Water levels in rivers increase greatly during ______.

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Water levels in rivers increase greatly during raining.

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Chapter 2: Water - Evaluation [Page 28]

Chapter 2 Water
Evaluation | Q II. 4. | Page 28

Cleaning of water is a process of removing ______.

Two gases found dissolved in natural water are

Explain how the peculiar variation of density of water with temperature can protect marine-life.

Answer the following question:

Why is acid added to water before electrolysis ?

Explain why:

Water is an excellent liquid to use in cooling systems.

What is the composition of water? In what volume its elements combine?

What are stalgmites and stalactites? How are they formed?

Of the total water available on the earth, fresh water forms ______ percent.

How is the life of organisms living in water affected when water gets polluted?

What is the source of water in the following?

Wells