Key Points in this Chapter

KEY POINTS IN THIS CHAPTER

• Review the terms and sort out which represent processes involved in geography, which are structures involved in geography, and which are just types of rock.

• The three main types of rock are igneous, metamorphic and sedimentary.

• Rocks get acted on by chemical, mechanical, and biological forces to change them.

• Sediment can get layered out in air or water.

• All magma eventually cools with grains that depend on the rate of cooling. High rate means small grains, while low rates of cooling lead to larger grains.

• Pay attention to colors in rock as many represent a type of mineral.