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Question
State two evidences that the Earth movements have taken place in the past.
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Solution
The evidences that the Earth movements have taken place in the past are as follows :
- The basins containing sedimentary rocks indicate that such basins must have been below sea level in the past. The coalfields of the Damodar valley occur in such basins of the geological past.
- Oilfields occur in basins containing old sedimentary rocks. Such basins are now occurring on the land. This shows that the portion of the crust which was once depressed must have been uplifted later.
- llie Himalayas provide another evidence of the recent effect of Earth movements.
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Name four relief features on the surface of the earth.
An extensive area of lowland with a level or gently undulating surface.
The vertical movements which are the result of faults and cracks in the surface of the earth.
Why and how are the plains the centres of all human activity?
What causes Orogenic movements?
What are Block mountains?
Describe important volcanic landforms on earth.
Match the following
| 1. | Breaking and crumbling of rocks | Glacier |
| 2. | Abandoned meander loops | Barchan |
| 3. | Large body of moving ice | Lagoon |
| 4. | Crescent shaped sand dunes | Weathering |
| 5. | Vembanad lake | Oxbow lake |
Fill in the corresponding columns with reference to the landform features given below
Barchan, ‘V’ Shaped valley, Cliff, Arete, Inselberg, Moraine, Alluvial fan, Lagoon
| S.No | Natural Agents | Landforms | |
| Erosion | Deposition | ||
| 1. | River | ||
| 2. | Glacier | ||
| 3. | Wind | ||
| 4. | Sea wave | ||
Identify any one of the following features near your home town and write a note on them.
1. Hill
2. Waterfall
3. River (or) stream
4. Beach.
