Why does jelly set?
It is because of a protein called collagen which is found in our bodies. Collagen is made up of three protein fibers wrapped around each other.
Jelly contains gelatin, which is made from collagen which comes from animal bones and skin. When the gelatin is heated and mixed with water the protein fibers unravel and come apart, so the jelly from the packet melts. As the jelly cools the fibers coil up again trapping water between them, which makes the jelly set.
So, down to the fun bit for younger children. We watched the jelly from the packet melt as we added the hot water, and talked about bonds breaking down, and how they reform as the it cools making it set.
We also did some colour mixing and made some multi-coloured jelly.
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We had to let each layer set before adding the next for the multi-coloured version.
Did you know fresh pineapple stops jelly setting?
What other colours do you think we could make?
Suitable for KS1 – changes of state.
Don’t forget to check out our other kitchen science posts.
MsXpat
June 15, 2012 at 10:02 amI keep saying I’ll do this jelly play then I forget. You have inspired me. I’ll do it THIS weekend :0)
ScienceSparks
June 16, 2012 at 8:33 amThere is so fun fun to be had with jelly!
Susan Mann
June 15, 2012 at 3:10 pmRainbow jelly is great fun to make but they boys don’t always have the patience. x
ScienceSparks
June 16, 2012 at 8:33 amYes the layers take some time! Try the rainbow density tower if you want different colours instantly! x
Actually Mummy...
June 15, 2012 at 9:02 pmI am so doing this tomorrow – great excuse to get more colours of jelly!
ScienceSparks
June 16, 2012 at 8:32 amWho doesn’t like jelly? Would be a fun party game too!
The Mummy Adventure
June 17, 2012 at 11:34 pmThese would be great if you were planning for a party too!
pinkoddy
June 18, 2012 at 9:42 pmI never thought of talking about jelly in terms of bonds breaking down – I do like that :O)
maggy, red ted art
June 25, 2012 at 8:15 pmOooh what is not to love about jelly AND colour theory? Perfect experiment.
Thanks for sharing on Kids Get Crafty!
Maggy & Alissa
the mum
June 20, 2014 at 12:14 pmWho doesnt like jelly?!?! It reminds me of my youth….And it just tastes so damn good!
Malinda
March 8, 2017 at 9:24 pmBueno, se menciona que el carnet B para automáticos no permite el uso de cambio manual:”el . Este último es un carnet restrictivo porque no permite que el usuario conduzca coches con transmisión manual”El enlace lo incluyo porque hablamos del carnet B para automáticos en otra ocasión de forma más esiaÃcfpce.Gracias por los comentarios.