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Soil

Description: Soil
Number of Questions: 16
Created by:
Tags: Science Linear Equations with Variables on Both Sides Reducing Complex Linear Equations to Simpler Forms Solving Linear Equations of the Form ax + b = c Soil Soil Profile, Soil Types, Properties of Soil
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Which of the following factors is/are responsible for weathering?

  1. Temperature changes

  2. Wind

  3. Water

  4. All of the above

  5. Frost

Show answer
Correct Option: D
Explanation:

This is the correct option. All the given factors are responsible for the process of weathering. Trapped rainwater freezes in winters, which causes the crevices in the rocks to further open up due to the lateral pressure produced by expanding ice.

Which of the following statements is/are false?

a. Weathering is a very fast and abrupt process during which the parent rock material breaks down into fine particles. b. Soil is a life support medium, providing sustenance to plants and animals. c. Rocks expand on heating and contract on cooling.

  1. Only b

  2. Both a and c

  3. Only a

  4. Both b and c

  5. Only c

Show answer
Correct Option: C
Explanation:

Only statement a is false.

Plants grow in the _____________. This layer of Earth's crust supports the growth of plants in many ways.

  1. topsoil

  2. regolith

  3. subsoil

  4. bedrock

  5. eluviation layer

Show answer
Correct Option: A
Explanation:

This is the correct option. Plants grow in the topsoil. This layer of Earth's crust supports the growth of plants in many ways.

Which of the following is not a property of B-horizon?

  1. Harder and compact.

  2. Layer rich in soluble minerals and iron oxides.

  3. Light in colour.

  4. Rich in humus.

  5. Roots of tall plants generally reach this level.

Show answer
Correct Option: D
Explanation:

This is the correct option, as this is not a property of B-horizon. This layer is not rich in humus.

Which of the following is/are the factor(s) influencing the nature of soil?

  1. Parent material

  2. Climate

  3. Time

  4. All of the above

  5. Living organisms

Show answer
Correct Option: D
Explanation:

This is the correct option. All of the above factors influence the nature of soil. Plants affect soil development by supplying upper layers with organic matter, recycling nutrients from lower to upper layers, and helping to prevent erosion. Deep rooted plants contribute more to soil development than shallow rooted plants. Animals living in the soil also affect decomposition of waste materials.

Which of the following is not a property of the A-horizon?

  1. Dark in colour.

  2. Remains of plants and animals are not found in this layer.

  3. Very fertile.

  4. Soft, porous and holds enough water.

  5. Living organisms are present.

Show answer
Correct Option: B
Explanation:

This is the correct option, as this is not a property of the A-horizon.

Which of the following soils is used to make matkas and surahis?

  1. Black soil

  2. Forests and hill soil

  3. Alluvial soil

  4. Desert soil

  5. Red soil

Show answer
Correct Option: A
Explanation:

This is the correct option. Black soil is used to make matkas and surahis. These are mostly clay soils.

Match the following:

 
a. Sand 1. Below 0.05 mm
b. Gravel or stones 2. Above 2.0 mm
c. Silt and clay 3. 0.05 to 2.0 mm

  1. a - 3, b - 2, c - 1

  2. a - 3, b - 1, c - 2

  3. a - 2, b - 3, c - 1

  4. a - 2, b - 1, c - 3

  5. a - 1, b - 2, c - 3

Show answer
Correct Option: A
Explanation:

This is the correct option. The diameter of sand particles is 0.05 to 2.0 mm. The diameter of gravel or stones is above 2.0 mm. The diameter of silt and clay is below 0.05 mm.

Which of the following statements is/are false?

a. Soil having particles of only one particular size is not fertile. b. Sandy soil is highly porous and does not hold much water. c. Xerophytic plants that grow in loamy soils serve as wind breakers and also help in binding the soil.

  1. Only c

  2. Both a and b

  3. Only a

  4. Both b and c

  5. Only b

Show answer
Correct Option: A
Explanation:

Only statement c is false. Xerophytic plants like cacti that grow in sandy soil serve as wind breakers and also help in binding the soil. Only statement c is false. Sandy soil is highly porous and does not hold much water.

Which of the following factors is/are responsible for soil erosion?

  1. Deforestation

  2. Overgrazing

  3. Poor farming methods

  4. Forest fires

  5. All of the above

Show answer
Correct Option: E
Explanation:

 All are the factors responsible for soil erosion.

Match the following:

a. Weathering 1. Vertical section of the soil to show different layers of soil
b. Soil profile 2. Relative proportion of different sized particles in the soil
c. Soil texture 3. Process of soil formation that involves disintegration of large pieces of rocky material into fine particles

  1. a - 3, b - 2, c - 1

  2. a - 3, b - 1, c - 2

  3. a - 2, b - 1, c - 3

  4. a - 1, b - 2, c - 3

  5. a - 2, b - 3, c - 1

Show answer
Correct Option: B
Explanation:

This is the correct option.  Soil profile is vertical section of the soil to show different layers of soil. Weathering is the process of soil formation that involves disintegration of large pieces of rocky material into fine particles. Soil texture is the relative proportion of different sized particles in the soil.

Match the following ||| |---|---| |1. Loamy soil|a. Soil having high percentage (70-80%) of bigger particles like sand particles| |2. Clayey soil|b. Soil having mixture of big and fine particles| |3. Sandy soil|c. Soil having high percentage of fine particles like clay particles and very less sand|

  1. 1 - b, 2 - c, 3 - a

  2. 1 - b, 2 - a, 3 - c

  3. 1 - a, 2 - c, 3 - b

  4. 1 - a, 2 - b, 3 - c

  5. 1 - c, 2 - b, 3 - a

Show answer
Correct Option: A
Explanation:

This is the correct option.1. Loamy soil b. Soil having mixture of big and fine particles

  1. Clayey soil c. Soil having high percentage of fine particles like clay particles and very less sand
  2. Sandy soil a. Soil having high percentage (70-80%) of bigger particles like sand particles

Which of the following statements is/are false? a. The greater the humus in the soil, the the more fertile is the soil. b. Clayey soils are heavy soils and is thus not able to support plant growth. c. Loamy soils contain enough air due to the presence of some large particles.

  1. Only a

  2. a and b

  3. Only b

  4. a and c

  5. Only c

Show answer
Correct Option: C
Explanation:

Clayey soils are heavy soils and is thus not able to support plant growth, is a false statement. Thus, this is the correct option.

Which of the following statement is/are false? a. Dark coloured soils are rich in organic matter than the light coloured soils. b. The difference in soil colour does not depends on the geographical location of the soil. c. Microorganisms cause the decomposition of dead plants and animals and release the minerals back to the soil.

  1. Only a

  2. a and b

  3. Only b

  4. a and c

  5. Only c

Show answer
Correct Option: C
Explanation:

The difference in soil colour does not depend on the geographical location of the soil, is a false statement. Hence, it is the correct option.

Which of the following statements is/are false?

a. Rock or soil particles of different sizes are an important component of soil. b. Soil consists of only inorganic matter. c. Water containing inorganic salts is an important component of soil.

  1. Only a

  2. Both a and c

  3. Only b

  4. Both b and c

  5. Only c

Show answer
Correct Option: C
Explanation:

Only statement b is false. Soil is a mix of varying amounts of inorganic matter, organic matter, water, and air.

Which of the following organisms is/are found in the soil?

  1. Earthworm

  2. Bacteria

  3. Fungi

  4. Roundworm

  5. All of the above

Show answer
Correct Option: E
Explanation:

This is the correct option. All of these organisms are found in the soil.

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