Rocks & Minerals: Metamorphic Rocks

Which statement best describes the formation of metamorphic rocks? - Magma cools and crystallizes slowly beneath Earth's surface. - Liquid lava erupts from a volcano and cools quickly at Earth's surface. - Sand and gravel are deposited at the mouth of a river and, over time, form layers that solidify into rock. - Ancient sandstone beaches become buried deep beneath the Earth's surface, where they are exposed to extreme heat and pressure.

Ancient sandstone beaches become buried deep beneath Earth's surface, where they are exposed to extreme heat and pressure.

In the formation of metamorphic rocks, what effect do temperature and pressure primarily have?

They change existing minerals.

Which characteristic is used to classify metamorphic rocks as foliated or non-foliated? grain size layer thickness arrangement of layers arrangement of grains

arrangement of grains

a metamorphic rock in which the grains are arranged in layers or bands

foliated rock

Which phrase describes how metamorphic rocks form? form from melting form at Earth's surface form from sediments form from existing rocks

form from existing rocks

Which type of rock is a foliated metamorphic rock? granite marble quartzite slate

slate

phrases that describe Foliated Rock

splits along bands forms in layers, slate

Which phrase describes foliated rocks? tend to break in half grains arranged randomly tend to split apart along bands grains arranged in increasing size

tend to split apart along bands

Which describes gneiss? igneous formed from shells tends to split along bands grains randomly arranged

tends to split along bands

Which phrase describes a metamorphic rock? formed from a volcano was once buried underground formed from evaporating water contains minerals that have not changed

was once buried underground

Which statements describe foliated rocks? pick more than 1 Examples include granite and shale. Examples include gneiss and slate. Grains form in parallel layers. Grains form in random patterns. Grains may form in curved, wavy layers.

Examples include gneiss and slate. Grains form in parallel layers. Grains may form in curved, wavy layers.

Existing rocks are buried and forced toward the mantle, increasing heat and pressure. This is the first step in the formation of metamorphic rocks. Which best describes the next step in the formation of metamorphic rocks? - Buried rocks melt deep within the mantle. - Lava melts underlying rocks, which crystallize into new minerals. - Rocks that were buried are exposed at Earth's surface, where they are weathered and eroded. - Magma pockets rise, which increases heat, and minerals change due to temperature and pressure.

Magma pockets rise, which increases heat, and minerals change due to temperature and pressure.

During the formation of metamorphic rocks, what is one event that leads to increased heat? Sun warms rocks. Magma pockets rise. Friction occurs between sliding rocks. Lava at Earth's surface flows over rocks.

Magma pockets rise.

During the formation of metamorphic rocks, what most likely causes pressure to increase? Magma pockets rise. Gravity pulls on rocks. Rocks melt deep beneath Earth's surface. Rocks beneath Earth's surface are forced toward the mantle.

Rocks beneath Earth's surface are forced toward the mantle.

Which statement describes the formation of metamorphic rocks? Rocks beneath the surface melt. Rocks above the surface are eroded. Rocks beneath the surface are forced toward the mantle. Rock layers near the surface decrease pressure on layers beneath them.

Rocks beneath the surface are forced toward the mantle.

Describe the formation of metamorphic rock

Rocks beneath the surface are forced toward the mantle. This increases pressure and heat. Magma pockets rise, increasing heat. Temperature and pressure cause minerals to change.

Which phrases apply to metamorphic rock formation? form from existing rocks form without melting appear foliated or non-foliated form from liquid rock form from deposition require heat and pressure to form

form from existing rocks form without melting appear foliated or non-foliated require heat and pressure to form

phrases that describe Non-Foliated Rock

forms in random arrangement quartzite does not split into layers

A geologist finds a metamorphic rock and notices that it has grains that formed in parallel layers. The geologist pries at the rock, and it splits apart along the bands formed by the layers. Which type of rock did the geologist most likely find? gneiss limestone marble sandstone

gneiss

Which is one characteristic that is used to identify types of metamorphic rocks? color rock size grain arrangement type of rock before metamorphosis

grain arrangement

Which describes slate? non-foliated igneous does not split into layers grains arranged in parallel layers

grains arranged in parallel layers

What causes metamorphic rocks to form from existing rocks?

heat and pressure

Which is one source from which metamorphic rocks form? soil particles igneous rock molten material sand particles

igneous rock

Which phrase describes non-foliated rocks? have grains in parallel layers include quartzite and marble tend to split along their bands form from crystallized magma

include quartzite and marble

Which type of metamorphic rock forms when limestone is exposed to heat and pressure? slate quartzite marble granite

marble

Which type of rock is non-foliated metamorphic rock? gneiss limestone marble slate

marble

a type of rock that forms when existing rocks are exposed to extreme heat and pressure

metamorphic rock

Which type of metamorphic rock has randomly arranged grains and does not split into layers? foliated banded massive non-foliated

non-foliated

a metamorphic rock in which the grains are randomly arranged

non-foliated rock

Which are the two agents that are necessary in the formation of metamorphic rocks? erosion and heat heat and lava lava and pressure pressure and heat

pressure and heat