Important Questions for CBSE Class 9 Social Science Natural Vegetation and Wildlife

Important Questions for CBSE Class 9 Social Science  Chapter 5 Natural Vegetation and Wildlife

Important Questions

Very Short Answer Type Questions (1 Marks Each)
Question.l. What is natural vegetation or virgin vegetation?
Answer. It refers to a plant community which has grown naturally without human aid, and has been left undisturbed by human beings for a long time.

Question.2. What is flora and fauna ?
Answer. Flora – Plants of a particular region or period.
Fauna – The species of animals.

Question.3. “Land and soil affects the natural vegetation directly and indirectly.” Justify by giving two examples.
Answer. (i) The sandy soil of the desert support
cactus and thorny bushes.
(ii) Wet,marshy,deltaic soil supports mangroves.

Question.4. What is an ecosystem ?[CBSE 1997]
Answer. The interdependence of species of plants and animals in a given area fdhns a single ecosystem.

Question.5. Name two non-flowering plants.
Answer. Ferns, algae and fungi.

Question.6. Name, any two factors that form the flora and the fauna ?
Answer. Soil, relief, climate and drainage.

Question.7. What is a biome ? [CBSE 2014]
Answer. A very large ecosystem on land having distinct types of vegetation and animal life is called a biome.

Question.8. Mention any two regions having tropical evergreen forests.
Answer. The Western Ghats, plains of West Bengal and Odisha, and the north-eastern India.

Question.9. Name two commercially useful trees of the Tropical Rain Forests.
Answer. Ebony, mahogany and rosewood.

Q.10. Mention any two factors responsible for deforestation.
Answer. (i) Overgrazing by animals
(ii) Careless management of forests

Question.ll. Where are the rhinoceros found?
[CBSE 1995F]
Answer. In swampy and marshy lands of Assam and North-West Bengal. .

Question.12. The ‘Tropical Rain forests appear green all the year round.’ Give reason. [CBSE2014]
Answer. There is no definite time for trees to shed their leaves.

Question.13. Which are the most widespread forests of India ?
Answer. Tropical Deciduous Forests.

Q.14. On the basis of the availability of water, tropical deciduous forests are divided into two parts. What are these two Categories ?
Answer. Dry deciduous and Moist deciduous.

Question.15. Name one important trees each of the Moist Deciduous and Dry deciduous Forests.
Answer. Moist Deciduous – Teak.
Dry Deciduous – Sal.

Question.16. Name any two useful trees of the Thorn Forests.
Answer. Kikar, babul, khair and date palm.

Question.17. Name any two trees of the Alpine Forests.
Answer. Silver fir, pine and junipers.

Question.18. How many species of birds and fish are known ?
Answer. Fish- About 2500 and Birds-Around 1200

Question.19. Where are the wild asses found in India? [CBSE 2000]
Answer. In Rann of Kachchh (Gujarat) and Rajasthan.

Question.20. Which is the natural habitatof
(i) Indian lion
(ii) Tigers
Answer. (i) India lions -Gir forests of Gujarat,
(ii) Tigers – Forests of Madhya Pradesh.

Q.21. Explain with example how temperature can affect the type of . vegetation ?
Ans. On the slopes of the Himalayas, and hills of the Peninsula above, the height of 915m, the fall in the temperature affects the types of vegetation, an£ its growth and changes it from tropical to subtropical temperature in the alpine vegetation.

Question.22. Name two areas where the thorn and the scrub forests are formed.
Answer. Punjab plains, Northern Madhya Pradesh, South-West Uttar Pradesh, (Bundelkhand plateau).

Question.23. Name any two biosphere reserves.
[CBSE 1999]
Answer. Nilgiri (Tamil Nadu, Kerala and Karnataka), Nanda Devi (Uttarakhand).

Question.24. Name two endangered species of wildlife. [CBSE 1998]
Answer. Tiger and rhinoceros.

