This is a blog of the 4th grade class in la Farigola de Vallcarca School in Barcelona. This year we are doing “Aula de Ciències” in English.
In this blog we want to show you the experiments we do in our Science Lab. Science is fun!

diumenge, 18 d’octubre de 2009

Floating paper clip

MATERIALS: Paper clips Water Bowl INSTRUCTIONS: - Fill the bowl with water. - Unfold one paper clip to use as a tool. - Rest another clip on the tool. - Gently lay the clip flat on the water, then remove the tool. - The paper clip should float. WHY: Water holds together at its surface with a kind of rubbery “skin”. This tendency of a liquid to form a skin, called "surface tension", is what keeps the paper clip up.

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