Metamorphic Rocks and Processes

The video introduces metamorphic rocks, explaining their formation through pressure, temperature, and time. It covers the transformation of sedimentary rocks like sandstone to quartzite and limestone to marble, highlighting the role of calcite crystals. The metamorphism of shale into slate, phyllite, schist, and gneiss is discussed, along with the metamorphism of igneous rocks like basalt. The video also outlines events causing metamorphism, such as subduction zones and proximity to magma. Key concepts include the variables of metamorphism and the irreversible nature of these transformations.

What is the term used to describe rocks that have changed their form?

• Metamorphic rocks

• Sedimentary rocks

• Volcanic rocks

• Igneous rocks

Which of the following is NOT a variable affecting metamorphism?

• Temperature

• Color

• Pressure

• Time

What does sandstone transform into under the right conditions?

• Quartzite

• Slate

• Granite

• Marble

Which rock is formed when limestone undergoes metamorphism?

• Gneiss

• Quartzite

• Slate

• Marble

What is the primary mineral found in both limestone and marble?

• Calcite

• Feldspar

• Quartz

• Mica

What is the first rock that shale transforms into during metamorphism?

• Slate

• Phyllite

• Schist

• Gneiss

Which rock can basalt transform into under metamorphic conditions?

• Marble

• Quartzite

• Schist

• Gneiss

Which event is NOT a cause of metamorphism?

• Being buried deep below other rocks

• Being inside a growing mountain

• Being exposed to sunlight

• Being near hot magma or lava

What happens to a rock once it undergoes metamorphism?

• It can revert back to its original form

• It remains in its new form permanently

• It becomes a liquid

• It turns into a gas

Which of the following is an example of a subduction zone?

• A mountain range

• A tectonic plate sliding under another

• A volcanic eruption

• A river delta