Rocks

Rock formed by extreme heat and pressure

• banding

• sedimentary rock

• parent rock

• metamorphic rock

Answer explanation

Metamorphic rock is formed from existing rocks that undergo extreme heat and pressure, altering their structure and mineral composition. This distinguishes it from sedimentary and parent rocks.

The rock from which a metamorphic rock is formed is called?

• banding

• non-foliated metamorphic rock

• parent rock

• metamorphosis

Answer explanation

The rock from which a metamorphic rock is formed is called the parent rock. This term refers to the original rock that undergoes metamorphism to create a new rock type.

A metamorphic rock that does not have a banded or layered appearance.

• mafic rocks

• organic sedimentary rock

• banded

• non-foliated metamorphic rock

Answer explanation

A nonfoliated metamorphic rock does not show banding or layering, distinguishing it from foliated types. Examples include marble and quartzite, which form under different conditions than those that create banded rocks.

4.) The concentration of minerals in discrete layers in metamorphic rocks.

• bands

• non-foliated metamorphic rock

• parent rock

• metamorphism

Answer explanation

Banding refers to the concentration of minerals into distinct layers in metamorphic rocks, resulting in a striped appearance. This process is a key characteristic of foliated metamorphic rocks.

5.) Formed by heat and pressure. Has lines, bands, foliation (gneiss, slate).

• chemical sedimentary rock

• foliated metamorphic rock

• bands

• non-foliated metamorphic rock

Answer explanation

The question describes rocks formed by heat and pressure with lines and bands, indicating foliation. Gneiss and slate are examples of foliated metamorphic rocks, making 'foliated metamorphic rock' the correct choice.

6.) It forms when minerals crystallize from a solution to become rock.

• clastic sedimentary rocks

• organic sedimentary rock

• chemical sedimentary rock

• foliated metamorphic rock

Answer explanation

Chemical sedimentary rocks form when minerals crystallize out of a solution, such as from evaporating water, leading to rock formation. This distinguishes them from clastic and organic sedimentary rocks.

A sedimentary rock is formed from the remains of plants or animals.

• organic sedimentary rock

• chemical sedimentary rock

• foliated metamorphic rock

• bands

Answer explanation

An organic sedimentary rock forms from the remains of plants or animals, distinguishing it from chemical sedimentary rocks, which form from mineral precipitation, and metamorphic rocks, which arise from existing rocks under heat and pressure.

A sedimentary rock made of broken fragments of pre-existing rock.

• mafic rocks

• clastic sedimentary rocks

• organic sedimentary rock

• parent rock

Answer explanation

Clastic sedimentary rocks are formed from the accumulation of broken fragments of preexisting rocks, making them the correct choice for the description provided.

Dark-colored rocks that have low silica content and are rich in iron and magnesium.

• extrusive igneous rock

• intrusive igneous rock

• Felsic Igneous Rocks

• Mafic Igneous Rocks

Answer explanation

Mafic igneous rocks are characterized by low silica content and high levels of iron and magnesium, resulting in their dark color. This matches the description provided in the question.

Light-colored rocks that are rich in elements such as aluminum, potassium, silicon, and sodium.

• extrusive igneous rock

• intrusive igneous rock

• Felsic Igneous Rocks

• Mafic Igneous Rocks

Answer explanation

Felsic igneous rocks are light-colored and rich in aluminum, potassium, silicon, and sodium. This composition distinguishes them from mafic rocks, which are darker and contain more iron and magnesium.