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Sticky Ice

Sticky Ice
Messiness: Medium
Age Range: 3y - 9y
Estimated Time: <30 mins

Activity Designer

Stephanie Sims
167 Projects
Is it possible to remove ice from a bowl without getting your hands wet? You can if you know the science behind it.....

How We Did It

Sticky Ice
Have a friend you want to challenge? Hand your friend a piece of string, and tell 'em to get the ice out of the bowl without getting their hands wet!
Sticky Ice
The first thing we had to do was put a bit of water in the bowl with the ice.
Sticky Ice

We put the string in the bowl. Can we get the ice out?

Sticky Ice

After leaving the string in for a minute or two and waiting, we pulled on the string. Anything? Nope! Nothin'.

Sticky Ice
Hmmm. We put the string back in the bowl,
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added some salt, shaking it over the string....
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Madeleine had to get fancy, and ran off to get the timer...
Sticky Ice
Waiting for about a minute....
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And will it work? Yes! So... is salt sticky? Magic? Not quite....
Sticky Ice

The freezing point is lowered by the salt (freezing is usually 32 degrees), so the ice melted a little and trapped the string, and then refroze again! It wasn't the ice but the unusually cold water that was making our science seem like magic. Now you know the facts... Who are you going to challenge with your mad scientist skills?

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