Nature’s Treasures

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Oxygen is the most important gas in air for our survival. Our body needs oxygen to perform its functions. We can survive without food or water for a few days, but we cannot survive without oxygen for …

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Air is a mixture of gases containing: Nitrogen (78%), Oxygen (21%), and Argon, Carbon dioxide and other gases (1%). Air contains these gases in different proportions, with nitrogen being the most abun…

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Wind is moving air. We can use wind energy through windmills, which rotate when wind blows on their wings. Windmills can run flour mills, pull up water from wells, or generate electricity. India has m…

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Water is precious because only a small fraction of freshwater is easily accessible for our use. Water covers about two-thirds of Earth's surface, but most is saline (salty) water in oceans and seas, w…

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Three ways to conserve water: 1) Turn off taps when not in use, 2) Fix water leakages promptly, 3) Practice rainwater harvesting. Other methods include recycling water and using water efficiently whil…

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Rainwater harvesting is collecting and storing rainwater for later use. Traditional methods in India include stepwells like Bawadi in Rajasthan and Vav in Gujarat. These structures store rainwater and…

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The Sun is the main source of energy because: 1) It helps plants prepare food through photosynthesis, 2) It provides heat and light to all living beings, 3) All energy cycles on Earth depend on the Su…

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Four uses of solar energy: 1) Solar panels generate electricity, 2) Solar cookers for cooking food, 3) Solar water heaters for heating water, 4) Drying clothes, food items like chillies and mangoes. S…