Three Classes of Rock

Name the two types of metamorphic rocks.

• Organic

• Foliated and nonfoliated

• Chemical

• Intrusive and extrusive

Name the two types of igneous rocks.

• Organic

• Foliated and nonfoliated

• Chemical

• Intrusive and extrusive

Name the three types of sedimentary rocks.

• Intrusive and extrusive

• Foliated and nonfoliated

• Clastic, chemical, and organic

• Conglomerate and sandstone

What is a rock?

• A naturally occurring, solid combination of one or more minerals or organic matter

• Magma cools slower underground making rocks with larger crystals with course texture

• Lava cools faster on the surface and makes rock with small crystals with fine texture

• Erosion, deposition, compaction (burial), cementation

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

What do we call the size, shape, and positions of grains in a rock?

• Its makeup

• Its texture

• cementation

• composition

What kind of rock can turn into metamorphic rock?

• With enough pressure and heat, any existing rock can turn into metamorphic rock

• With enough pressure and heat, only metamorphic rock can turn into metamorphic rock

• With enough pressure and heat, only sedimentary rock can turn into metamorphic rock

• With enough pressure and heat, only igneous rock can turn into metamorphic rock

What type of rock do we get from the cooling of magma under Earth’s surface?

• Chemical igneous rock

• Extrusive igneous rock

• Intrusive igneous rock

• Organic igneous rock

What type of rock do we get from the cooling of lava on Earth’s surface?

• Chemical igneous rock

• Extrusive igneous rock

• Intrusive igneous rock

• Organic igneous rock

How does the rate at which magma and lava cool affect the size of the crystals and texture of an igneous rock?

• _{Magma cools faster=small crystal=fine-texture}

  _{Lava cools slower=large crystal=coarse-texture}

• _{Lava cools faster=small crystal=fine-texture}

  _{Magma cools slower=large crystal=coarse-texture}

Rocks that have straight horizontal bands are normally what type of rock?

• Chemical sedimentary rocks

• Clastic metamorphic rocks

• Organic igneous rocks

• Clastic sedimentary rocks