Question: What exciting, exploding, science experiment do you recommend that we can do as a year 8 class

Asked by imadinosaur to Carina, Emma, Hannah, Mel, Yashar on 31 Aug 2012.

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  1. Photo: Hannah BrownHannah Brown
    answered on 31 Aug 2012:

    Magnesium in acid is pretty great!

    Sodium in water is pretty amazing, but you definitely have to do that one outside and with a teachers supervision!

    Also, the mentos/coke experiments are pretty cool….
    Or what about a bottle rocket with a bike pump and a coke bottle?

    There’s loads… have you done any so far? What has your favourite experiment been?

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  2. Photo: Melina EllisMelina Ellis
    answered on 2 Sep 2012:

    This is a cool video of the alkali (Group 1) metals on you tube.

    https://www.youtube.com/watch?v=QSZ-3wScePM

    Caesium is my favourite but you’d need tonnes of safety precautions (something which might not be easy to do in a yr 8 class)

    I really like the Briggs-Rauscher oscillating reaction:

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  3. Photo: Carina MarshallCarina Marshall
    answered on 4 Sep 2012:

    I love some dry ice experiments. You need dry ice, water, some dish soap, some balloons, some bottles…have a look at my profile page for photos of what happens. Great fun.

    Otherwise…you can extract hydrogen from water using electrodes…fill up a balloon with it…and explode it! Great fun….

    My kids LOVE this show. Check it out. https://youtu.be/8TPnns-5UxA

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  4. Photo: Emma BurrowsEmma Burrows
    answered on 5 Sep 2012:

    Exploding gummy bears!

    A gummy bear (or any sugary lolly) is dropped into a test tube containing a few grams of molten potassium chlorate creates a big spectacle. The result is a violent chemical reaction that produces bright purple flames, lots of smoke and stacks of heat. The visible smoke is mainly of water vapour and invisible carbon dioxide.

    This is a good demonstration of how much energy is in a gummy bear! Thankfully we don’t have molten potassium chlorate inside our stomachs.

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  5. Photo: Yashar RazaviYashar Razavi
    answered on 7 Sep 2012:

    All the ones I know are dangerous! LOL

    They are called exothermic reactions, as the reaction results in so much energy/heat being produced that may result in an explosion

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