In this blog we want to show you the experiments we do in our Science Lab. Science is fun!
dimarts, 22 de desembre de 2009
divendres, 20 de novembre de 2009
dijous, 12 de novembre de 2009
MATERIALS: Cornflour Water Food colouring A bowl A spoon INSTRUCTIONS: - Put two glasses of cornflour into the bowl. - Add a glass of water and four or five drops of food colouring. - Mix everything. - Make a ball in your hands. Is it a solid or a liquid? - Hold it up in your hand. Is it a solid or a liquid?
The mixture is solid and liquid at the same time. Cornflour is made of lots of long tiny particles (molecules) which don't dissolve in water but spread themselves out. When you make a ball in your hands the particles join together and it looks like a solid; but when you hold it up the particles slide over each other and it looks like a liquid.
What do you think about? Write your comments.
dilluns, 2 de novembre de 2009
diumenge, 18 d’octubre de 2009
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.
What do you think about? Write your opinion!