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, 23 de febrer de 2010

Magnetic pick up

MATERIALS: A strong magnet A paper clip Thread A piece of paper Clear tape Scissors Crayons
INSTRUCTIONS: Draw a kite and a rectangle in a piece of paper. Colour and cut them out. Put a paper clip on one corner of the kite. Tape a piece of thread to the opposite corner. Tape the other end of the thread to the rectangle. Tape the rectangle to a table. Hold the kite between your fingers and move the magnet away from the paper clip. The kite “flies”.
WHY?
Because a paper clip is made of metal and magnets have a magnetic field that attracts some kinds of metal. The paper clip does not have to touch the magnet to be pulled by magnetism.
WHAT DO YOU THINK ABOUT IT? WRITE YOUR COMMENTS.

dijous, 4 de febrer de 2010

Make a lava lamp

MATERIALS: -Food colouring. -Cooking oil -A plastic bottle -A funnel -Salt -Water
INSTRUCTIONS: 1. Put some water into the plastic bottle. 2. Add six drops of food colouring to the water. 3. Add a small quantity of cooking oil into the plastic bottle using a funnel. The cooking oil forms a layer on top of the water. 4. Mix everything. 5. Add some salt into the water. 6. Watch closely.
WHY? Oil and water don't mix because water is heavier. Oil makes a layer on the surface of the water. The salt sinks to the bottom and takes some oil with it. The salt dissolves in the water. Then, the oil floats back up to the surface.
WHAT DO YOU THINK ABOUT? WRITE YOUR COMMENTS.