There are over 5,000 known types of minerals. Just a few minerals make up most of the rocks we see, though: feldspars, amphiboles, quartz, olivine, garnet, micas, calcite, and pyroxenes.

There are lots of types of rock and each type has different ... local area - how many can you spot? Make a list of all the different rocks you saw. Can you think of ways to group and compare ...