Studying a single rock
Select a single rock and try to learn as more as possible about it from careful observation. If it is flat, it is probably a piece or layer from Sedimentary formation. Like rocks were formed by the hardening of sediments laid down millions of years ago. If the rock appears to be made of fine sand grains cemented together it is probably sandstone. If it is made up of larger pebbles cemented together, it is probably another sedimentary rock known as conglomerate. If the rock appears to be rounded, it is probably the result of the stream action of water.