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Saturday 23/02/08
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  •  Welcome to the CHaOS Demonstrators Page  

    CHaOS is a student-run society at the University of Cambridge. We organise hands-on science events throughout the year at schools and public events, visiting venues in the Cambridge area and across the country. We have almost a decade of experience in inspiring children and families about science.

    All our events are staffed by enthusiastic student volunteers who demonstrate the experiments. If you'd like to know more about helping then email us at contact@chaosscience.org.uk to be added to our news email list. Over 1000 volunteers are on the list and we send a few emails each term advertising our events. Just reply if you'd like to help!

    Our largest event is Crash Bang Squelch! at the end of Lent term, as part of National Science Week and the Cambridge Science Festival. This popular event normally attracts over 2000 visitors and involves over 150 student demonstrators. We also tour the country over the summer. Read about our Tours.

    This website is for our student demonstrators. We also have a website for the general public which can be found at www.chaosscience.org.uk. Find out how to do and explain lots of our Physics, Chemistry, Biology and Medical experiments. These are not instructions just examples to get you thinking. You may be interested in some general things we have learnt about demonstrating.

    The idea of this site is to try and communicate ideas between demonstrators, so please make comments, write explanations of any experiments you have demonstrated, or suggest new experiments.

    Here are some recently added articles:


     Human Snail Suit Email Article To a Friend View Printable Version 
    27/06/08 @ 14:10 BSTanthony  
    Ideas

    Some clever person has built a robotic snail. Cool. We all know snails use slime to slip over surfaces so the question becomes: How can one half of the snail grip if the other half is sliding? And of course the big question about snails is how can they hold themselves of smooth vertial surfaces when covered in slime. Clearly our shear thickening friend the non-newtonian fluid must come into play.

    The journal article explains how a robot snail worked. Anyone want to work out the feasibility of a human snail suit? My personal favourite is the idea of the inverted traverse. Links below.


    read more (6 words) 1 comments
    Most Recent Post: 07/31 09:12AM by Dave
     
     

     Cracking paper R.A. Email Article To a Friend View Printable Version 
    06/06/08 @ 22:36 BSTDave  
     
     

     Cracking Paper Email Article To a Friend View Printable Version 
    06/06/08 @ 22:15 BSTDave  
    Physics ExpsStretch pieces of paper with various different shaped holes.  
     

     Record Breaking Mentos and Coke Explosions Email Article To a Friend View Printable Version 
    29/04/08 @ 08:56 BSTrachel  
    Chemistry IdeasA saw this article about adding mentos sweets to coke bottles and thought it would be fun for CHaOS to do - great pictures:
    http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2008/04/23/ncoke123.xml
     
     

     Spinning eggs RA Email Article To a Friend View Printable Version 
    24/02/08 @ 15:03 GMTrosy  
    Spinning and stopping fresh and cooked eggs

    RISKS
    1. If dropped on floor eggs may smash, causing a slip hazard.
    2. Some people are very allergic to (especially raw) egg.

    CONTROL MEASURES
    1. Spin eggs in a shallow tray to reduce risk of dropping them
    Have equipment available to clear up.
    2. If an egg is broken ensure it is thoroughly cleared up, keep visitors away from area until area has been cleaned.

    IN CASE OF ACCIDENT
    1. In case of injury call first aider
    2. Anyone with a level of allergy which might cause a major issue should be carrying appropriate drugs etc and they (or their carer) will know what to do. Risk is no greater in this case than going into a supermarket.
     
     

     Spinning eggs Email Article To a Friend View Printable Version 
    24/02/08 @ 15:00 GMTrosy  
    Physics ExpsSpin an egg, either cooked or fresh.
    Stop the spin with one finger for a moment, then let go.
    The fresh egg will start spinning again because the inside of the egg will carry on spinning when the outside stops and will cause the outside to accelerate again. The cooked egg will stop dead.

    2 comments
    Most Recent Post: 03/27 09:48AM by MarkD
     
     

     Cloud formation in a bottle RA Email Article To a Friend View Printable Version 
    24/02/08 @ 14:27 GMTrosy  
    Strike a match, extinguish it and drop it into a bottle containing a little water

    RISKS
    1. Using matches, possibility of burns.
    2. If lit match is dropped on something flammable small risk of fire.

    CONTROL MEASURES
    1. Ensure that matchbox is not available to be grabbed by children.
    Demonstrator to strike matches away from self but also to take care not to strike immediately towards visitors.
    Ensure match is no longer lit when dropped into bottle.
    Have a cup (or similar) of water to hand to take matches which might be lit and not used.
    2. Keep flammable materials away from matches.
    Have a fire extinguisher available.


    IN CASE OF ACCIDENT
    1. Run burns under cold water for at least 10 minutes.
    Contact a first aider.
    2. Fight fire if safe to do so.
    If fire gets out of control evacuate area and call 999.
     
     

     Cloud formation in a bottle Email Article To a Friend View Printable Version 
    24/02/08 @ 14:22 GMTrosy  
    Physics ExpsDemonstrate cloud formation as air pressure drops.
    A smoking (recently blown-out) match is dropped into a lemonade bottle containing a little water. The bottle is closed and then squeezed, held for a few moments, and released. Water condenses on the nucleation points provided by the smoke as the air pressure drops and temperature falls slightly.
     
     

     Magnets and TVs Email Article To a Friend View Printable Version 
    23/02/08 @ 18:11 GMTDave  
    Physics ExpsWave magnets near TVs and watch the response.  
     

     Spectra RA Email Article To a Friend View Printable Version 
    23/02/08 @ 18:07 GMTDave