What is It
Learning Circuit!
Water comes from different sources. It may come from open or closed
sources. It may also come from a small body of water or a big body of water.
Rainwater comes from clouds. Most of water on Earth is salty water. Only about 3
percent of Earth’s water is freshwater. How often do you use water? In what
activities do you use water?
There are three main sources of water. The kind of water depends on its
sources. The three different kinds of water are sea water, freshwater, and
groundwater.
1. Seawater is salty. It contains plenty of salt. It is found in the seas and oceans.
Seawater is called hard water.
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2. Freshwater is also called surface water.
 does not contain salt
 found on open but small bodies of water like rivers, lakes, creeks,
and ponds
 comes mostly from rain

Rainwater flows from land into streams and rivers. In cold countries, it also
comes from snow which melts and runs into the surface water during spring.
3. Groundwater is found below the surface of the earth. It comes from water that
move deep into the ground. It is stored in the underground layer called water
table.
 Groundwater is the safe source of water. It is considered the
cleanest water and contains plenty of dissolved minerals which the
human body needs.
 Springs are openings of the groundwater directly to the earth’s
surface.
Other sources of water are:
 clouds - come evaporating water
 icebergs, and glaciers - solid water found only in very cold
countries and contain about two-thirds of the earth’s freshwater.
Guide Questions:
1. What are the sources of water?
2. Why is saltwater called hard water?
3. What makes groundwater a safe source of drinking water?