Metamorphic Rocks and Their Properties

The video tutorial by Kate O'Donnell explains metamorphic rocks, the densest rocks on Earth, formed deep underground through intense heat and pressure. It covers the role of Earth's crust and mantle in rock formation, the impact of tectonic plates, and the transformation of minerals. The video distinguishes between foliated and non-foliated metamorphic rocks and discusses their place in the rock cycle, including their potential to become magma or sedimentary rocks.

What are metamorphic rocks primarily formed from?

• Only igneous rocks

• Volcanic ash

• Sedimentary and igneous rocks

• Only sedimentary rocks

What is the temperature of the Earth's mantle?

• 7000 degrees Celsius

• 100 degrees Celsius

• 900 degrees Celsius

• 500 degrees Celsius

Where do metamorphic rocks commonly form?

• On mountain tops

• On the ocean floor

• At tectonic plate boundaries

• In the atmosphere

What happens to minerals in rocks under intense pressure?

• They evaporate

• They dissolve

• They form smaller crystals

• They transform into larger crystals

What type of metamorphic rock forms when pressure is uniform from all directions?

• Sedimentary

• Igneous

• Non-foliated

• Foliated

Which rock transforms into marble under pressure?

• Limestone

• Sandstone

• Granite

• Shale

What is the primary factor that causes foliated metamorphic rocks to form?

• Pressure from one direction

• Uniform pressure from all directions

• High temperature

• Low temperature

What is the result when metamorphic rock is pushed too close to the mantle?

• It becomes sedimentary rock

• It remains unchanged

• It melts into magma

• It turns into a gas

What process turns weathered metamorphic rock into sedimentary rock?

• Weathering

• Erosion

• Melting

• Freezing

What is the rock cycle?

• A method of mining rocks

• A process of rock formation and destruction

• A type of metamorphic rock

• A cycle of weather patterns