Revision of the earth

04.27.2020
08:31:51
Dear students, good morning everyone
Today's revision topic in the earth: soil
Pg.no : 106 & 107
The important points are
1.Soil:
It's made up of pieces of rocks, minerals,fungi ,humus , bacteria,small animals
2 Humus : organic matter
It is the remains of dead plants and animals
3.The proportion of clay and sand particles in a soil affects its properties.
For better understanding of concepts watch the below videos