We let the vials of sand and water settle overnight. Look what we found! Silt! We drew another picture of our vial, this time showing the silt.
Now it's time to explore rocks. We observed a sample of river bed rocks with magnifying glasses. There were pebbles, gravel and sand.
How do we separate those rocks? Do we pick them out one at a time? That will take too long! We learned how to use different size screens to put the rocks into 4 different sizes.
We had a great time with rocks!