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Important questions on Mineral Riches In The Soil

In which area diurnal temperature in soil surface vary

A

Sea

B

Lake

C

Tundra

D

Desert

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Which of the following forms due to clumping of soil?

A

Hills

B

Peds

C

Aggregates

D

None of the above

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Define paedogenesis.

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Paedogenesis is the process of formation of soil from upper rocky crust of the Earth

Soil formation takes place due to 

A

Weathering

B

Differentiation

C

Movement

D

All of the above

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Soil is mainly formed due to the weathering of large rocks. The action of abiotic factors on the rocks leads the gradual conversion into the layer of soil. The process of soil formation is known as pedogenesis. Soil is the mixture of minerals, organic matter, gasses, liquids, and the countless organisms that together support life on the earth. The mineral riches of soil provides fertility to the soil and hence, help the plants to grow well. 

The uppermost layer of the land forms ......................

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Soil is a mixture of clay, rocky particles and organic remains of plants and animals. It forms the upper layer of surface of earth i.e. it covers the land. Soil is formed from the weathering of rocks. Different types of soils are present depending upon the climatic conditions of the place and different composition of gravel, clay etc. in the soil. Topmost layer of soil called humus is most fertile as it contains nutrients for the growth of plants. Soil is a shelter for many microorganisms. Hence, soil is an important natural resource.
So, the correct answer is 'Soil'.

Which is not a part of atmosphere?

A

Light

B

Temperature

C

Edaphic factor

D

Precipitation

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Edaphic factor refers to soil. Important  edaphic factors are soil types, soil composition, soil pH, soil porosity, soil organisms, soil flora, soil temperature, gases etc.

Edaphic factors are related to

A

Soil

B

Animal

C

Man

D

Temperature

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The constituent of environment, which directly or indirectly influence the form and functioning of organisms in any specific way are known as environmental factors. They are of two types- abiotic and biotic. 
The abiotic factors are of four types-
  1. Climatic (light, air, temperature, humidity, precipitation).
  2. Edaphic (soil).
  3. Topographic (surface behaviour of Earth).
  4. Fire.
Edaphology is study of relationship between soil and living organisms i.e., how soil texture, composition, soil properties, soil fauna and flora etc. effect the living organisms.

Which of the following factor influences the evolution of soil?

A

Water

B

Air

C

Sand

D

Both A and B

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What is soil formation called?

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Pedogenesis is defined as the process of soil formation by biogeochemical activities such as weathering. This activity is influenced by climate and organisms present in the soil.

Explain the role of the sun in the formation of soil.

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It heats up the rocks during the day. Heating causes the rocks to expand. During night, the rocks cool and contract. Different parts of a rock expand and contract at different rates resulting in its cracking and breaking up into smaller pieces or fragments.

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