How could we save water ?
Tap water runs when I wash my teeth  …
What volume of water did I waste?
We must measure the flow! HOW ?
We need : <ul><li>A tap (of course!) </li></ul><ul><li>A test tube (to measure  volumes) </li></ul><ul><li>A chronometer (...
Measure of volume
Measure of duration
Our results <ul><li>Volume : 130 mL = 0,13 L </li></ul><ul><li>Duration : 1 s </li></ul>
Our interpretation <ul><li>If 0,13 L run during one second… </li></ul><ul><li>During one minut 0,13 x 60 = 7,8 L run… </li...
Our conclusion <ul><li>23,4 liters! It’s wasteful! </li></ul>
Advice to save water <ul><li>Switch off the tap when you wash your teeth! </li></ul><ul><li>Goodbye Poland and Turkey! </l...
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Save water

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Author : Stéphane Le Han

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Save water

  1. 1. How could we save water ?
  2. 2. Tap water runs when I wash my teeth …
  3. 3. What volume of water did I waste?
  4. 4. We must measure the flow! HOW ?
  5. 5. We need : <ul><li>A tap (of course!) </li></ul><ul><li>A test tube (to measure volumes) </li></ul><ul><li>A chronometer (to measure durations) </li></ul>
  6. 6. Measure of volume
  7. 7. Measure of duration
  8. 8. Our results <ul><li>Volume : 130 mL = 0,13 L </li></ul><ul><li>Duration : 1 s </li></ul>
  9. 9. Our interpretation <ul><li>If 0,13 L run during one second… </li></ul><ul><li>During one minut 0,13 x 60 = 7,8 L run… </li></ul><ul><li>And during 3 minuts 7,8 x 3 = 23,4 L run! </li></ul>
  10. 10. Our conclusion <ul><li>23,4 liters! It’s wasteful! </li></ul>
  11. 11. Advice to save water <ul><li>Switch off the tap when you wash your teeth! </li></ul><ul><li>Goodbye Poland and Turkey! </li></ul>

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