My kids have always accumulated a large collection of rock and we brought a few favorite rocks back from the UK with us that they couldn't part with. Currently the kids are assembling their own rock collection from with in the USA as we travel. It is easy to find igneous and sedimentary rocks, but metaphoric rocks are proving to be a bit harder but we will continue to look while we are in New Mexico . Before heading out on holiday we learned about the MOHS scale and determining the hardness of rocks.
|I found this kit at a local gift shop and brought it home there are several different kinds that can be found on Amazon|
|Daddy once again helped us with this assignment as he is a geology major|
|We used various ways to determine the rocks hardness, fingernail, nail, and streak test|
|Kids were a little disappointed to see that 80% of the rocks leave a white streak, the only ones we had that didn't were coal.|
|The kids couldn't wait to try the pumice stone in water|
|they were so excited to see it float|
|and tried to sink it many times|