Social Science STD 6 Chapter 13: India: Earth Surface, Climate, Vegetation and Wild life - Exercises
1. Match the following pairs:
| A | B | Answer |
|---|---|---|
| 1. One horned-rhinoceros | (c) Assam | 1 - c |
| 2. Sea Turtles | (a) Sea shore of Odisha | 2 - a |
| 3. Migratory birds | (b) Wet land region | 3 - b |
2. State whether the given statements are true or false:
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1. Besides Gir, Lion is also seen in Nalsarovar.Answer: False
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2. West coast plain is narrower than east coast plain.Answer: True
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3. River Kaveri makes a delta region named Sundarvan.Answer: False
3. Answer in one-two lines each:
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1. Which rivers have formed the plain to the south of Himalaya?The vast, fertile plains to the south of the Himalayas are formed by the Ganga, Satluj, Yamuna, and Brahmaputra rivers and their tributaries.
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2. From where do migratory birds come to Gujarat?Migratory birds come to Gujarat from the colder regions of the world during the winter season to breed.
4. Answer in 3-4 lines each:
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1. What do you know about Mangrove forests?Mangrove forests grow in brackish water, where salty sea water mixes with fresh water. These forests are found along the coastal regions of West Bengal, Gujarat, and the Andaman and Nicobar Islands. The Sundarvan delta region, famous for its 'Sundari' trees, is a prime example of a Mangrove forest. Cher trees, found in coastal Gujarat, are used as fuel by the local population.
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2. Give information about Montane forests.Montane forests are found in mountainous regions. They contain various species of plants that grow at different heights. At altitudes of 1500 to 2500 meters, the vegetation is conical or has needle-shaped leaves, and is thus called Coniferous Vegetation. Trees such as Chid, Deodar, and Pine are common in these forests.
5. Give the explanation of the word:
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1. Migratory birdsMigratory birds are birds that travel from colder regions to our country during the winter season to breed and find food. They return to their native places once the winter is over. Thousands of these birds can be seen in places like Nalsarovar, Khijadiya, Thor, and Chhari Dhand in Gujarat.
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2. Autumn seasonThe autumn season is the period of the retreating monsoon. During this time, winds blow from the land towards the sea. Since these winds are dry, they do not bring rain. The sky is generally clear, and the temperature gradually increases, but it starts to drop again by the end of October.
6. Short note:
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1. Types of forestsThere are five main types of forests based on climate and precipitation. Tropical Rain Forests are found in areas with heavy rainfall, featuring dense, thick trees. Tropical Deciduous Forests are less dense and shed their leaves in autumn. Dry and Scrub Forests are found in regions with less rainfall and consist of thorny trees. Montane Forests grow in mountainous areas and contain conical-shaped trees. Finally, Mangrove Forests are found in the coastal regions where trees grow in saline water.
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2. Climate and seasons of IndiaIndia experiences a distinct seasonal cycle with four main seasons: winter (December to February), summer (March to May), monsoon (June to September), and the retreating monsoon season (October to November). Each season has unique characteristics. Winter is cold, with short days and diagonally falling sun rays. Summer is hot, with long days and vertical sun rays. The monsoon season brings rain from the humid south-west winds. The retreating monsoon season is a transition period with clear skies and a gradual decrease in temperature. This diversity of seasons is why India has a monsoon climate.