Science Weekly: Making Crystals

I kind of fell apart this summer on Summer of Science. Oh well. I’m picking up the thread and instead of trying to do one thing a day I’m going for one thing a week. Last week (as this series will run a week behind) we did a little experiment with making crystals. If you follow me on Instagram you will recognize the pictures and the activity. The series here on the blog is intended to document what we’ve done and make it possible for you to recreate it at home. 

Why I chose this project: Cam found her rocks and crystals and has been playing with them. We started talking about minerals and rocks and reading up about them a bit. I thought she might be interested to see how crystals form. 

img_3553 img_3555 img_3582

 

 

 

 

 

 

 

 

 

What we did:

The set up was pretty simple. String tied to a stick and dangled in a jar. I mixed equal parts hot water and three different substances: table salt, sugar, and Borax. I had Cam help mix up the solutions and then dip the strings into the jars.

We left them out for a week and she would check them periodically throughout the day, every day. The top right picture shows the Borax crystals after about 30 minutes. The picture on the bottom shows them after a week. The sugar solution only developed mold, no crystals. I think next time I would go for another type of salt, kosher or sea, instead. Either that or made the sugar solution more concentrated. 

I had Cam draw pictures of the results in a journal and dictate comments to me about what had happened. She enjoyed that part of the experiment too. Next up is talking about how this relates to actual rock and crystal formation.

Comments are closed.

Post Navigation