Saturday, January 22, 2011

Underwater Color Changing Volcano

This week we had more color changing fun in science.... and the kids really enjoyed our "underwater" volcano.... as the volcano changed from basic to acidic the color changed....it made a very pretty volcano....much like a lava lamp with lots of ever-changing floating bubbles... (due to the oil)

How we made it:

Fill the Test Tube (smaller glass/bottle) about 1/3 full....add 1/2 tsp baking soda and gently stir/shake to dissolve.... the water at this point will still be clear(ish)

Add 1/4 tsp of Red Cabbage juice powder and gently shake the test tube until it is uniformly blueSlowly pour Vegetable Oil into the test tube almost up to the lip
Measure 1/2 tsp of citric acid...then drop the citric acid into the test tube
After the reaction dies down, add another 1/2 tsp of citric acid and set the eruption off again. If you still want it to erupt and change to another color you can add in 1/2 baking soda....The End.....
For more fun science projects go check out Adventures in Mommydom.....

8 comments:

Lexi said...

Very cool!

Tracey M. said...

So great to see this step by step! Thanks for emailing me the directions :) I love how your son's eyes are glued to it.

An Almost Unschooling Mom said...

What a fun way to do that one!

Lindsay said...

Very fun! I need to start doing some more science experiments with Sammy. :-)

Regina @ Chalk In My Pocket said...

That's really cool, I haven't seen this done before! Where did you find the citric acid for your experiment?

Phyllis said...

Cool experiment. I have never seen this one.

Darcey said...

This is a neat science experiment! I've linked up to your post on my weekly favorites here: http://play2grow.blogspot.com/2011/01/weekly-favorites-for-january-23-2011.html I'm also a new follower of your blog.

Ticia said...

That is way too cool! I've never seen this one, I'll have to remember this for when we get to Hawaii for our state studies.

Thanks for linking up to Science Sunday!