3. Daily Use Living Things
Drink Cook
Human Plant
The Important
The Important Animal
Wash of Water
Transportation Particular
Time Use
Fire Sport
4. Water is the common name applied to the liquid
form (state) of the hydrogen and oxygen
compound H2O.
When molecular hydrogen (H2) and oxygen (O2) are
combined and allowed to react together, energy is
released and the molecules of hydrogen and oxygen
can combine to form water.
O
H H = Hydrogen
H O = Oxygen
H++H++ O2- H2 O
(Water)
2H2+ O2 H2 O
5. 3. Water
vapour
condenses to
form clouds
3
4. Rain
water falls 4 2
to form
rivers. 2. Water
vapour is
carried up into
the air.
5
5. Rivers flow
into the sea
1. Water
evaporates 1
6. A. SNOW AND ICE ON
MOUNTAIN TOPS
MELT AND FLOW INTO
RIVERS
A B. RESERVOIRS ARE
MADE TO STORE
WATER FOR OUR USE
C. WATER FROM
RESERVOIRS IS
B CLEANED AT WATER
WORKS AND PUMPED
TO OUR HOUSES
D
D. WASTE WATER
FROM OUR HOUSES IS
CLEANED AT THE
C SEWAGE WORKS AND
PUMPED BACK INTO
THE SEA
7. The human body need the water about 55% to 78% depending
on body size
Water is the most familiar and abundant liquid on earth.
Water occurs in three different state; these are solid, liquid and
gas.
Pure water is tasteless, odorless, colorless liquid and made up
of two hydrogen atoms and one oxygen atom
Water is the only substance that occurs at ordinary
temperatures in all three states of matter.
