Answer to the first one is the total volume of water on Earth is estimated at 1.386 billion km³ (333 million cubic miles), with 97.5% being salt water and 2.5% being fresh water. Of the fresh water, only 0.3% is in liquid form on the surface.
2: Over 68 percent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers, and swamps.
3: Condensation is the change from a vapor to a condensed state (solid or liquid). Evaporation is the change of a liquid to a gas. The Microscopic View of Condensation.
4: The water cycle shows the continuous movement of water within the Earth and atmosphere. ... Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow. Water in different phases moves through the atmosphere (transportation).
5: Transpiration is the process by which plants give off water vapor through openings in their leaves.
6: Streams are shallower than rivers. Streams are more turbulent and aggressive than rivers. Streams erode stones, sculpt the surface of the earth and carry the sediment into rivers that carry all the sediment into oceans and lakes. Streams flow within narrow banks while rivers flow within wider banks.
7: A lake is usually larger than a pond. A pond is shallow enough for the sun rays to reach the bottom. A lake has an area which is deep enough that the sun rays can't reach the bottom.
8: Wetlands serve many functions and values that often go unnoticed. They are particularly valuable components of the ecosystem. Much of this stems from their habitat for fish and wildlife, as well as for protecting water quality, erosion prevention, flood storage and recreation.
9: The water that occurs below the surface of Earth, where it occupies all or part of the void spaces in soils or geologic strata. It is also called subsurface water to distinguish it from surface water, which is found in large bodies like the oceans or lakes or which flows overland in streams.
10: The water table is an underground boundary between the soil surface and the area where groundwater saturates spaces between sediments and cracks in rock. ... Underneath the water table is the saturated zone, where water fills all spaces between sediments.
11: Aquifers are underground layers of rock that are saturated with water that can be brought to the surface through natural springs or by pumping. ... Groundwater moves more readily through these materials, which allows for faster pumping and other methods of extracting the water.
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