LPKW+5.1

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=5.1 Classifying Rocks=

Vocabulary

 * texture**-the look or feel of a rocks surface
 * grains**-a particle or mineral that give rocks their texture
 * Igneous rock**-a rock that was once magma and cooled
 * sedimentary rock**-another type of rock or the remains plants or animals pressed together
 * metamorphic rock**-A kind of rock that forms when another rock is changed by heat pressure or chemical reactions

Outline

 * Classifying rocks**
 * How geologists classify rocks
 * scientist determine where the rock was formed or use texture
 * Texture
 * color does not provide much information to identify a rock
 * this is why scientists use texture
 * Grain size
 * rocks have grains in different sizes
 * Grain shape
 * Grains can come in different shapes
 * Grain pattern
 * the grains of a rock forms in different patterns
 * no visible grain
 * grains can be invisible
 * Mineral composition
 * Origin
 * There majar types of rock, igneous, sedimentary, and metamorphic