Science experiments for children – Fountain from plastic bottle.It needs only a bottle, a little water, a straw, and a piece of clay. Ask the child to blow through the straw as hard as he can, as long as he does not have the feeling that the bottle is full. Observe the fountain …
http://thefantasticfive-hockmana.blogspot.com
Science experiments for children – Fountain from plastic bottle
Variant
You can get an increase in pressure inside the bottle also through the heat.
Take a glass bottle with a screw cap, colorant, a straw, clay, a bowl, cold water and a pot of hot water, scissors.
Heat the water in the teapot. Remove the cap from the bottle glass and fill in half with colored cold water.
Drill a hole in the cap, screw on tightly, place the straw so that it is below the water level and seal it with clay all around the cap and straw.
With a little clay make a cap for a straw. Now put the bottle in the bowl and pour the boiling water into the bowl.
Also in this case the water will come out with a gushing, because the warm water in the bowl heats the air in the bottle; the heated air expands and occupies more space then forces the water towards the outside, through the straw.
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Science experiments for children – Fountain from plastic bottle
Other links
http://pbskids.org/zoom/activities/phenom/bottlefountain.html
http://thefantasticfive-hockmana.blogspot.com/
http://www.arvindguptatoys.com/toys/Threebottlefountain.html
http://www.abc.net.au/science/articles/2012/11/14/3631891.htm
http://www.learnwithplayathome.com/2012/07/science-for-kids-water-bottle-fountain.html
