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प्रश्न
Give reasons.
The rainforests are depleting.
उत्तर
There was a time when the green belt of rainforests covered about 12−14% of Earth’s land surface. Large-scale developmental activities have led to the clearing of large tracts of land in the rainforests (for example, clearing of land for agriculture, cattle pasture, wood, mining and road-building). Today, the rainforests cover only about 2−6% of the Earth’s land surface. Due to constant deforestation, the topsoil—which is held together by the trees—gets washed away as the rains fall. As a result, the once lush green forests change into barren landscapes.
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संबंधित प्रश्न
Tick the correct answer.
Manioc is the staple food of
Tick the correct answer.
Bengal tiger is found in
Match the following.
| (i) | Cotton textile | (a) | Assam |
| (ii) | Maloca | (b) | Terrace farming |
| (iii) | Piranha | (c) | Sericulture |
| (iv) | Silk worm | (d) | Slanting roof |
| (v) | Kaziranga | (e) | Ganga plain |
| (f) | Varanasi | ||
| (g) | Fish |
Map skills.
On the political map of South America, draw the equator. Mark the countries through which the equator passes.
Activity.
Collect under mentioned material and observe how destruction of trees affect the soil cover.
Material
(i) Three small flowerpots or food cans (e.g., cold drinks tin cans),
(ii) one big can with holes punched in the bottom (this will act as a sprinkling can),
(iii) twelve coins or bottle caps
(iv) soil.
Steps
Take three small cans or pots. Fill them with soil till the top. Press the soil to make it level with the top of the can. Now put four coins or bottle caps on the soil of each can. Take the big can that has been punched with holes and fill it with water. You can also take the sprinkling can from your garden. Now, sprinkle water on the three cans. On the first can sprinkle water very slowly so that no soil splashes out. Let moderate amount of water be sprinkled on the second can. On the third can, sprinkle the water heavily. You will observe that unprotected soil splashes out. Where the ‘rain’ is heavy the amount of soil that splashes out is the maximum and least in case of the first can. The coins or caps represent the tree covers. It is clear that if the land is cleared completely of the vegetation, the soil cover will quickly disappear.
Very Short Answer Type Question:
What type of vegetation grows in the Amazon forest?
Very Short Answer Type Question:
What do men and women of the rainforest do?
Very Short Answer Type Question:
What do the people of the rainforest grow?
Very Short Answer Type Question:
Name the cash crops that people of the rainforest grow.
Short Answer Type Question:
How can you say that the life of the people of the Amazon basin is changing?
