Friday, September 25, 2015

Rock hardness test

We tested the level of hardness of the rocks in our rock collections. First, we tried to rub some of the rock off with our finger.  Then we scratched it with our fingernail to see if it would show a scratch. After that, we scratched our rocks with a penny and lastly a nail. 

We kept track of our data using a chart so we would remember our results. 

Hopefully your geologist shared their results with you at home!

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