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प्रश्न
Give reasons.
Sea caves are turned into stacks.
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उत्तर
Sea waves strike at the rocks. As a result cracks develop which become bigger over time and hollow like caves are formed on the rocks. They are called sea caves. These cavities become bigger and bigger and a time comes when only the roof of the caves remain to form sea arches. Further erosion breaks the roof and only walls are left. These wall like features are called stacks. In this way, sea caves are turned into stacks.
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संबंधित प्रश्न
What are exogenic forces?
How are flood plains formed?
How are beaches formed?
Tick the correct answer.
Which is not an erosional feature of sea waves?
Match the following
| A | B | ||
| (i) | Glacier | (a) | Sea shore |
| (ii) | Meanders | (b) | Mushroom rock |
| (iii) | Beach | (c) | River of ice |
| (iv) | Sand dunes | (d) | Rivers |
| (v) | Waterfall | (e) | Vibrations of earth |
| (vi) | Earthquake | (f) | Sea cliff |
| (g) | Hard bed rock | ||
| (h) | Deserts | ||
Give reasons.
Some rocks have a shape of a mushroom.
Observe the photographs given below. These are various features made by ariver. Identify them and also tell whether they are erosional or depositional or landforms formed by both.
Observe the photographs given below. These are various features made by ariver. Identify them and also tell whether they are erosional or depositional or landforms formed by both.
Mention the work of ice.
Solve the crossword puzzle with the help of given clues
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| 16 |
Across
2. Loop like the bend of a river
4. Solid form of water
7. Moving mass of ice
9. Sudden descent of water in the bed of a river
11. Natural cavity on weak rocks formed by action of waves
12. Embankment on a river that keeps it in its channel
13. Large body of sea water
14. Dry area where sand dunes are found
15. Small hill of sand caused by the action of the wind
16. Flat plain formed by river deposits during time of flood
Down
1. Rise and fall of water caused by friction of wind on water surface
3. Flow of water in a channel
5. Steep perpendicular face of a rock along a sea coast
6. Debris of boulder and coarse material carried by glacier
8. Crescent shaped lake formed by a meandering river
10. Fine sand deposited by the action of the wind
13. Isolated mass of rising steep rock near a coastline
14. Alluvial tracts of land formed by the river deposits at the mouth of a river
