Who doesn't love crystals? But our contaminated solution gave us unexpected results! This week we learned about the 5 characteristics of a mineral and how rocks are made up of various minerals. We studied alum and the amazing crystal structure that it forms. I made some at home and we appreciated the uniqueness of the shape...
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| An alum crystal |
...but when we tried it at school we learned a little about contamination. With enough time to try the process twice, we still have not found the contaminant. We did get some interesting crystals though! The shape of our tells us that Alum is not the only mineral that was present in our water. Here is a picture of the second attempt by the 7th and 8th graders (3:30 PM Friday)...
This week we are also learning about finding the density of rocks and minerals. We are using graduated cylinders and a digital scale to figure out the density (g/cm3). (Sixth grade pictured here)
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Mrs. Tiday