Monday, May 28, 2018
Last week, we looked at how a physical change happens when we mix borax, cornflour and glue together. The glue makes the particles from the other ingredients join together in a row like spagetti. Once we rolled it in our hands it became dry and rubbery and there we have it! Our own bouncy ball!
Tuesday, May 22, 2018
As part of our Inquiry topic, Change, we did the experiment where we dropped 7 mentos into a bottle coke. As scientists, we predicted, observed, experimented, then questioned. After listing the variables, we experimented with different types of carbonated drink. We tried using normal coke, Coke Zero and Sprite. We noticed that Coke Zero went the highest!
Tuesday, May 15, 2018
Wednesday, May 9, 2018
Today we became scientists and did an experiment called Bubbling Brew. We Mixed some citrus acid into water and observed that nothing happened. We put some baking soda into a balloon then tipped it into the water mixture. Immediately a chemical change took place and the mixture began to bubble as carbon dioxide was formed. The bubbling brew then blew up our balloon man!
This term our Inquiry topic is CHANGE. We have been looking at how matter changes from one state to another. So far we have learnt that there are three states of matter - solids, liquids and gas. The particles inside solid objects are packed close together which is why solid things take a shape and volume. Liquids are a bit different, the particles of matter are close together, but not as close as solids which means the force of attraction is weaker. Therefore liquids have a volume but not a definite shape. In gases, the particles of matter are very far apart which means the force of attraction is very weak. Gases don't have a weight or shape. We have also discovered that change is either physical or chemical and is either reversible or irreversible.