The teacher used to come to see is the soil, rocks, sand, a creature that occurs naturally, and the various constructions, such as school buildings, cars, fences, brick is what human life is not created.
Teachers bring samples back to earth, rocks, sand creatures that occurs naturally and structures such as buildings, vehicles, fences, brick life is not man-made.
Teachers take a sample to see is the soil, rocks, sand creatures are natural and all construction activities, such as building, car,. The fence, brick is a non-living things man-made.