answer the following:1. Name the forces working on the earth's crust. 2. What are epeirogenic movements? 3. What are orogenic movements ? 4. What is a mountain ? 5. Give any two examples of Young Fold mountains. 6. Give two examples of Old Fold mountains. 7. Give two examples of Block Mountains. 8. Which .type of mountains are formed due to faulting ? 9. What is plateau ? Name its types. 10. What is intermontane plateau ? 11 . What are plains ? 12. Name any two delta plains. 13. How are loess plains formed ? 14. How are drift plains formed .
Answers
Answer:
1. 2 types of for es on the earth's crust are
- epeirogenic or vertical movement
- organic or horizontal movement
2. AP organic aur continental forming movement act along the radius of the earth there are also called radium movements their direction maybe towards or away from the centre of the Earth day take place over a broad areas and a relative slower than organic movements
3. horizontal movement also known as organic movements are mountain building movements they are caused by compressional and Jensen forces acting on the surface of the earth the resultant folds and faults create mountains of varying origin
4. a portion of lands office rising constructively above the surrounding country neither as a single eminent or in a range or chain is called a mountain
5. two examples of young fold mountains are
- the Himalayas
- the circum Pacific Oceanic mountains.
6. two examples of old fold mountains are
- caledonian and hercynian mountain of Central Europe
- the printonit mountains
7. two examples of block mountains are
- Sierra Nevada in California
- the Tetons in Wyoming
8. Block mountains are also called fault-block mountains since they are formed due to faulting as a result of tensile and compressive forces.
9. They are one of the four major landforms, along with mountains, plains, and hills. There are two kinds of plateaus: dissected plateaus and volcanic plateaus
10. Plateaus surrounded by mountain ranges are called intermontane plateaus. '
11. relatively flat and low lying land surface with least difference between its highest and lowest point is called a plain
12. Sundarban delta and Nile delta are examples of delta plains.
13. When glaciers grind rocks to a fine powder, loess can form. Streams carry the powder to the end of the glacier. This sediment becomes loess.
14. The drift plains are forms when a sheet of ice becomes detached from the main body of glacier and melts in place depositing the sediments it carried.