My kiddos are ALWAYS up for a fun Science Experiment, and when I saw this Sink or Float activity on Pinterest, I knew we had to give it a try!
I grabbed two glasses of water, filled them about 3/4 of the way full, and then I nabbed two Halo mandarin oranges from the fridge.
I left one orange as-is, but peeled the other one, and then we got started with our experiment!
I began by asking my kiddos what they thought would happen to each one if we placed it down in a glass of water.
Would the orange with the peel sink? Or float?
Would the peeled orange sink? Or float?
I loved their little answers – Kids come up with the best explanations!
Just to give you a heads up, I’m going to go ahead and let you know what happens!
The orange with the peel floats…
…and the peeled orange sinks!
What’s the explanation? Here ya go!
The unpeeled orange floats because the rind is very porous and filled with tiny pockets of air. Even though you’re removing mass when you peel the orange, the peeled orange is more dense and sinks in the water.
Kids will love watching what happens, and they will get especially excited if their scientific guesses are correct. Would your kids enjoy some activity sheets to use as they make their predictions?
I’ve made some for you that you can access for free!
Psst…you can even try it with lemons and limes! Same scenario! Same result! Let me know what your kids think!
If you enjoyed this post, you may also want to check out how we made balloons magically expand:
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