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!


dimarts, 10 de gener del 2012

What temperature does water boil in Tibet?

We haven't been able to take photos of the experiment, but here you have a video about it:

http://youtu.be/eIUjsIuXgUE


MATERIALS:
- A jar with its lid
- Water
- A stove or microwaves
- A bag with ice
- A dishcloth
- A thermometer

INSTRUCTIONS:
- Fill the jar with water and heat it.
- Wait until water is boiling.
- Close it quickly.
- Put the bag of ice onto the lid to cool the air in the jar.
- Water starts boiling again.
- Open the jar and check the temperature.
- It's 80 degrees.

WHY?:
When we close the jar, the air on the top is very hot. When we cool it with ice, its volume diminishes and so does the pressure. This pressure is similar to the one in Tibet.

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2 comentaris:

  1. Carla22 de gener del 2012, a les 6:55

    I love this experiment but it was difficult to do it.

    ResponElimina
  2. Sara31 de gener del 2012, a les 8:56

    I LIKE THIS EXPERIMENT,
    BECAUSE I CAN KNOW WHAT IS THE TEMPERATURE WATER BOILS IN TIBET.

    ResponElimina

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