The diagram (1) ............................ A method for filtering dirty water using a barrel and a drum, a pipe and two taps,
(2) ..........................., the drum and barrel are placed (3) ........................... to each other so that the top of the barrel is higher than the drum. (4) ........................... items are linked by a pipe that runs from the bottom of the barrel into the side of the drum. (5) ..........................., the flitter is made by adding sand, charcoal and gravel to the barrel.(6) ..........................., a tap is fix to the bottom of the drum and the top of the pipe.
The process (7) ........................... when dirty water is poured into the barrel. (8) ..........................., the water goes through the filter and up the pipe into the drum, where it is stored. (9) ..........................., when the tap in the drum is turned on, clean drinking water comes out
(10)..........................., the system shows how natural materials and basic equipment can be use to produce drinking water in just a few simple stages.
In conclusion after that shows next finally
First begins then Next These
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