SCIENCE & CHANGE
Our presenters explain the process of science and discuss how we can all do really experiments that are safe and educational as well as a lot of fun. The theme of this workshop is about CHANGE and how we can learn about the variety of changes that occur in our world.

There are many changes found in science and they can be either:

Physical Changes - how they look and act
Chemical Changes - what they are made from

Most things change because they either gain or lose or are affected by energy. Most thing do not change without some sort of action or reaction from something else.

Some changes are permanent eg burning something or mixing chemicals
Some changes can be reversed eg water can be frozen and melted back to water again

This workshop demonstrates some different changes we can see in science and that some changes may be easy to see while others may be very slight or more difficult to observe.

We will use our EYES as a tool to detect changes but we can also use our other senses to experience changes in science.

Our program includes a large selection of the following experiments.....

The Two S Rules of Science: Sensible and Safe
Each workshop covers basic safety instructions helping students to realize the value of keeping safe while doing any experiment. We endeavour to stress to students the importance of keeping themselves and the environment safe from harm and to wisely use their science without causing more problems than answers.

Dry Ice
We introduce solid Carbon Dioxide and discuss its properties and how it reacts. We highlight the notion that dry ice is different from water in that changes from a solid to a gas rather than a liquid. The white "smoke coming off the ice is cooled water vapour from the air and not gas.

Dry Ice And Coloured Water
We demonstrate the reaction of water and the dry ice and the changes that occur. As the ice is heated by the water it reacts faster. Anything heated reacts fast. Eg a cold cup of tea wil not dissolve sugar as fast as a hot cup of tea.

Screaming Knife
Our special effect using the ice to make some really weird sounds. A great surprise for students! The cold air and gas released from the ice by contacting the "warmer" metal f the knife make the sound as it vibrates. The opposite occurs when a tin roof expands aon a hot day and we hear a cracking or tapping noise as he metal expands.

Professor Bernoulli - Hot Air and Ping-Pong
Find out how Professor Bernoulli discovers interesting things about air and motion while doing the housework. The Professor actually makes a visit with us and explains how Ping Pong can help us understand why space shuttles glide through the atmosphere! This experiment is a good mix of using science for practical purposes and helping students to understand how history can assist us in our modern inventions. The ball usually falls because of the effect of Gravity but the energy in the air stream is stronger tan gravity and changes how the ball reacts.

Rubber Glove And Dry Ice
Demonstrating the concept of how much space gases take up. Watch the glove expand before your eyes as the solid changes to gas. The gas takes up more space than the colder solid form and we can see this as it is trapped in the rubber glove.

Tube Tunes
Experiments with sound and vibrations. Students assist our presenter in making some music with their muscles and our special musical tubes. The air vibrates as the tube rotates. The ridges inside the tube make he air shake at a certain speed and we hear a sound - the faster the tube rotaed the higher he sound. Each sound is an octave higher than the next.

Love Potion
Get ready for some real chemical fun when one of the teachers shows us how to change a chemical solution in different colours just by breathing into it. We call it a "Loooooove Potion" but students will learn that its all to do with acids! This experiment also helps students to understand that chemical reactions is not merely a magic trick but a real transition from one thing into a new substance. 10 drops of Bromothymol blue and 1cm of water in a small, clear plastic cup with straw.

Changing Faces
We show how Your eyes can play tricks on you. We use a simple optical illusion to demonstrate that we can have different perspectives of the same thing and that we need to look at some things very closely to see how it really is. Our sense of sight is the most vital sense in detecting changes. This experiment also shows that changes can be very temporary

............................................

Jimmy's Face
Students help poor Jimmy get ready for his 'Big Date' with Zelda using a little chemical know-how and a few drops of 'Hypo' solution.

Cabbage Science
Simple chemical tests using the good old cabbage and some household chemicals. Ideal for observation and looking for change. And watch what happens when we drop a piece of dry ice into the solution!

Slime
Our slime recipe never looked so good! Using ingredients that can be bought from the supermarket, our presenters will show your students how to make a really cool chemical change that can also be used as a science toy. We bring out our slime machine for one last showing and tell your students how to make their own version of vomit slime! Disgusting!

Instant Cloud
Ever see a cloud appear inside a classroom? Well we show you how in this simple yet effective demonstration about air pressure and liquids. As the glove is lifted it creates a lower pressure in the jar. The water in the air of the jar condenses and we see the water vapour form tiny droplets like those found in a cloud.

Dry Ice And Hot Water
We end our workshop with a dynamic demonstration of chemical energy by making a huge cloud of gas and vapour in the centre of the room. Spectacular! The carbon dioxide is at -70oC and reacts very fast with the hot water (about 90oC) because eof the exchange of energy between the two substances. Anything heated will react faster.
Reminder to students not to attempt an experiments without he help of an adult or teacher. Refresh the 2S rule.