The mineral and organic material on the surface of the Earth is :
Soil
Gravel
Rocks
Humus
The dark, organic material that forms in soil when plant and animal matter decays is called :
Sand
Silt
Why is soil important?
Because it provides home for animals.
Because we need soil to live.
Because of its ability to let plants grow in it.
Because animals need soil to grow.
How is soil formed?
By breaking down of mountains.
By breaking down of hills.
By breaking down of stones.
By breaking down of rocks.
Soil gets polluted by :
Dumping garbage in water bodies.
Smoke from vehicles and factories.
Chemicals getting thrown into the soil.
Burning garbage outdoors.
The processing of wearing away of rocks is called :
Weathering
Watering
Breaking
Squeezing
Which is the effect of land pollution?
Various kinds of cancers
Asthma
Diarrhoea
Hypertension
Clayey soil can :
Most plants grow in it.
Lot of air in it.
Cannot hold water well.
Hold lot of water.
The bigger particles of soil are called :
Soil is classified into :
Four
Five
Three
Two
