Question : The rapidly growing mass of phytoplankton covering the surface water of a lake or pond is known as:
Option 1: eutrophication
Option 2: water bloom
Option 3: water pollution
Option 4: water hyacinth
Correct Answer: eutrophication
Solution : The correct answer is eutrophication .
When nutrient levels in any water body increase, especially that of phosphate and nitrate, which leads to increases in the biomass of the water body, this process is known as eutrophication. Its initial stage is characterised by the rapid growth of phytoplankton in the upper layer of the water body. It is caused because of agricultural runoff, and industrial waste, which increase nutrient levels. It is harmful and leads to the death of the aquatic ecosystem.
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Question : In places, the groundwater is stored between layers of hard rock below the water table. This is known as a/an ______.
Question : Which of the following is a major component of water pollution in the Bengal Basin?
Question : ________ are not considered surface water.
Question : In a mixture of 25 litres, the ratio of acid to water is 4 : 1. Another 3 litres of water is added. The ratio of acid to water in the new mixture is:
Question : Lake formed in a cut-off river, meander is called:
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