Question.25. How are the habitats of camels and those of one Horned rhinoceros diametrically opposite to each other ? [CBSE 2000(C)]
Answer. Camels are found in Rajasthan where as the one-homed rhinoceros are found in Assam and North-West Bengal.

Question.26. Name any two states of India where elephants are found.
Answer. Assam, Kerala and Karnataka.

Question.27. Name any two biosphere reserves of India and their location.
Answer. (i) Manas – Assam
(ii) Sundarbans – West Bengal

Question.28. What is India’s rank in the world and in Asia in plant diversity ?
Answer. In the world – Tenth In Asia – Fourth.

Question.29. Name any one medicinal plant.
Answer. Neem

Question.30. Why are the leaves of the Thorn forests small and stems succulent ?
Answer. Leaves of the Thom Forests are mostly small to minimise evaporation, and the stems are succulent to conserve water.

Question.31. Where is the Alpine Vegetation found ?
Answer. At high altitudes, generally more than 3,600 metres above the sea-level.

Question.32. How many species of animals does India possess ?
Answer. More than 90,000 species of animals.

Question.33. What are endangered species ?
Answer. The plant and animal species which are in danger of getting extinct are called the endangered species.

Question.34. How many plant species are endangered ?
Answer. About 1300 plant species are endangered.

Question.35. Carefully study the given picture, and identify the type of vegetation. Mention one feature of that vegetation.

Answer. Thom forests and scrubs
The vegetation is found in regions with less than 70 cm of rainfall.

Question.36. Name any two states where tigers are found.
Answer. Madhya Pradesh and West Bengal.

Short Answer Type Questions (3 Marks)
Question.l. Why does India possess a great variety of flora and fauna ?
[CBSE 2(T15]
Answer. (i) Different types of soil: India has almost all major types of soils. It has alluvial soil which is very fertile, black soil, laterite soil, desert and mountain soil. The sandy soils of the desert support cactus and thorny bushes while wet, marshy deltic soils support mangroves and deltic vegetation.
(ii) Different climatic conditions: Different climatic conditions prevail in India. At some places, the temperature is at 55°C and at other,
it is about – 45°C. So it supports all types of plants. Some places receive a rainfall of more than 1000 cm, and some receive only 50 cm. This also helps in growing different type of plants.
(iii) Sunlight : Sunlight is one of the important factors responsible for the growth of vegetation. Due to the longer duration of sunlight, trees grow faster in most parts of India.
(iv) Precipitation : Precipitation also plays a vital role in the growth of different types of vegetation. Tropical rainforests are found in the Western Ghats due to heavy rainfall.

Question.2. Distinguish between Tropical Evergreen and Deciduous forests JCBSE 2013,14]
Answer.

Question.3. Write any two points of difference between
(i) Dry deciduous
(ii) Moist deciduous.
Answer.

Question.4.Mention any four characteristics of the thorny forests water.
Answer. (i) This type of vegetation is found in regions with less than 70 cm of rainfall.
(ii) This type of vegetation is found in the north-western part of the country including the semi-arid areas of Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Uttar Pradesh and Haryana.
(iii) Acacias, palms, euphorbias and cacti are the main plant species.
(iv) Trees are scattered, and have long roots penetrating deep into the soil in order to get moisture.
(v) The stems are succulent to conserve
(vi) Leaves are mostly thick, and small to minimise evaporation. .

Question. 5. Mention any four characteristics of the mangrove tidal forests.[CBSE2015]
Answer. (i) The mangrove tidal forests are found in the areas of coasts influenced by tides. Mud and silt get accumulated on such coasts.
(ii) Dense mangroves are the common varieties with roots of the plants submerged under water.
(iii) The deltas of the Ganga, the , Mahanadi, the Krishna, the Godavari and the Kaveri are covered by such vegetation.
(iv) In the Ganga-Brahamputra delta, the sundari trees are found, which provide a durable hard timber. Palm, coconut, keora, agar also grow in some parts of the delta.

