Crash Course- Characteristics of Rocks

What are the two types of crust on Earth?

• Granite crust and basalt crust

• Mantle crust and core crust

• Continental crust and oceanic crust

• Igneous crust and sedimentary crust

What is the main difference between intrusive igneous rock and extrusive igneous rock?

• Intrusive rock is formed by volcanic activity, while extrusive rock is formed by erosion

• Intrusive rock is made of lighter minerals, while extrusive rock is made of heavier minerals

• Intrusive rock forms on the surface, while extrusive rock forms below the Earth's surface

• Intrusive rock forms below the Earth's surface, while extrusive rock forms on the surface

What type of rock is granite?

• Metamorphic rock

• Sedimentary rock

• Extrusive igneous rock

• Intrusive igneous rock

What is the process by which sedimentary rocks are formed?

• Metamorphism and pressure

• Weathering, erosion, and compaction

• Melting and solidification

• Crystallization and recrystallization

What is the main characteristic of metamorphic rocks?

• They have visible grains and tiny holes

• They are formed by volcanic activity

• They are harder and more resistant to weathering

• They are made of cemented particles

What is the process by which rocks go through metamorphism?

• Existing rock recrystallizes without melting

• Rocks are eroded and deposited as sediment

• Magma cools and solidifies into rock

• Sediments are compacted and cemented

What is the texture of intrusive igneous rocks?

• Smooth

• Porous

• Fine-grained

• Coarse-grained

What is the texture of extrusive igneous rocks?

• Fine-grained

• Coarse-grained

• Smooth

• Porous

What is the main factor that determines the texture of igneous rocks?

• The amount of pressure applied

• The rate at which magma cools

• The type of minerals present

• The presence of water

What is the main process that alters rocks on the Earth's surface?

• Weathering and erosion

• Volcanic activity

• Plate tectonics

• Metamorphism