Geography - 18. What Are Rocks and How Do They Form?

What is the Earth's solid exterior made of?

• Air

• Water

• Rocks

• Sand

What is the first and lightest shell of the Earth?

• Atmosphere

• Mantle

• Core

• Crust

Which type of crust makes up the major landmasses on Earth?

• Oceanic crust

• Mantle

• Core

• Continental crust

What type of rock is granite?

• Metamorphic

• Igneous

• Sedimentary

• Volcanic

What is the process of rocks being broken down by the Earth's atmosphere, water, and living things called?

• Weathering

• Metamorphism

• Erosion

• Crystallization

Which type of rock is formed when organic matter accumulates and compacts in swampy environments over millions of years?

• Granite

• Basalt

• Coal

• Sandstone

What causes existing rock to go through metamorphism and change into a completely new rock type?

• Weathering

• Pressure

• Erosion

• Melting

What is the texture of intrusive rocks like granite due to slow cooling?

• Coarse-grained

• Porous

• Fine-grained

• Smooth

Which type of rock is rich in light-colored, lighter weight minerals like silicon and aluminum?

• Felsic

• Mafic

• Ultramafic

• Intermediate

What is the outer core of the Earth made of?

• Magnesium Compounds

• Quartz

• Silicates

• Iron and Nickel