Page 75 - ICSE Chemistry 6

4 Water

Learning Outcomes Key Concepts
Students will be able to
• Occurrence of Water
• defi ne ‘solute’, ‘solvent’ and ‘solu on’.
• infer that solu on is a homogeneous mixture of solute and solvent. • Sources of Water
• States of Water
• discuss diff erent examples of solu ons.
• Importance of Water
• state reasons for pollu on of water resources and suggest ways to
conserve water. • Water—A Universal
Solvent
• Potable Water
• Purifi cation of Water
• Importance of Water for
Sustenance of Life on
Earth
• Water Pollution
• Floods and Droughts

Warm Up Activity
List various ac vi es for which you use water during a day.

Ac vi es in school that require water Ac vi es at home that require water

Water is an important natural resource required by all living beings. It is essen al for
life for humans, animals and plants alike.

Water is essen al for sustenance of life on the earth. It is the second most basic
requirement we have a er air. Water is found on the earth’s surface, above it as well
as below it.

OCCURRENCE OF WATER

Water covers about 70 per cent of the earth’s surface. It occurs in both free and Fig. 4.1: Water
combined states.

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