Surface Tension Experiment

Surface Tension (8)

This is one of those experiments that Travis and I couldn’t get quite right, whoops! But we tried and had fun in the process, which is sometimes all that counts.

The science behind the activity is that water molecules hold with strong bonds, so much so that they’ll fill the holes of a mesh bag even when tipped upside-down.

First, Travis checked out our mesh bag. It sure didn’t look like it would hold water!

Surface Tension (1)

We put it over a mason jar and secured with an elastic. Fill the jar about 3/4 full with water.

Surface Tension (2)

Place an index card on top and flip over. No water leaking yet.

Surface Tension (3)

Now the idea is to remove the index card – slooowly. According to the internet, sometimes it can just fall off, which works even better. Either way, the water should hold!

However, I think because every time we slid the index card out it wiggled the mesh bag, our experiment didn’t work.

Surface Tension (4)

We tried altering several variables. Securing the elastic tighter around the mesh didn’t make things work any better, nor did using a second, smaller-mouthed glass jar.

Surface Tension (6)

But you’ll notice from the giggles hat Travis wasn’t disappointed in the slightest. In fact, I think he liked the experiment better with the mess!

Surface Tension (7)

Did you get your water to hold? Please share in the comments!

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