water
THE HYDROLOGIC CYCLE
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How can we define the water cycle?
• A natural process in which water is cycled between the
earth’s surface and the atmosphere using the sun’s energy
to change state.
What is the importance of the water cycle?
• Replaces water used by people or lost in rivers to the sea.
• Regulates the earth’s temperature by absorbing heat from
the equator and circulating it around earth.
• It is a self-purifying system.
DRINKING
INDUSTRIAL
DOMESTIC
USES OF WATER
POWER
GENERATION
AGRICULTURAL
WATER PURIFICATION
• POTABLE WATER- water which is free from
disease-causing microorganisms and has no
undesirable tastes, colours, odours or harmful
chemicals.
There are different methods of water
purification, each effective against a specific
form of contamination, thus more than one
method must be used.
• Activity-students to create a flow diagram for
the treatment of water. (arrange the different
methods).