TEST+ABOUT+WATER


 * COMENIUS PROJECT – 4TH ESO 2010 **
 * ANSWER THE QUESTIONS ABOUT THE ‘WATER ANALYSIS TASK’ **
 * 1) WHAT PUPILS DID THE COMENIUS TASK?
 * 2) WHAT TEACHERS WERE COORDINATING THE TASK?
 * 3) WHAT TYPE OF WATER WAS ANNALYSED?
 * 4) HOW WAS THE TEMPERATURE OF THE WATER MEASURED?
 * 5) WHAT WAS THE TEMPERATURE?
 * 6) WHAT ABOUT THE METHOD FOR PH?
 * 7) THE HARDNESS OF THE WATER WAS….
 * 8) CONCERNING THE TRANSPARENCY, THE WATER WAS:
 * 9) WHAT DID THEY ADD TO THE CHLORIDE IONS?
 * 10) WHAT IS THE NAME OF THE CONTAINER USED TO PUT THE WATER IN?

Then,the teachers designed one multiple choice test for the virtual platform based on a more advanced level of content:

**THE TAP WATER ANALYSIS TEST **

__MULTIPLE CHOICE TEST __

**Answer the questions about the tap water analysis ** **//(only a choice is correct) //**


 * 1. If the tap water has got a pH of 7.5, it means that ….. **

□  It is a bit acid □ Tap water is always neutral because it is water □  It is slightly basic □  It is a strongly basic


 * 2. We measure pH with the pH meter and the indicator paper ….. **

□  Both methods are equally precise <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The pH paper must be calibrated in order to work properly <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The pH meter must be calibrated in order to work <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The pH meter needs drying among measurements **<span style="font-family: 'Arial','sans-serif';">3. When the tap water has a lot of bicarbonates …. ** <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> It is pH is acid <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> It is always 7 <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> It is transparent <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> It is slightly basic
 * <span style="font-family: 'Arial','sans-serif';">4. For a correct measurement of tap water temperature…. **

<span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> It is better to use a clinic thermometer because it is very precise <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The measured temperature of the tap water depends on the external temperature <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> We must leave the thermometer inside the water for 15 minutes for a precise measurement <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The thermometer precision depends on the minimum temperature that it can measure


 * <span style="font-family: 'Arial','sans-serif';">5. With reference to the temperature of the tap water … **

<span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The measured temperature does not depend on the quantity of water which has been taken <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The temperature must be measured as soon as you open the tap <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The temperature depends on the level of chlorides <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> pH 7 has got higher temperature than pH 6
 * <span style="font-family: 'Arial','sans-serif';">6. With reference to hardness of tap water … **

<span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The tap water boils at 100º no matter its hardness <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> It depends on the country's soil where it has been measured <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> Hardness has nothing to do with the washing powder consume <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The lower the hardness, the higher the electrical conductivity of the tap water


 * <span style="font-family: 'Arial','sans-serif';">7. With reference to the transparency measurement of the tap water with laser light … **

<span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> Tap water has got similar transparency to the distilled water <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> We use laser light because it spreads better in water compared with the ordinary light <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The water hardness modifies its transparency <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The chloride sparkles of the running tap water can't modify its transparency


 * <span style="font-family: 'Arial','sans-serif';">8. To determine the chlorides of the tap water through silver nitrate and sodium chromate … **

<span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> Silver nitrate is used to form silver chloride which is soluble <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> Silver chromate has got a white colour <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The dissolution of silver nitrate volume is measured with pipette <span style="font-family: 'Arial','sans-serif'; font-size: 24px;">□ <span style="font-family: 'Arial','sans-serif';"> The change of colour is produced when we consume the chloride ions and when the silver chromate is formed

//<span style="font-family: 'Arial','sans-serif'; font-size: 13px;">Designed by Manuel Veamonte and Begoña Pardo. //<span style="font-family: 'Arial','sans-serif'; font-size: 13px;">I.E.S. “Pedro Cerrada”. Utebo (Zaragoza). SPAIN

<span style="font-family: 'Arial','sans-serif'; font-size: 13px;">Commenius Project : “Rich interactive Scientific Learning for Everyone”