Rocks Chapter 5

Igneous rock that cools very quickly when it forms may have a texture that is

• smooth and shiny with no visible grain.

• multicolored and banded

• made up of jagged grains

• coarse grained

When all the grains in a rock are large and easy to see, the rock is described as

• extrusive.

• fine grained.

• coarse grained

• nonbanded

Rock that forms from the cooling of magma below the surface or lava at the surface is called

• . sedimentary rock.

• metamorphic rock.

• igneous rock

• coarse-grained rock

Where does most metamorphic rock form?

• at the surface

• just below the surface

• in ocean waters

• deep underground

Igneous rock that formed from lava that erupted onto Earth’s surface is called

• extrusive rock.

• intrusive rock

• clastic rock.

• sedimentary rock

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The process by which sediment settles out of the water or wind carrying it is

• compaction.

• cementation.

• deposition.

• erosion.

To describe a rock’s texture, geologists determine

• the color and density of the rock.

• how the rock formed.

• the size, shape, and pattern of the rock’s grains.

• how many minerals the rock contains

Chalk formed from sediments made of skeletons of microscopic living things in the ocean must be a(n)

• metamorphic rock

• organic-sedimentary rock

• clastic-sedimentary rock.

• igneous rock

What forms the structure called a coral reef?

• skeletons of coral animals

• particles of clastic rocks

• deposits of coral rocks

• cementation of crystals

Over time, coral buried by sediments can turn into

• granite.

• . limestone

• coal.

• atolls.

Tags

NGSS.MS-ESS2-1