Metamorphic rocks

1. Which phrase describes how metamorphic rocks form?

Form from existing rocks

1. 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.

Gneiss

Which describes slate?

Grains arranged in parallel layers

Which is one source from which metamorphic rocks form?

Igneous rock

During the formation of metamorphic rocks, what most likely causes pressure to increase?

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

Which statement describes the formation of metamorphic rocks?

Rocks beneath the surface are forced toward the mantle.

Which characteristic is used to classify metamorphic rocks as foliated or non-foliated?

arrangement of grains

Which are the two agents that are necessary in the formation of metamorphic rocks?

pressure and heat

Which is one characteristic that is used to identify types of metamorphic rocks?

grain arrangement

1. Which statement best describes the formation of metamorphic rocks?

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

Which describes a characteristic of quartzite?

Does not split into 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.

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

Which describes gneiss?

Tends to split along bands

Which phrase describes non-foliated rocks?

include quartzite and marble

During the formation of metamorphic rocks, what is one event that leads to increased heat?

magma pockets rise

Which type of rock is non-foliated metamorphic rock?

marble

Which type of metamorphic rock has randomly arranged grains and does not split into layers?

non-foliated

Which type of rock is a foliated metamorphic rock?

slate

Which phrase describes foliated rocks?

tend to split apart along bands

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

they change existing minerals

Which phrase describes a metamorphic rock?

was once buried underground