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.

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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