Experiments with water

Views:
 
Category: Education
     
 

Presentation Description

This presentation is part of the COmenius-project WATER IN OUR LIVES

Comments

Presentation Transcript

PowerPoint Presentation:

Water experiment 1 April 2013 grade - 3 Poland Comenius Project 2012-2013 Water in our Lives Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród

PowerPoint Presentation:

Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród What can make water freeze? It’s obvious that to freeze water we need low temperatures and some time. What if we don’t want to wait? As we had a very long and snowy winter we decided to do this experiment.

PowerPoint Presentation:

Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród To do this experiment you need: a metal cup, some water, some salt, a spoon and some snow. If you live in a country where snow is difficult to get you can use three or four ice cubes.

PowerPoint Presentation:

Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród First we poured some water (about the size of the cup) over the table to make the cup a little „sticky”

PowerPoint Presentation:

Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród Then we put the cup with snow on the water.

PowerPoint Presentation:

Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród Next we added some salt ( two spoons)…..

PowerPoint Presentation:

Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród …and mixed everything for few seconds.

PowerPoint Presentation:

Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród While mixing the snow inside was melting but outside the cup was gradually covering with ice and freezing into the table.

PowerPoint Presentation:

Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród Finally we managed to lift the cup off the table but with some difficulty. Why did it happen?

PowerPoint Presentation:

Water in our Lives Comenius Project 2012-2014 Szkoła Podstawowa im.M.C.Skłodowskej Tarnogród We usually use salt to melt the ice but this time it helped to freeze the water. Snow melts in 0 C degrees but salt lowers the temperature by few degrees not allowing the mixture to freeze again. So the water outside the cup is freezing faster than we expect.

authorStream Live Help