Water constitutes two-thirds of the Earth. Oceans, seas, rivers, etc., constitute the hydrosphere. Oceans are the largest storehouses of water.
Notes on Hydrosphere
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Notes on Atmosphere
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The air surrounding the Earth is called the atmosphere. Air is an invisible mixture of gases that surrounds the Earth.
Notes on Lithosphere
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The term ‘lithosphere’ means crust of the Earth. It includes all big and small landmasses which are found on the Earth.
Why Life is Possible on the Earth?
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Life is possible on the Earth because of the following reasons:
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