Human Environment Interactions:The Tropical and the Subtropical Region
I FILL IN THE BLANKS:
1. The place where a river flows into another body of water is called the river’s _________________
2. The _________________ of rivers Ganga and Brahmaputra together form the Ganga-Brahmaputra basin.
3. The _______________ lakes dot the Ganga-Brahmaputra Plain area.
4. The ____________ area provides the most suitable land for human habitation.
5. Thick ______________ groves are common in the Brahmaputra plain.
6. In West Bengal and Assam ______ is grown in plantations.
7. In the mountains and hills, where the slopes are gentle, crops are grown on ________________.
8. The Sunderbans delta area is covered with __________________ forests.
9. River Teesta is a tributary of the _____________________ River.
II NAME THE FOLLOWING:
1. Small rivers that join the main river. ___________________
2. A special kind of plant that store water in their leaves. ___________________
3. The number of persons that live in one sq. km. of area. _____________________
4. Two coniferous trees found in Brahmaputra Basin. _________ , ______________
5. The tributaries of River Ganga. ______________________________________
6. Large apartment like houses, in Amazon basin, with steeply slanting roof. ________
7. The major cities located on the banks of River Ganga. _____________________________________________
8. An important port on river Hooghly. ________________
9. Two cash crops grown in Ganga- Brahmaputra Basin. _______________________
10. The region which lies between 10 degree north and south. ___________________
III MATCH THE FOLLOWING:
Column A Column B
1. Piranha a. Cassava
2.One One–horned rhinoceros b. Blind Dolphin
3. Manioc c. Lucknow
4. Susu d. R. Amazon
5. Imambara e. Brahmaputra plain
IV ANSWER THE FOLLOWING QUESTIONS:
1. ‘Only shade tolerant vegetation grows in rainforests.’ Give reason.
• The rainforests are so thick that the dense ‘roof’ created by leaves and branches does not allow the sunlight to reach the ground.
• The ground remains dark and damp therefore only shade tolerant vegetation may grow in these forests.
2. Explain how topography plays a dominant role in the distribution of population.
• The mountainous areas with steep slopes have inhospitable terrain. Therefore, less number of people lives in mountainous areas.
• The plain areas provide the most suitable land for human habitation. The soil is fertile. Agriculture is the main occupation of the people. Therefore, the density of population is very high.
3. Write about the climatic conditions of the Ganga-Brahmaputra basin.
• The Ganga- Brahmaputra basin is dominated by monsoon climate, the monsoon brings rains from mid-June to mid-September.
• The summers are hot and the winters are cool.
4. Why do people practice terrace farming on hill slopes? Pg-61
• Terraces are built on steep slopes to create flat surfaces on which crop are grown.
• The slope is removed so that water does not run off rapidly.
5. ‘Developmental activities adversely affected the rainforests’. Justify theb statement.
• Development activities have led to gradual destruction of the biologically diverse rainforests.
• A large area of rainforests has disappeared in the Amazon basin.
• The top soil is washed away as the rain falls and the lush forest converts into a barren landscape.
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