This week in Science (nine)

This week in science we identified different food products using a worksheet. The next day we went over this sheet and dicussed our thoughts on it. We then ordered rocks according to their hardness. My group got the extra credit on that one. Then we added five other items; a nail, a finger nail, a street-plate, glass and a strip of bronze. We then had to order these with the rocks. Scientists use these same materials to classify rocks with hardness. These materails give them known values that they can orginise the rocks around. Then on friday we learned about how minerals are in most everything including humans.