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.

A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type ... rock that has cooled and solidified. The inside of the Earth is ...

What FACTS ABOUT ROCKS do you know? They are abundant on earth, and yet little is known about them. These facts will increase your knowledge of the rocks.

7. Describe that the same behavior happens for many types of rocks. Tell the students that temperature and pressure increase as one goes deeper in the Earth, so that the deeper Earth material ...

The plates make up Earth's outer shell, called the lithosphere. (This includes the crust and uppermost part of the mantle.) Churning currents in the molten rocks below propel them along like a ...

Weathering and erosion slowly chisel, polish, and buff Earth's rock into ... that dissolves rock. For example, acid rain dissolves limestone to form karst, a type of terrain filled with fissures ...