Water: A Wonder Liquid
Water: A Wonder Liquid: Overview
This topic details the characteristics and uses of water and its importance to living beings. We will learn about ground and surface water and their sources. It also explains the causes and effects of water pollution.
Important Questions on Water: A Wonder Liquid
Name two sources of freshwater.
Name the most important source of ground and surface water. (Rainfall/ Ocean/ Man-made reservoir)
How much percent of our body is made by water?
One of the following factors does not lead to soil formation in nature.
Among the given options, which one is not correct for the use of large amount of fertilisers and pesticides?
The term “water pollution” can be defined in several ways. Which of the following statements does not give the correct definition?
What happens when rain falls on soil without vegetation cover?
Soil erosion can be prevented by
Total earth’s surface covered by water is
Major source of mineral in the soil is the
The most fertile layer of soil is called
Which does not help in maintaining soil fertility?
Identify the non-biodegradable substance.
The fertility of soil is lost due to
Which one can lead to ‘bio-magnification’?
Which one is not a water-borne disease?
Why does water need conservation even though large oceans surround the land masses?
Marked temperature changes in aquatic environment can affect
Rainfall patterns depend on
