MCQs on Delta and Delta Regions – World Geography,
Q1. What is a delta?
a. A mountain range
b. A low-lying landform composed of sediments deposited by a river
c. A deep ocean trench
d. A volcanic island
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Correct Answer: b. A low-lying landform composed of sediments deposited by a river
Explanation: A delta is a low-lying, almost flat landform, composed of sediments deposited where a river flows into a lake or an ocean.
Q2. Which of the following factors influence the formation of a delta?
a. River flow velocity
b. Sediment load
c. Wave and tidal action
d. All of the above
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Correct Answer: d. All of the above
Explanation: The formation of a delta depends on factors such as river flow velocity, sediment load, and wave and tidal action. A delta forms when the volume of sediment deposited at a river mouth is greater than what waves, currents, and tides can erode.
Q3. Which type of delta has a triangular or fan shape?
a. Arcuate delta
b. Cuspate delta
c. Bird’s foot delta
d. Estuarine delta
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Correct Answer: a. Arcuate delta
Explanation: Arcuate deltas have a triangular or fan shape, resembling the uppercase Greek letter delta (Δ).
Q4. Which type of delta is more pointed and tooth-shaped?
a. Arcuate delta
b. Cuspate delta
c. Bird’s foot delta
d. Estuarine delta
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Correct Answer: b. Cuspate delta
Explanation: Cuspate deltas are more pointed and tooth-shaped due to stronger wave action.
Q5. Which type of delta is characterized by multiple channels or distributaries extending into the ocean or lake?
a. Arcuate delta
b. Cuspate delta
c. Bird’s foot delta
d. Estuarine delta
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Correct Answer: c. Bird’s foot delta
Explanation: Bird’s foot deltas are characterized by multiple channels or distributaries extending into the ocean or lake, resembling the clawed foot of a bird. The Mississippi Delta is an example of a bird’s foot delta.
Q6. Which river forms an arcuate delta as it empties into the Mediterranean Sea?
a. Nile River
b. Amazon River
c. Ganges River
d. Mississippi River
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Correct Answer: a. Nile River
Explanation: The Nile River forms an arcuate delta as it empties into the Mediterranean Sea.
Q7. Which river forms a cuspate delta as it empties into the Tyrrhenian Sea near Rome, Italy?
a. Nile River
b. Amazon River
c. Ganges River
d. Tiber River
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Correct Answer: d. Tiber River
Explanation: The Tiber River forms a cuspate delta as it empties into the Tyrrhenian Sea near Rome, Italy.
Q8. Which river forms a bird’s foot delta in the Gulf of Mexico?
a. Nile River
b. Amazon River
c. Ganges River
d. Mississippi River
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Correct Answer: d. Mississippi River
Explanation: The Mississippi River forms a bird’s foot delta in the Gulf of Mexico.
Q9. Which of the following rivers forms a delta in the Bay of Bengal?
a. Nile River
b. Amazon River
c. Ganges-Brahmaputra River
d. Mississippi River
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Correct Answer: c. Ganges-Brahmaputra River
Explanation: The Ganges-Brahmaputra River forms a delta in the Bay of Bengal.
Q10. Which of the following is NOT a factor that influences the formation of a delta?
a. River flow velocity
b. Sediment load
c. Wave and tidal action
d. Distance from the equator
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Correct Answer: d. Distance from the equator
Explanation: The formation of a delta depends on factors such as river flow velocity, sediment load, and wave and tidal action, but not the distance from the equator.
Q11. Which of the following is a major function of deltas in the ecosystem?
a. Stopping water pollutants
b. Providing habitat for various life forms
c. Both a and b
d. None of the above
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Correct Answer: c. Both a and b
Explanation: Deltas play a crucial role in the ecosystem by acting as a natural sieve that stops water pollutants and providing habitat for various life forms such as crabs, oysters, mugwort, dolphins, and even tigers.
Q12. Which of the following is a characteristic of an abandoned delta?
a. River develops a new channel
b. River dries up or stagnates
c. Both a and b
d. None of the above
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Correct Answer: c. Both a and b
Explanation: An abandoned delta forms as a river develops a new channel, leaving the other to dry up or stagnate. This process is called avulsion.
Q13. Which of the following is a common feature of deltas?
a. High elevation
b. Fertile soil
c. Volcanic activity
d. Glaciers
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Correct Answer: b. Fertile soil
Explanation: Deltas are characterized by fertile soil, which is formed by the deposition of sediments carried by rivers.
Q14. Which of the following is NOT a type of delta?
a. Arcuate delta
b. Cuspate delta
c. Bird’s foot delta
d. Glacial delta
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Correct Answer: d. Glacial delta
Explanation: The main types of deltas are arcuate, cuspate, and bird’s foot deltas. Glacial delta is not a recognized type of delta.
Q15. In which country is the Ganges-Brahmaputra delta located?
a. India and Bangladesh
b. Egypt
c. Brazil
d. United States
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Correct Answer: a. India and Bangladesh
Explanation: The Ganges-Brahmaputra delta is located in India and Bangladesh.
Q16. Which of the following is a characteristic of the subaqueous part of a delta?
a. Located above the water’s surface
b. Located below the water’s surface
c. Composed of volcanic rocks
d. None of the above
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Correct Answer: b. Located below the water’s surface
Explanation: The subaqueous part of a delta is located below the water’s surface and is an important part of a delta’s anatomy.
Q17. Which of the following rivers does NOT form a delta?
a. Nile River
b. Amazon River
c. Ok Tedi River
d. Mississippi River
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Correct Answer: c. Ok Tedi River
Explanation: The Ok Tedi River in Papua New Guinea is one of the fastest-flowing rivers in the world and does not form a delta.
Q18. Which of the following is a major factor that determines the shape of a delta?
a. The type of rock in the riverbed
b. The size of the river
c. The balance between sediment deposition and erosion
d. The distance from the river’s source
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Correct Answer: c. The balance between sediment deposition and erosion
Explanation: The shape of a delta is determined by the balance between sediment deposition and erosion, which is influenced by factors such as river flow velocity, sediment load, and wave and tidal action.
Q19. Which of the following is a consequence of delta subsidence?
a. Increased flooding
b. Loss of wetlands
c. Saltwater intrusion
d. All of the above
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Correct Answer: d. All of the above
Explanation: Delta subsidence, or the sinking of a delta, can lead to increased flooding, loss of wetlands, and saltwater intrusion, which can have negative impacts on the environment and human populations living in delta regions.
Q20. Which of the following is a human activity that can contribute to delta subsidence?
a. Deforestation
b. Groundwater extraction
c. Construction of dams
d. All of the above
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Correct Answer: d. All of the above
Explanation: Human activities such as deforestation, groundwater extraction, and construction of dams can contribute to delta subsidence by altering the natural processes that maintain the balance between sediment deposition and erosion.