What do we call the dead and decaying plants and animals?
Humus
Matter
Plastic
Organics
Which one of the following has particles smaller than gravel?
Sand
Rocks
Stones
clay
Which one of the following is a mixture of loose pieces of rock and particles of sand and clay?
Rock
Gravel
Loam
stone
Which one of the following is darker in color due to the presence of dead and decaying plants and animals?
Topsoil
Sub soil
Core
sand
Which is the layer just below the topsoi?
End soil
Main soil
core
Which one of the following can hold very little air?
Clay
Which one of the following is mainly a mixture of sand and clay?
Concrete
Which of the following is used to build roads?
Sand and gravel are mixed with cement to make:
Tar
cement
On the basis of size of particles and amount of humus present in them, into how many kinds are the soil classified?
1
2
3
4
