Underground water and the water on the earth's surface is known as__:

Q. Underground water and the water on the earth's surface is known as__:
Answer: hydrosphere
Notes: The hydrosphere is the combined mass of water found on, under, and above the surface of a planet. It has been estimated that there are 1,386 million cubic kilometres of water on Earth. This includes water in liquid and frozen forms in groundwater, oceans, lakes and streams.

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