Weathering, mass wasting, erosion and transportation are indicators of which one of the following processes?
- A.Denudation
- B.Endogenetic process
- C.Diastrophism
- D.Mountain building
Correct answer
Explanation
The correct answer is A, Denudation. Weathering, mass wasting, erosion and transportation together wear down and strip away the earth's surface, and this combined work is called denudation.
Geomorphic processes are of two kinds. Exogenic processes draw their energy from the sun and gravity and act on the surface: weathering breaks rocks where they lie, mass wasting moves loose material downslope under gravity, as in landslides and soil creep, and erosion and transportation by running water, wind, glaciers and waves carry the debris away. Their total effect is to lower the land, which is denudation. Endogenic processes draw energy from inside the earth and build up the surface through diastrophism and volcanism.
B is wrong because endogenetic processes come from the earth's interior and raise the land. C is wrong because diastrophism means the folding, faulting and uplift of the crust by internal forces. D is wrong because mountain building (orogeny) is a form of diastrophism, not of wearing down.
Exam tip: Exogenic = denudation (weathering, mass wasting, erosion); endogenic = diastrophism and volcanism.
Practice Questions
View allThe activities or services focussed on creation, rearrangement and interpretation of new and existing ideas are referred to as
- A.quaternary activities
- B.quinary activities
- C.tertiary activities
- D.secondary activities
Show answer
Services that create, rearrange and interpret new and existing ideas, interpret data and evaluate new technologies are classed as quinary activities.
Read the full explanation →Consider the following statements :
1. Rocks do not remain in their original form for long and undergo transformation.
2. Transformation of rocks is caused by weathering, erosion and metamorphic action.
Which of the statements given above is/are correct?
- A.1 only
- B.2 only
- C.Both 1 and 2
- D.Neither 1 nor 2
Show answer
Rocks are constantly changed from one form to another, and the agents of that change are weathering, erosion and metamorphism, which together make up the rock cycle.
Read the full explanation →Which one of the following is not a mountain peak of the Andaman and Nicobar Islands?
- A.Saddle Peak
- B.Mount Thuillier
- C.Lhotse Peak
- D.Mount Diavolo
Show answer
Lhotse is not in the Andaman and Nicobar Islands at all; it is a Himalayan peak on the border of Nepal and Tibet, just south of Mount Everest, and at about 8,516 metres it is the fourth-highest mountain in the world.
Read the full explanation →Which one of the following Indian States has the longest coastline?
- A.Tamil Nadu
- B.Gujarat
- C.Maharashtra
- D.Andhra Pradesh
Show answer
Gujarat has the longest coastline of any Indian state. Its coast runs from the Rann of Kachchh in the north, around the Gulf of Kachchh and the Saurashtra (Kathiawar) peninsula, into the Gulf of Khambhat and down to the border with Maharashtra near Daman.
Read the full explanation →Which of the following statements regarding soil is/are correct?
1. Alluvial soils are rich in nitrogen content.
2. Black soils are rich in iron and lime but deficient in nitrogen.
3. Laterite soils are rich in iron and aluminium but deficient in nitrogen and potassium.
Select the correct answer using the code given below.
- A.1 and 2 only
- B.3 only
- C.2 and 3 only
- D.1, 2 and 3
Show answer
Statement 1 is wrong: alluvial soils, the most widespread soils of India, are generally rich in potash and lime but poor in nitrogen and phosphorus, which is why farmers on the northern plains add nitrogen fertiliser.
Read the full explanation →