Chapter – Class 4 Science Chapter soil
Class 4 Soil & Its Types Q & A Worksheet | class 4-soil questions and answers for class 4
Fill in the blanks
- The process of soil formation is called ………………
- The layer below the topsoil in soil profile is called
- ………………..soil become lumpy and sticky when mixed with water
- ………………best for growing plants
Answer the following questions
What is soil?
The top layer of earth surface is called soil it consists of sand remains of dead plants and animals minerals water and air.
What is the composition of soil?
Soil is made up of different types soil particles
Sand :- largest soil particles
Silt :- smaller than sand but bigger than clay
Clay :-Very tiny soil particles
Soil also contains small stones minerals and humans as well as air and water
Define Types of soil ?
There are mainly three types of soils present in our environment
It has more sand particles then clay it is rough and non sticky
In this type of soil the proportion of sand clay and silt are same it is the best soil for growing plants also rich in nutrients and humus
Clay soil :-
this soil contain maximum clay particles the soil is smooth when dry and sticky when wet.
Define soil profile?
Soil profile consists of three layers
Top soil :- very fertile soil
Subsoil :- contains stones and rocks
Bedrock :- contains large pieces of rocks
What is soil erosion?
The removal of the upper layer of soil by wind and water is called soil erosion.
What are the causes of soil erosion?
The main cause of soil erosion are strong wind, cutting down trees, heavy rainfall and flood.
How soil can be conserved?
Soil can be conserved by planting more trees, building dams grazing and terrace farming.
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