Posts Tagged ‘Kinetic’

I first saw the demonstration in the video below done by Clare Thomson at the “Best of PhysEd” lecture at the ASE Conference in 2010. Ever since I tried to make various versions of it, from using two very tall gas columns, filming it with high frame rate cameras, etc. But today I think I have made a really interesting variation of this really nice demo. The video below was made this morning in my kitchen.

Recreating this demo is very simple and I strongly recommend you do it with your classes, because the colours in the video don’t really reflect what you can see with your naked eye. I used water beads that I previously immersed in water containing blue food colouring for the cold water beads and red food colouring for the hot water beads. You will need to leave them in dyed water for about 8 hours. Then, I put cold water in the glass with blue beads and boiling water in the glass with red beads. When you mix cold and hot water with the cold water at the top, the red bead (much hotter) will rush upwards and the blue beads (much colder) will fall downwards. As the two types of beads swap places you have a nice simulation of what happens to the particles from hot and cold water, i.e. with more or less kinetic energy, when they mix. You have a very visual representation of a convection current forming in the two glasses. There is a limitation though, in fact, you can see that after a while the red beads begin to fall and collect at the bottom on top of the blue beads, but this is still quite effective at making the point that they have swapped places.

Advertisements

At last I have found some time to check Prezi out, and it’s even better when you can use this time to fit it in with your job. As a Field Officer at NGfL Cymru, I am trying to develop resources that give opportunities to learners and educators to explore the latest technology and its applications in sound Learning and Teaching. So, I could not leave Prezi out, especially after all the feedback I had received before I started using it myself! However, I wanted to find a use that was not just different from another way of presenting (which in my opinion is not the point and certainly not what would make Prezi stand above PowerPoint, because we’ll soon have death by Prezi if we are not careful),  but that would have real educational value and that would be an advantage to anyone using Prezi in this way!

To cut a long story short, I was wondering what it would be like to mind map with Prezi, and by mind mapping I mean following the mind mapping rules set up by Tony Buzan (the creator of Mind Mapping himself). One of the greatest advantages of Prezi in drawing mind maps is the ability to embed videos in your Prezi mind maps, something we haven’t seen before (at least I haven’t in other mind mapping software). Also, assigning a path to your mind map allows you to show and share your thought process very clearly. In this way using a Prezi mind maps could become a very effective presentation tool, but also a revision tool for your students who will need less assistance from the author of the mind map, because the sequence of events and areas of focus is decided by the path set by the author themselves! However, if a learner prefers to go at their own pace and stroll around your mind map their way, they can still do this by zooming in and out with the scroll on your mouse. You can also set the Prezi to be public and with the option to be copied by people who bump into them! So, your students could copy your Prezi mind map in their Prezi accounts and edit it to make it more suitable to their learning style, or simply add to it. Why not starting a template Prezi mind map and let the learners complete it? Then, you could share the contributions from different pupils in the class and complete your draft as a collaborative mind map created with each learner’s contributions, which is a very useful and highly effective mind mapping technique!

Click here, or on the image below to see my first Prezi Mind Map on the Kinetic Theory.