Active Onions Science Experiment Plus More

Posted on Feb 5 2013 - 1:00pm by Jill R. (EnchantedHomeschoolingMom)

First of all, I want to thank Jill for having me over today!  I love Enchanted Homeschooling Mom and am very excited to be here!

This is the second week of my two-week blog tour celebrating the release of my new Ebook, Bears & Butterflies: 41+ Hibernation Activities!  As part of the celebration, I am visiting some amazing blogs, sharing free printables, and giving away a $10.00 Amazon Gift Card!!  Keep reading for more blog tour details!

Today I want to share a fun and easy science experiment that younger children will enjoy while older children can discuss it in more depth.  I call it Active Onions:

You will need: 

  • a red onion
  • a small pot of boiling water
  • household items to test: baking soda, fresh squeezed lemon juice, vinegar, etc.
  • small cups, test tubes, or another container to put household items in
  • goggles

Procedures:

1- Chop a red onion and cook it in boiling water for about three minutes.  Strain the onions (and put them in something yummy).  Save the onion water.

2- Let your children wear goggles and supervise them placing about a tablespoon of each household object in the small cups or test tubes.  Add about a teaspoon of the onion water, and watch the color change!

What Happened:

Different chemicals react in different ways with each other.  Some bubble, some fizz, and some change colors.  Onion juice will change yellow-green in some mixtures and pink-purple in others.

{Note for parents/older children: onions contain anthocyanins which are sensitive to pH–onion juice will turn yellow-green in bases and pink-purple in acids.  Also note that pH color changes are a physical change–they can be reversed.  Try adding baking soda to your vinegar and see if you can change the color back!}

Blog Tour Details:

1- To celebrate the release of my new Ebook, Bears & Butterflies: 41+ Hibernation Activities, I will be visiting eight blogs from Jan. 28th-Feb. 9th.  Each blog tour “stop” will include a freebie or flash giveaway AND a chance to enter a drawing for the Amazon Gift Card!

2- Carla is also being so generous to everyone and allowing me to host a giveaway of 6 fossilized shark teeth that average in length approximately 1/2 inch. How cool would this be to add a hands on component to your shark unit! Just enter the Rafflecopter below to win:

3- To enter the drawing for the $10.00 Amazon Gift Card, just leave a relevant comment to this post!  (If your email isn’t in your public profile, include that in your comment too.)  Everyone who leaves a comment at a post on the blog tour will be entered in the drawing.  Since there will be eight stops, you will have eight chances to enter.  Visit Preschool Powol Packets for a schedule and more details.  A winner will be drawn on Saturday, February 9th.

Thank you again, Jill, for hosting me today!!

Carla at Preschool Powol Packets and I connected when I was first getting my cyber legs in this blogging world. She has always amazed me and is a creative force to be reckoned with (not to mention super sweet!). I suggest hopping on over and following along with her site for fun activities that always keep coming. I have always loved her hands on science experiments!

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Jill runs "24 Paw Ranch" which is home to her husband, her two children, and their five dogs and of course herself. She spends her days actively homeschooling, baking in her kitchen, consuming loads of coffee, creating printables, watching Disney movies, crafting her way through the day, and occasionally getting more than 6 hours of sleep.

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