Tuesday, 8 July 2008

Milk explosions

It's been far too long since I showed you my geeky side, so here is a fun little experiment to try with small people. I found it here and there are lots more to try! (Apologies in advance if I explain this badly. The original site undoubtedly does a far better job)

You will need:


A plate
Some milk (semi-skimmed or whole - skimmed won't work well, if at all)
Food colouring
A cotton bud (or tissue wrapped round a skewer worked for us)
Washing up liquid

First have your small helper pour some milk into the plate:


Now add food colouring - we found it works best if you use quite a lot:


Dip the tissue into the milk to get it wet, remove it, then drop some washing up liquid onto the tissue and carefully put it back into the milk - DON'T SWIRL IT!


The colours fly around the plate, making gorgeous swirling patterns as the detergent molecules desperately try to stick their fat-loving heads into the milk fat globules, and mess with the surface tension, churning everything up and shifting the molecules around. The food colouring gets taken along for the ride!


We kept adding drops of detergent to the tissue and placing it at different places in the milk until it stopped shifting. We had to do this three times before the novelty wore off ...

30 comments:

  1. I want to do this NOW!
    The only problem is that it is midnight - I wonder if I manage a quick milk explosion before MrM notices I am not doing the ironing.

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  2. You can also just drop the drip of detergent onto the milk aside the colour. It makes the colour shoot along very fast. Tres cool, I agree!

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  3. Oh, COOL! Both of my young 'uns will love this!

    (And to think I was just wondering if you were missing your eucaryotic genomes...)

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  4. You are my favourite geek! Now where's the food colouring....

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  5. looks fantastic - one to remember for the summer hols! just off to look at that link now.

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  6. I love your geeky side! This looks like so much fun.

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  7. That looks like fun. I wonder if you could use fabric colour with the milk and detergent and somhow get that lovely mix onto fabric in some way - what do you think? I might just have to try it. I'll wait 'till the weather's better and we can do it outside.

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  8. We ahd a day of experiments today. Great fun. Didn't do this one though. Will try and set it up for tomorrow though as it looks cool.

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  9. Ooooh fab! This has gone straight onto our 'Things to do in the summer holidays' list!
    Thanks for the great link too - I'll find lots on there to keep the naughties busy :)

    xxx

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  10. Your kids no doubtedly will love your geeky side!
    What a fun experiment!

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  11. Oh I love your geeky side! Perhaps you can bring it along with you when you move in (if you don't mind seeing the piles of ironing that are always just out of shot on my photos!)
    Kimx

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  12. Ooooo! Cool kid science. We shall add this to our list of experiments to play with over the holidays - thanks =)

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  13. Hello rhubarbwine: oooh, that sounds exciting!

    Hello Julia: I bet you could do something with just swirling fabric paint onto soapy water, or maybe oil & water? Hmmm, you're right, it's worth a try. But not today as it is persisting down ...

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  14. Oh, that looks such good fun. Definitely one for the summer holidays - thank you for that! x

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  15. Wow got to try this one with the kids they will love it.

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  16. Wow - looks like fun, not to mention pretty!!!! I think I have to check the pantry and see if there is any colouring in there!! And don't be ashamed of your geeky side, I am the same and cant wait to do my taxes every quarter and year so I can so some maths (my secret first love!!!)

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  17. Thanks so much for visiting my blog. Your own blog is full of crafty goodness and I will definitely be back.

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  18. Thanks for this - it looks like lots of fun and perfect timing too as I'm trying to stockpile lots of ideas for things to do over the school summer break! A belated well done for completing the race in the previous post!

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  19. That's a fab one! Keep up the geekiness please!!! Lucy x

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  20. WOW! I'll be having a go at this :)

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  21. Nerd alert! Fantastic! I was wondering when we might see some experiment action. We'll be giving that a go!

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  22. What a fun idea :o) I've never heard of this before!

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  23. Ooooo fun! Are your girlies are lucky to have such a geeky mummy! ;o) So nice to catch up on your posts! We're just back from England, and had FAB time in London! Now resting travel-weary feet and doing lots of laundry--LOL! Happy Summer Days to you all ((HUGS))

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  24. ooh you have so many ideas!! I wish I had known these when my kids were younger, although they would probably still like to do things like this now ;)

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  25. I WANT TO TRY!!!(rummages for food colouring - drat, none there...I used it all trying to dye a blanket)

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  26. I like this - no mess involved and its outside! Geek is chic!

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  27. Whne the boys come home from school..guess what we are going to be doing...FAB thanks:-)

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  28. Looks like great fun. Can you get the colours onto paper in the same way as marbling? I may need to invest in some more colours - we only have pink!
    Cathy X

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  29. OMG, the words "quite a lot of food colouring" fill me with fear and terror. I look forward to seeing my children with their fingers/clothes permanently stained in the very near future.

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