jcjc5.1

Classifying rocks
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Vocabulary

 * Grains:** Grains give the rock it's texture.
 * Igneous rock :** Forms from the cooling of molten or lava below the surface.
 * Sedimentary rock:** Forms when the particles of other rocks or the remains of plants and animals get pressed and cemented.
 * Metamorphic rock:** Forms when an existing rock is changed by heat,pressure, or chemical reactions.

outline

 * how geoligists classify rocks**

texture


 * grain size


 * grain shape


 * grain pattern**


 * no visisble grain


 * mineral composititon**

origin