About how many percent is the salted water in the oceans?
a) 32%
b) 57%
c) 93%
d) 97%
Fresh water available to mankind is about………..
a) 1%
b) 3%
c) 7%
d) 11%
The transfer of water from water bodies to atmosphere and return back is called:
NTS PST 15/12/2019 (11:30)
a) evaporation
b) condensation
c) water cycle
d) transpiration
Soil:
What are the main types of soil?
a) silt, sand and rock
b) clay, humus and sand
c) sand, silt and clay
d) silt, humus and clay
Which of the following is/are the component/s of soil?
a) Nutrients
b) Decomposers
c) Water
d) all of these
What is the role of living organisms in the soil?
a) making soil soft and airy
b) making soil hard
c) making the air dry
d) make soil unfit for cultivation
