Tag: soil erosion (geo)

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Questions Related to soil erosion (geo)

Multiple choice geography external forces - responsible for changes the soil soil erosion (geo) soil erosion, soil conservation and uses of soil

The lower horizon of desert soil has deposits of ___________.

  1. Calcium

  2. Iron

  3. Potash

  4. Phosphorus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Deserts soils are usually light coloured with minimal humus content due to which the plant productivity is low. Also the water retaining capacity is very less. However they are rich in minerals-calcium carbonate (caliche), gypsum, and/or salts.

Multiple choice geography external forces - responsible for changes the soil soil erosion (geo) soil erosion, soil conservation and uses of soil

A fertile soil, suitable for growing common crops is likely to have a pH value of _____________.

  1. three

  2. four

  3. six to seven

  4. nine to ten
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Soil pH is a measure of the acidity and alkalinity in soils. pH levels range from 0 to 14, with 7 being neutral, below 7 acidic and above 7 alkalines. The optimal pH range for most plants is between 5.5 and 7.0; however, many plants have adapted to thrive at pH values outside this range.
Multiple choice geography external forces - responsible for changes the soil soil erosion (geo) soil erosion, soil conservation and uses of soil

Arches, stacks and caves are formed by erosional features of ___________.

  1. Wind

  2. Waves

  3. Water

  4. Glaciers
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Caves, arches, stacks, and stumps are erosional features that are commonly found on a headland. Cracks are widened in the headland through the erosional processes of hydraulic action and abrasion. As the waves continue to grind away at the crack, it begins to open up to form a cave.

Multiple choice geography external forces - responsible for changes the soil soil erosion (geo) soil erosion, soil conservation and uses of soil

In which type of formation does gypsum occur?

  1. Bed or layers

  2. Veins and lodes

  3. Results of evaporation in deserts

  4. Alluvial or placer deposits
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gypsum can form anywhere where the right combination of mineral elements occurs and evaporation happens. It occurs as clumps of crystals or in thick beds. Gypsum beds were formed in shallow sea basins. These geologic areas are called evaporation basins because as the climate changed from tropic to arid the water evaporated concentrating the minerals it held. Gypsum formations can also occur in tidal flats along coastlines, in lagoons, deltas, hot springs, volcanic areas, desert water tables and even on plant roots.

Multiple choice geography external forces - responsible for changes the soil soil erosion (geo) soil erosion, soil conservation and uses of soil

Which of the following statements is incorrect?

  1. Cliffs are formed as a result of the wave erosion of the shores

  2. Beaches are formed by the deposition of material by waves along the shore

  3. Erosive action of the river is maximum in its upper course

  4. Process of deposition of material in the low lands is called gradation
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gradation is the process of leveling the land surface by erosion and deposition, not just the deposition itself. The other statements are correct geographical definitions: cliffs are formed by wave erosion, beaches by wave deposition, and river erosion is most intense in the upper course.

Multiple choice geography external forces - responsible for changes the soil soil erosion (geo) soil erosion, soil conservation and uses of soil

Weathering is the process of ______________________.

  1. Eating away of part of the surface of rocks

  2. Breaking up of rocks under the action of wind, water and changes in temperature

  3. Carrying away of eroded material

  4. Wearing away part of the earth's crust
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Weathering is the breakdown of rocks, soils, and minerals through contact with the Earth's atmosphere, water, and biological organisms. It occurs in situ, meaning it does not involve the transport or carrying away of the material, which distinguishes it from erosion.

Multiple choice geography exogenic processes part-2 the soil soil erosion (geo) soil erosion, soil conservation and uses of soil

Mulching is associated with use of ________________.

  1. material to maintain soil moisture

  2. soil to build barrier.

  3. trenches to collect water.

  4. pilled up rocks to slow down the flow of water.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A mulch is a layer of material applied to the surface of an area of soil. Its used for the following purposes:
1. to conserve moisture.
2. to improve the fertility of the soil.
3. to reduce weed growth.

Multiple choice geography exogenic processes part-2 the soil soil erosion (geo) soil erosion, soil conservation and uses of soil

It is important to make small check dams across the flooded gullies because they-
(i)   hold water for irrigation.
(ii)  hold water and prevent soil erosion.
(iii)  recharge ground water.

(iv)  hold water permanently.
Select the correct options from the above stated reasons-

  1. (i) and (iv)

  2. (ii) and (iii)

  3. (iii) and (iv)

  4. (ii) and (iv)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A check dam is a small, often temporary, dam constructed across a swale, drainage ditch, or waterway to counteract erosion by reducing water flow velocity.