Chapter-5 Lithosphere II Exogenetic Processes — Online MCQ Test
SOCIAL · Samacheer Kalvi 9th · Tamil Nadu State Board
Practice Chapter-5 Lithosphere II Exogenetic Processes with a free chapter-wise online MCQ test.
This chapter covers: Description Explains weathering erosion soil formation and landform development by external forces Keywords Weathering Grand Canyon Delta Mushroom Rocks Moraines.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-5 Lithosphere II Exogenetic Processes — Important Questions & Answers
What is weathering?
- A. The breaking down of rocks at their place of origin
- B. The movement of rocks from one place to another
- C. The formation of magma deep inside the Earth
- D. The rising of ocean tides
Answer: A. The breaking down of rocks at their place of origin
Weathering is the disintegration and decomposition of rocks in the same place without transportation.
Weathering is the disintegration and decomposition of rocks in the same place without transportation.
Which of the following is an example of a wind-formed landform?
- A. Delta
- B. Mushroom rock
- C. Moraines
- D. Oxbow lake
Answer: B. Mushroom rock
Mushroom rocks are formed by wind erosion in desert regions, where the lower part is worn away faster.
Mushroom rocks are formed by wind erosion in desert regions, where the lower part is worn away faster.
Which process mainly involves the wearing away and removal of earth materials by agents like water, wind, and ice?
- A. Deposition
- B. Erosion
- C. Lithification
- D. Condensation
Answer: B. Erosion
Erosion is the process by which materials are detached and transported by natural agents.
Erosion is the process by which materials are detached and transported by natural agents.
Which sequence is correct in the development of a delta?
- A. Deposition of sediments → river reaches sea/lake → river slows down
- B. River slows down → deposition of sediments → river reaches sea/lake
- C. River reaches sea/lake → river slows down → deposition of sediments
- D. River dries up → deposition of sediments → river speeds up
Answer: C. River reaches sea/lake → river slows down → deposition of sediments
At the mouth of a river, the speed decreases when it enters a lake or sea, leading to deposition and delta formation.
At the mouth of a river, the speed decreases when it enters a lake or sea, leading to deposition and delta formation.
Which of the following is the most accurate reason for soil being considered a natural resource formed slowly?
- A. It is formed instantly by rainfall
- B. It forms only from sand
- C. It develops through weathering, organic matter addition, and long-term processes
- D. It is produced only by human activity
Answer: C. It develops through weathering, organic matter addition, and long-term processes
Soil formation takes a long time because it depends on weathering of rocks and accumulation of organic matter over years.
Soil formation takes a long time because it depends on weathering of rocks and accumulation of organic matter over years.