2nd Grade Sorts River Rocks!

2nd graders have been investigating river rocks!  They began by observing and sorting the rocks by properties: color, shape, size, luster and texture. We were surprised at how most of the rocks were more than one color and many of them had patterns. 

We discovered that most of the river rocks were smooth, sparkly and had more than one color.

The next class we sorted the river rocks by properties again and put each sorted group into water to see if the rocks would change in any way.

We were so surprised that the dull rocks turned shiny and the shiny rocks turned dull when they were put in water.  And the river rocks changed color when they were wet. Some even turned green!