Metamorphic Rock

What can extreme heat and pressure do to rocks?

• Create fossils

• Melt rocks completely

• Change one type of rock into another

• Have no effect on rocks

Answer explanation

Extreme heat and pressure can change one type of rock into another through the process of metamorphism.

Tags

NGSS.MS-ESS2-2

Hey there, rock enthusiasts! Ms. Urbanak, Ms. Kim, and Mr. Parr are debating a fun geology puzzle: Into what type of rock can granite transform under extreme heat and pressure?

• Sandstone

• Limestone

• Gneiss

• Basalt

Answer explanation

Under extreme heat and pressure, granite can transform into gneiss, making it the correct choice.

Tags

NGSS.MS-ESS2-2

Mr. Manfra and Mr. Alaimo are debating about rocks in their gym class. They stumbled upon gneiss. Can you help them figure out what type of rock gneiss is?

• Igneous

• Metamorphic

• Sedimentary

• Crystal

Answer explanation

Gneiss is a type of metamorphic rock, not igneous or sedimentary. It forms from the metamorphism of existing rocks, resulting in distinct banding and foliation.

What is the classification of Gneiss based on the arrangement of grains in metamorphic rocks?

• Non-Foliated

• Foliated

• Sedimentary

• Igneous

Answer explanation

Gneiss is classified as Foliated based on the arrangement of grains in metamorphic rocks.

Mrs. Manfa and Ms. Marte curious: What unique feature distinguishes a foliated metamorphic rock?

• The rock is very hard and unbreakable

• The rock contains fossils

• The rock is arranged in parallel layers

• The rock is always black in color

Answer explanation

The characteristic feature that defines a foliated metamorphic rock is that the rock is arranged in parallel layers.

Imagine Brayden, Chase, and Sebastain are geologists exploring a rocky terrain. They notice foliated metamorphic rocks. What can happen to these rocks along their bands?

• They can glow

• They can expand indefinitely

• They can break

• They can become transparent

Answer explanation

They can break

Hey Lira, Ella, and Aliyah! Can you figure out what's a key characteristic of non-foliated metamorphic rocks?

• They split into layers easily.

• They are arranged randomly and do not split into layers.

• They are primarily composed of quartz.

• They are softer than foliated rocks.

Answer explanation

They are arranged randomly and do not split into layers.

Which process is primarily responsible for the formation of metamorphic rocks?

• Weathering and erosion

• Deposition of sediments

• High pressure and temperature

• Organic decomposition

Answer explanation

High pressure and temperature are primarily responsible for the formation of metamorphic rocks.