How can something poked with spikes and holes be leak-proof? We know that when an object has holes and you pour water on it, the water will obviously leak from the holes. But that actually depends on many factors. And for today’s experiment, we’ll find out how to make a leak-proof hedgehog and the science behind it!
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We will use a cute hedgehog drawing (not a real one) for this experiment since it’s almost fall and hedgehogs are commonly found in piles of dry leaves. These cute little hedgehogs are known for their spikes, which is perfect for our exciting experiment!
Materials for the Leak-proof Hedgehog Science Experiment:
- Ziploc plastic bag
- marker
- toothpicks
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Procedure for the Leak-proof Hedgehog Science Experiment:
Step 1 Get a ziplock plastic bag and draw your little hedgehog!
Step 2 Pour water inside the plastic bag, fill it up to three-fourths, and lock it. Make sure it is zipped well and no water leaks from the opening.
Step 3 Now grab the toothpicks and start putting the hedgehog's "spikes"!
Step 4 Observe the hedgehog. Is it really leak-proof? How did this happen?
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The Science Behind the Leak-proof Hedgehog Science Experiment
Is it magic? How did this drawn hedgehog become leak-proof even after pricking it with toothpicks? It’s definitely not magic, but we can explain it with science! You see, plastics are made up of polymers. These polymers are long and flexible chains of molecules. If you try to forcefully break them (like by poking them with a stick), they will immediately pull back together, resulting in a seal forming around the stick!
To extend your discoveries, try different scenarios and find out if the results would be different!
- Try a bigger stick or a pencil
- Try to poke it through the plastic
- Try to wiggle the stick to make a bigger hole
- Try to pull out the stick and put it back
What happened when you did these? Talk to your little one and discuss your observations and findings!
For more science experiments and discoveries, check out these exciting activities!
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