Water: A Wonder Liquid
Chapter Name : Natural Resources |
Sub Topic Code : 103_09_14_03_01 |
Topic Name : Water: A Wonder Liquid |
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Sub Topic Name : Water: A Wonder Liquid |
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Introduction
Water occupies a large surface area on the earth. All life forms require water for its survival.
Pre-Requisites:
• Percentage of saline and fresh water on the earth. • Water bodies having saline and fresh water.
Real Life Question:
Why is water so necessary? Can organisms survive without water?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Presence of water on earth | Water found in seas and oceans is saline. Fresh water is found frozen in ice caps at poles and snow covered mountains. The underground water and water in rivers, lakes and ponds is also fresh. |
| Organisms require water | To carry out all cellular processes and various reactions those take place in the body. Substances are transported from one part to another in dissolved form and hence organisms maintain water levels in body to stay alive. |
| Terrestrial life forms | They require fresh water as their bodies cannot tolerate or get rid of the high amounts of dissolved salts in saline water. |
| Diversity of life | The availability of water decides the diversity of life in a particular area along with other factors such as temperature and nature of soil. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Encyclopedia and internet | Try to find various water harvesting techniques used to save water in various places such as farms, garden, ground water harvesting etc. |
Real life uses :
Life on earth cannot sustain without water.
Places to visit :
Farms, garden, etc.
Practical examples around us
| Examples | Explainations |
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What you learn in Theory:
Presence of saline and fresh water in different water bodies and the importance of water in life for survival.
What you learn in Practice:
How water is important for survival.