Cycle of Erosion and Polycyclic Reliefs

Options:

1. Because the earth is very unstable.
2. Because of the availability of tectonic events.
3. Because of climatic changes.
4. Because of all of the above.

Correct Answer

Options:

1. The process of formation of a peneplain.
2. The process of formation of natural levees.
3. The disturbance in the cycle of erosion caused by tectonic events or climatic changes.
4. The disturbance in the cycle of erosion caused by high transporting capacity of rivers.

Correct Answer

Options:

1. Tectonic and climatic factors
2. Volcanic eruptions and climatic changes
3. Subsidence of oceanic bottoms and glaciation
4. Upliftment or subsidence of land areas and volcanic eruptions

Correct Answer

Options:

1. Rejuvenation
2. Polycyclic relief
3. Accidental relief
4. Interrupted cycle

Correct Answer

Options:

1. Gradual sequential changes in uplifted landmass
2. Renewed vigor of erosive capacity of rivers
3. Shortening of cyclic time due to positive movement of base level
4. Lengthening of cyclic time due to negative change in base level

Correct Answer

Options:

1. Polycyclic landforms
2. Juvenile landforms
3. Ideal landforms
4. Successive cycles of erosion

Correct Answer

Options:

1. The Appalachian Regions of the U.S. and Chotanagpur Region of India
2. The Gondwana land during Carboniferous period
3. The Pleistocene glaciation of the Northern Hemisphere
4. The deeply entrenched gorges and canyons within broad flat valleys

Correct Answer

Options:

1. Volcanic eruption and climatic changes
2. Increase in rainfall
3. Minor changes in climate
4. None of the above

Correct Answer

Options:

1. When fissure flow ceases, lavas are cooled and solidified, and new sets of streams are initiated
2. When the lavas are hot and fluid
3. When the monsoon climate sets in
4. None of the above

Correct Answer

Options:

1. It obliterates surface drainage and reliefs, resulting in permanent interruption and closure of the existing chapter of the existing fluvial cycle of erosion
2. It increases surface runoff and stream discharge
3. It slows down the cycle of erosion
4. None of the above

Correct Answer

Options:

1. Major changes in the climate of the concerned region
2. Minor changes in the climate of the concerned region
3. Volcanic eruptions
4. None of the above

Correct Answer

Options:

1. When the climate becomes extremely dry
2. When the climate becomes extremely cold
3. When either an arid cycle or a glacial or periglacial cycle sets in
4. All of the above

Correct Answer

Options:

1. It causes local interruption in the cycle by accelerating the rate of erosion (case of rejuvenation)
2. It causes a permanent closure of the current cycle of erosion
3. It slows down the cycle of erosion
4. None of the above

Correct Answer

Options:

1. Any change in the base level of erosion
2. Increase in rainfall
3. Volcanic eruption
4. None of the above

Correct Answer

Options:

1. Positive change (due to rise in sea-level) and negative change (due to fall in sea-level)
2. Positive change (due to increase in rainfall) and negative change (due to decrease in rainfall)
3. Positive change (due to volcanic eruption) and negative change (due to volcanic cooling)
4. None of the above

Correct Answer

Options:

1. Shortens the period of cycle of erosion and indicative of accelerated alluviation (deposition)
2. Lengthens the cyclic time and indicative of accelerated erosion (rejuvenation)
3. Results in permanent closure of the current cycle of erosion
4. None of the above

Correct Answer

Options:

1. A positive change in the base level of erosion
2. A negative change in the base level of erosion
3. A rise in sea level
4. A fall in sea level

Correct Answer

Options:

1. River capture
2. Rejuvenation
3. Eustatic movement
4. Tectonic uplift

Correct Answer

Options:

1. Increase in seawater temperature
2. Decrease in seawater salinity
3. Locking of seawater on the continents as thick cover of ice sheets
4. Increase in the amount of seawater

Correct Answer

Options:

1. River capture
2. Rejuvenation
3. Subsidence
4. Tectonic uplift

Correct Answer