Ch 14 covers the importance of water, the water cycle, sources of water, and water conservation. Students learn about evaporation, condensation, precipitation, and why saving water is essential.
Sun's heat evaporates water from oceans, rivers, and lakes. Water vapour rises, cools, and condenses into tiny droplets forming clouds. Clouds release water as rain (precipitation). Rainwater flows into rivers and oceans, and the cycle repeats.
Only about 3% of earth's water is fresh, and most of it is in glaciers. Droughts and floods affect water availability. Conservation methods: fix leaking taps, rainwater harvesting, drip irrigation, avoid wastage. Every drop counts!
Download: https://ncert.nic.in/textbook/pdf/fesc114.pdf | Complete book: https://ncert.nic.in/textbook/pdf/fesc1ps.zip
Rainwater harvesting is collecting and storing rainwater that falls on rooftops and other surfaces. The water is directed through pipes into a storage tank or allowed to seep into the ground to recharge groundwater. It helps increase water availability, especially in areas with low rainfall.
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