Soil gets polluted by :
Dumping garbage in water bodies.
Smoke from vehicles and factories.
Chemicals getting thrown into the soil.
Burning garbage outdoors.
The bigger particles of soil are called :
Silt
Sand
Humus
Gravel
Which is the smaller particle of soil?
Which is the effect of land pollution?
Various kinds of cancers
Asthma
Diarrhoea
Hypertension
Very tiny living things that cannot be seen by naked eye are :
Earthworms
Microbes
Bugs
Centipedes
How is soil formed?
By breaking down of mountains.
By breaking down of hills.
By breaking down of stones.
By breaking down of rocks.
Clayey soil can :
Most plants grow in it.
Lot of air in it.
Cannot hold water well.
Hold lot of water.
Which is the most useful nutrient found in humus?
Carbon
Oxygen
Hydrogen
Nitrogen
The processing of wearing away of rocks is called :
Weathering
Watering
Breaking
Squeezing
Which gives soil different colors?
Rocks
