic – Found only in a particular place.

4. Biodiversity – Variety of life in one area.

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