Class-7,Soil

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Class-7,Soil

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Q1) The uppermost fertile layer of earth crest is called *

1 point

Humus

Element

Metal

Soil

Q2) Humus and the smallest particles of rock form the *

1 point

A-horizon

B-horizon

bedrock

C-horizon

Q3) Which layer is formed of decayed organic matter? *

1 point

Humus

Clay

Minerals

Air

Q4) Which of these do not cause weathering? *

1 point

clouds

freezing of rainwater

flowing water

wind

Q5) Breaking down of big pieces of rock into smaller pieces is called *

1 point

Weathering

Soiling

Mounding

Curving

Q6) Water percolating into the soil collects over. *

1 point

C-horizon

B-horizon

None of these

A-horizon

Q7) Which one is not a natural force that causes weathering of rock? *

1 point

Glacier.

Earthquake

Wind

Water

Q8) Clayey particles are of size *

1 point

Less than 0.4 mm

More than o.4 mm

Less than 0.2 mm

More than 0.2 mm

Q9) ‘Khadar’ is another name of *

1 point

Black soil

Red soil

Desert soil

Alluvial soil

Q10) Waterlogging can be expected in soil which is rich in *

1 point

silt

sand

clay

humus

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