One of the experiments we've come across multiple times, in countless experiment books for children, is the underwater volcano.
Start with a tall glass jar, full of cold water (we used an old fish bowl).
Then, place drops of food coloring, and hot water, into a small necked bottle, or jar, that is shorter than your first jar (we used an empty almond extract bottle).
Once, the opening is uncovered...
...the "eruption" begins.
It's a lot of fun to watch.
And, it works for the same reason the smoke, from our recent forest fire , "erupted" so high into the air...
...and for the same reason we were able to fly our solar balloon.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjidUZJeJUPr21G9bptNwDlmjYGdx-5CZs_bGNonCJdorC6x5H4gv-_lxSQy3b8qaQq69Z1Mlv3odXTeJlG6yDiUeck1WUHHKnSDmGkwbId_5gmqITgTP8yOHHsk-SUJXF_OXhcSDCsZ2hB/s400/balloon.jpg)
We thought the best part of the underwater volcano, was watching the cooling drops of water start to fall - the children thought it gave it that hurling-lava-rock type quality, necessary for a really good volcano.
It's great to be a homeschooler.
6 comments:
This is awesome! I am definitely going to try it out when we do volcanoes for Hawaii.
I agree that this is awesome. I am going to have to do this. Funny, we have done lots of experiments with cold and hot water density and food coloring, but nothing this cool.
So cool! I have to try it. My kids love to make volcanoes.
This could also be a demonstration of the oil spill in the gulf.
I love all your experiments and this one is so easy and fun to do! We will bookmark this for sure!
I love that!! I must come back when I am not so tired and collect details and do this with my kiddos!! ;)
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