Everywhere you look you are bound to see a rock of some kind. We use them in buildings, counters, houses and play with them on the beaches, lakes and ponds. But do we really know anymore than that? Sure we know the earth is basically just one big boulder orbiting around the sun, in line with other big boulders, but there is still so much more to them than meets the eye. Let’s get busy and talk rock.
As you probably already know, the earth’s crust is made up of over 50 percent rock. In turn these rocks are made up of minerals. In fact, there are 3,000 known minerals on our planet today. Minerals are also made up of elements and we have 92 different ones that can be combined to make a mineral.
Not all minerals are a combo, silver is a pure element, but granite has quartz, feldspar and mica that take form to create this amazing rock. In addition, minerals are arranged in repeating patterns that can produce a crystal – a lot of stuff goes into the making of a simple rock.
Rocks are categorized in three areas; igneous, sedimentary and metamorphic. But they don’t always stay one type of rock. In fact, different types of rocks are formed and reformed into each category. This is called the Rock Cycle.
All About Rocks
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