Welcome!

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!


dijous, 21 de gener de 2010

Fizzy Fun

Materials: Vinegar 2 glasses A piece of chalk (it is made of limestone) Several different rock types and minerals A magnifying glass

Instructions: - Pour a glass of vinegar into a glass. - Add a small piece of chalk (it is made of limestone). - Watch closely. After a few minutes, the piece of chalk starts to fizz. - Put another glass of vinegar into the other glass. - Put some different rock types and minerals into that glass (some of them contain limestone). - Watch closely. After a few minutes, some of them start to fizz and we can see bubbles.

WHY? Because vinegar is an acid and it dissolves small particles of calcium carbonate in the limestone (a mineral). We can see bubbles, because it releases carbon dioxide, a gas that rises to the surface. Rocks or minerals that contain calcium carbonate fizz. Those that don’t contain calcium carbonate won’t fizz.

3 comentaris:

  1. This experiment is very funny,because the effect is the best.
    Pol

    ResponElimina
  2. It's very very cool!
    Carlos and Belén

    ResponElimina
  3. This experiment is boring.

    Josecarlos

    ResponElimina