Question. 6. Write three steps taken by the government for the protection and conservation of great biological diversity of India. [CBSE 2013,14]
Answer. (i) Various biosphere reserves have been set up in various parts of India. For
example the Nilgiri at Karnataka, Tamil Nadu and Kerala, Nanda Devi in Uttarakhand, etc.
(ii) About 99 national parks, 513 wildlife sanctuaries, and 35 zoological gardens have been set up.
Financial and technical assistance is provided to many Botanical Gardens set up by the government.

Long Answer Type Questions (5 Marks)

Question.l. Describe the altitude zones of vegetation in the mountainous regions. .
Or
“The mountainous region of India exhibits a succession of natural vegetation belts from tropical to tundra types, all compressed into an altitude of six kilometres or so”. Elaborate the above statement with four examples from different altitudinal belts. *
Or
Describe the major vegetation zones of the Himalayan region.
Or
In mountainous area, there is change in natural vegetation due to decrease in temperature. Justify giving examples from different zones. [CBSE March 2011 ]
Answer. In the Himalayan region of our country, the vegetation differs according to the height.
(i) In the foothill, (the Shiwalik) are tropical deciduous forests. ‘Sal’ is the most important species of economic significance. ,
(ii) The zone with altitude 1000 m – 2000 m consists of evergreen forests. Beech, chestnut, oak, ash, etc., are the main trees. These at a higher altitude are replaced by ‘chir’ and ‘chil’.
(iii) The zone between 1500m – 3000 m includes pine, cedar, silver fir and spruce. They are the famous coniferous trees, typical of the dry temperate region found in the inner Himalayan region.
(iv) At the height of 3600 m or more, shrubs, scrubs, and grasses of alpine variety are found.

Question.2. Write three steps taken by the government for the protection and conservation of great biological diversity of India. [C.B.S.E 1999]
Or
Give any three steps taken by the government of India to protect the flora and fauna.
[CBSE March 2011, 2012]
Answer. (i) Various biosphere reserves have been set up in various parts of India. For example, the Nilgiri at Karnataka, Tamil Nadu, and Kerala, Nanda Devi in Uttarakhand, etc.
(ii) About 100 national parks, 515 wildlife sanctuaries, and 35 zoological gardens have been set up.
(iii) The endangered species are being identified and special efforts are being made to preserve them. For example: Tiger Project’.
(iv) Killing of wildlife has been banned and special forest officers have been appointed.

Higher Order Thinking Skills (Hots) Questions/Application Based Questions

Question.l. Carefully study the given table and answer the following questions :

(i) Is there any relationship between temperature and type of vegetation ?
Answer. Yes, thie fall in temperature affects the type of vegetation and its growth and changes it from tropical to subtropical.
(ii) Identify the type of vegetation you can expect in zone D.
Answer. Alpine.
(iii) Is temperature the only criteria for all types of vegetation ?
Answer. No, vegetation also depends on rainfall, humidity, and altitude.

Question.2. Study the given bar graph carefully, and answer the following questions to which state has the highest area under forests ?
(i) Which state has the highest area under forests ?
(ii) Name any two states which have more than 80% of the area under forests ?
(iii) Which Union territory has the highest area under forests ?
(iv) Name any two states having very low area under forests.

Answer. (i) Nagaland
(ii) Nagaland and Mizoram
(iii) Andaman and Nicobar Islands
(iv) Punjab and Haryana

Value Based Questions

Question.1. Mention any two values which are reflected by the ecosystem?
Ans. Importance of interdependent and interrelationship.

Question.2. How do the human beings influence the ecology of a region ?
Answer. The greed of human beings leads to over utilisation of these resources. They cut the trees and kill the animals creating ecological imbalance.

Question.3. What are the major factors responsible for the threat to the nature ? Mention any two.
Answer. (i) Destruction of habit (ii) Human predation.

Question.4. What is the importance of awlwmlg for us?
Answer. (i) Animals provide us meat,eggs etc.
(ii) Fish provide us nutritive food.
(iii) Many insects helps in pollination of crops.
(iv) Animals are important part of our ecosystem.
(v) Animals skin is used to prepare leather

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