Metamorphic Rocks and Their Properties

Metamorphic rocks form deep beneath the Earth's surface due to heat, pressure, and chemical reactions. As depth increases, so do temperature and pressure, leading to the transformation of igneous and sedimentary rocks into metamorphic rocks. These rocks are classified by texture and composition, with foliated rocks having parallel layers and non-foliated rocks lacking such layers. Common examples include slate, schist, and marble. Understanding the relationship between temperature, depth, and pressure is crucial for comprehending how metamorphic rocks form.

What are the primary factors involved in the formation of metamorphic rocks?

• Wind and water

• Heat, pressure, and chemical reactions

• Erosion and sedimentation

• Freezing and thawing

Which of the following is NOT a factor in the formation of metamorphic rocks?

• Heat

• Pressure

• Chemical reactions

• Wind

As you go deeper into the Earth, what happens to the temperature and pressure?

• Temperature increases, pressure decreases

• Temperature decreases, pressure increases

• Both decrease

• Both increase

At what depths do igneous and sedimentary rocks transform into metamorphic rocks?

• 1 to 5 kilometers

• 30 to 35 kilometers

• 12 to 16 kilometers

• 20 to 25 kilometers

What is the original rock type that transforms into slate under heat and pressure?

• Basalt

• Shale

• Granite

• Limestone

Which of the following is a common metamorphic rock?

• Limestone

• Schist

• Granite

• Sandstone

How are metamorphic rocks classified?

• By their color and size

• By their texture and composition

• By their weight and density

• By their age and location

What does a foliated texture in metamorphic rocks indicate?

• Mineral grains are spherical

• Mineral grains are in a honeycomb pattern

• Mineral grains are randomly arranged

• Mineral grains are lined up in parallel layers or bands

Which rock is an example of a non-foliated metamorphic rock?

• Gneiss

• Marble

• Schist

• Slate

What happens to minerals in non-foliated metamorphic rocks?

• They become transparent

• They dissolve completely

• They grow and rearrange without forming layers

• They form layers