WATER EVERYWHEREWATER EVERYWHERE Experiments with water in 3 Experiments with water in 3

workshops.workshops.

School: OŠ DrskaSchool: OŠ DrskaDate: 19 th March 2010Date: 19 th March 2010

Novo mestoNovo mesto

1. EXPERIMENT: THE 1. EXPERIMENT: THE HARDNESS OF WATERHARDNESS OF WATER

Kratka razlaga: Kratka razlaga: Na čajne žličke damo Na čajne žličke damo

kapljice izbranega kapljice izbranega vzorca.vzorca.

Segrevamo nad Segrevamo nad plamenom svečke (voda plamenom svečke (voda mora v celoti izpareti). mora v celoti izpareti).

Razvrstimo jih glede na Razvrstimo jih glede na količino trdnega količino trdnega preostanka.preostanka.

Izvajalci: 7. razred in Izvajalci: 7. razred in učiteljici D. Kavšek in učiteljici D. Kavšek in M. StarihaM. Stariha

Short explanation:Short explanation: Put some drops of the Put some drops of the

chosen sample on a chosen sample on a teaspoon.teaspoon.

Heat above candle Heat above candle flame (water must flame (water must evaporate completely).evaporate completely).

Sort the spoons Sort the spoons according to the according to the quantity of the solid quantity of the solid remain.remain.

Performers: 7th class Performers: 7th class and teachers D. and teachers D. Kavšek and M. StarihaKavšek and M. Stariha

Heating the tube.

Water limestone remains. Comparing all the water samples after heating.

Water samples before heating.

2. EXPERIMENT: 2. EXPERIMENT: PREPARATION OF PREPARATION OF

AROMATIC VINEGARSAROMATIC VINEGARSKratka razlaga: Kratka razlaga: Kis naredimo iz posameznih Kis naredimo iz posameznih

ali s kombinacijami več ali s kombinacijami več zelišč. zelišč.

Damo jih v kozarec za Damo jih v kozarec za vlaganje in jih polijemo s vlaganje in jih polijemo s kisom.kisom.

Kozarec zapremo in pustimo Kozarec zapremo in pustimo na toplem mestu 10-14 dni. na toplem mestu 10-14 dni.

Vmes ga večkrat pretresemo Vmes ga večkrat pretresemo in ga poskusimo. Če je in ga poskusimo. Če je razvita primerna aroma, kis razvita primerna aroma, kis precedimo, nalijemo v temne precedimo, nalijemo v temne steklenice in dobro zapremo.steklenice in dobro zapremo.

Izvajalec: 7. razred in učiteljica Izvajalec: 7. razred in učiteljica Jožica MuhičJožica Muhič

Short explanation:Short explanation: We make the vinegar from We make the vinegar from

individual or combinations of individual or combinations of various herbs.various herbs.

We put the herbs in a jar and We put the herbs in a jar and pour vinegar over them.pour vinegar over them.

We seal the jar and keep them We seal the jar and keep them in a warm place for 10-14 in a warm place for 10-14 days.days.

During this time we shake it During this time we shake it and taste it. If a necessary and taste it. If a necessary aroma is developped, we filter aroma is developped, we filter it and then pour it in dark it and then pour it in dark bottles and seal them bottles and seal them securely.securely.

Performer: 7th class and teacher Performer: 7th class and teacher Jožica MuhičJožica Muhič

Rosemary leaves.

Jars filled with aromatic vinegars. Pouring some vinegar into the honey.

3. EXPERIMENT : 3. EXPERIMENT : MAGIC GLASSMAGIC GLASS

Kratka razlaga:Kratka razlaga: Potrebujemo košček Potrebujemo košček

papirja, kozarec, vodo.papirja, kozarec, vodo. V kozarec nalijemo vodo do V kozarec nalijemo vodo do

roba.roba. Na kozarec položimo kos Na kozarec položimo kos

papirja in naj položimo papirja in naj položimo dlan.dlan.

Kozarec obrnemo in počasi Kozarec obrnemo in počasi odmaknemo dlan. odmaknemo dlan.

Tudi ko roko odmaknemo, Tudi ko roko odmaknemo, papir sam zadrži vodo. papir sam zadrži vodo.

Izvajalci: 2. razred ob Izvajalci: 2. razred ob pomoči učencev 9. razreda pomoči učencev 9. razreda ter učiteljic M. Simončič in ter učiteljic M. Simončič in O. JeničO. Jenič

Pour some water in the glass and put a piece of Pour some water in the glass and put a piece of paper over it. paper over it.

Short explanation:Short explanation: We need a piece of paper, a glass and water.We need a piece of paper, a glass and water. We pour some water in the glass to fill it to the top.We pour some water in the glass to fill it to the top. We turn the glass over and remove the hand slowly.We turn the glass over and remove the hand slowly. Even when the hand is removed, the paper magically holds the Even when the hand is removed, the paper magically holds the

water in the glass.water in the glass. Performed by: students in class 2 ( aged 8 ) with the help of Performed by: students in class 2 ( aged 8 ) with the help of

students in class 9 ( aged 14) and teachers M. Simončič and O. students in class 9 ( aged 14) and teachers M. Simončič and O. JeničJenič

Made by: Ana PlantanMade by: Ana Plantan English translation: Jakob Imamović English translation: Jakob Imamović

and Slaven Teinovićand Slaven Teinović Mentors: Ankica Milošević ( photos), Mentors: Ankica Milošević ( photos),

Tina Šenica ( English version)Tina Šenica ( English version) Photo: Hana FabjanPhoto: Hana Fabjan Students: ages 8 and 12 , Students: ages 8 and 12 , Teachers: M. Simončič, O. Jenič, D. Teachers: M. Simončič, O. Jenič, D.

Kavšek, J. Muhič in M. StarihaKavšek, J. Muhič in M. Stariha