Metamorphic Rocks

Which statement describes the formation of metamorphic rocks?

Rocks beneath the surface are forced toward the mantle.

Which image shows a foliated metamorphic rock?

The third rock which should look brown.

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

They change existing minerals.

Which phrase best explains the meaning of the word metamorphosis?

to change form

Sort words and phrases related to foliated and non-foliated rocks into the correct categories.

Foliated Rocks - splits along bands, forms in layers, slate Non-Foliated Rocks - does not split into layers, forms in random arrangement, quartzite

This image appears in an Earth science magazine with this caption: "A non-foliated rock found in the Himalayan Mountains." Is the caption for this image correct? Why or why not?

No, because the grains are arranged in thin, parallel layers.

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

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

Fill in the blanks to complete each statement about metamorphic rocks.

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? Check all that apply.

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

The image shows metamorphic rock. Which phrases accurately describe this rock? Check all that apply.

formed underground formed by extreme heat and pressure layers that tend to split apart along bands

A geologist discovers a new rock formation. The rock is dark in color and appears to have formed in layers. The layers are thick and not parallel but instead show some folding. Which type of rock did the geologist most likely find?

gneiss

Which types of rock are foliated metamorphic rocks? Check all that apply.

gneiss slate

Which phrases describe foliated rocks? Check all that apply.

grains form in parallel layers tend to split apart along bands

What causes metamorphic rocks to form from existing rocks?

heat and pressure

These are two metamorphic rocks. Which statement about the rocks is accurate?

The rock on the right is foliated.

At which location are metamorphic rocks most likely to form?

B

Which statements describe foliated rocks? Check all that apply.

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

Which type of metamorphic rock forms when limestone is exposed to heat and pressure?

marble

Which type of rock is non-foliated metamorphic rock?

marble

Which words or phrases describe gneiss? Check all that apply.

metamorphic tends to split along bands forms under heat and pressure

Which words or phrases describe characteristics of quartzite? Check all that apply.

non-foliated metamorphic does not split into layers