Human Environment Interactions - The Tropical and Subtropical Region Class 7 Worksheet Geography

Q.1. What is the population density of Uttarakhand, West Bengal, and Bihar?

The population density of Uttarakhand is 189 while the density of West Bengal is 1029 and that of Bihar is 1102.

Q.2. Why and how terraces are built?

Terraces are built on steep slopes to create flat surfaces on which crops are grown. The slope is removed so that water does not run off rapidly.

Q.3. Where Ganga and Brahmaputra basin lies?

The basin lies in the sub-tropical region that is situated between 10°N to 30°N latitudes.

Q.4. Who was the first person to discover the Amazon River? 

Francisco de Orellana was a Spanish explorer who discovered the Amazon River.

Q.5. What are the cash crops grown by the people of Amazon Basin?

The cash crops grown by the people of Amazon Basin are coffee, maize, and cocoa.

Q.6. Where are Kaziranga and Manas wildlife sanctuaries situated?

Kaziranga and Manas wildlife sanctuaries are situated in Assam.

Q.7. What do people of the Amazon rainforest do?

People grow most of their food in small areas after clearing some trees in the forest. While men hunt and fish along the rivers, women take care of the crops. They mainly grow tapioca, pineapple, and sweet potato. As hunting and fishing are uncertain it is the women who keep their families alive by feeding them the vegetables they grow. They practice “slash and burn agriculture”.

Q.8. Why rainforests are depleting?

The developmental activities are leading to the gradual destruction of the biologically diverse rainforests. It is estimated that a large area of the rainforest has been disappearing annually in the Amazon basin. As a result of this destruction, the topsoil is washed away as the rains fall and the lush forest turns into a barren landscape.

Q.9. Why paddy is grown in the Ganga-Brahmaputra plains?

Since cultivation of paddy requires sufficient water, it is grown in the areas where the amount of rainfall is high. Ganga-Brahmaputra basin is good for cultivation of paddy as it receives good amount of rainfall.

Q.10. What are the main features of the Ganga Brahmaputra basin?

The plains of the Ganga and the Brahmaputra, the mountains and the foothills of the Himalayas, and the Sundarbans delta are the main features of this basin.

Q.11. What are the major cities located on the River Ganga?

The cities of Allahabad, Kanpur, Varanasi, Lucknow, Patna, and Kolkata are located along the River Ganga.

Q.12. What are the crops grown by the people of the Amazon Basin?

They mainly grow tapioca, pineapple, and sweet potato. Cash crops like coffee, maize, and cocoa are also grown.

Q.13. What are bromeliads?

Bromeliads are special plants that store water in their leaves. Animals like frogs use these pockets of water for laying their eggs.

Q.14. Amazon Basin is extraordinarily rich in the variety of life found here. Discuss.

The rainforest is rich in fauna. Birds such as toucans, hummingbirds, birds of paradise with their brilliantly colored plumage, and oversized bills for eating make them different from birds we commonly see in India. These birds also make loud sounds in the forests. Animals like monkeys, sloths, and ant-eating tapirs are found here. Various species of reptiles and snakes also thrive in these jungles. Crocodiles, snakes, and pythons abound. Anaconda and boa constrictor are some of the species. Besides, the basin is home to thousands of species of insects. Several species of fishes including the flesh-eating Piranha fish are also found in the river. This basin is thus extraordinarily rich in the variety of life found there.

Q.15. How is tourism an important activity in the Ganga-Brahmaputra basin? 

Tourism is another important activity of the basin. Taj Mahal on the banks of River Yamuna in Agra, Allahabad on the confluence of the Rivers Ganga and Yamuna, Buddhists stupas in Uttar Pradesh and Bihar, Lucknow with its Imambara, Assam with Kaziranga and Manas with wildlife sanctuaries, and Arunachal Pradesh with a distinct tribal culture are some of the places worth a visit.