Exploring Earth's Crust and Mantle

What is the primary composition of the continental crust?

• Basalt

• Granite

• Limestone

• Sandstone

Which type of crust is thicker, and what is its typical thickness range?

• Oceanic crust, 5–10 km

• Continental crust, 30–50 km

• Oceanic crust, 30–50 km

• Continental crust, 5–10 km

What geological feature is formed when tectonic plates shift or get stuck?

• Volcanoes

• Earthquakes

• Mountains

• Valleys

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The type of crust that forms the ocean floor is (a)   .

• Continental crust
• Oceanic crust
• Both continental and oceanic crust
• Neither continental nor oceanic cru

The process when one tectonic plate is forced under another is called (a)   .

• Subduction
• Erosion
• Sedimentation
• Convection

Tags

NGSS.MS-ESS2-3

What is the primary rock type found in the oceanic crust?

• Granite

• Basalt

• Sandstone

• Marble

How does the mantle behave over time despite being made of solid rock?

• It remains completely solid

• It behaves like a thick, slow-flowing fluid

• It becomes gaseous

• It melts completely

What percentage of the Earth's total volume does the mantle make up?

• 50%

• 84%

• 25%

• 10%

What natural phenomenon occurs when molten rock breaks through the Earth's crust?

• Earthquake

• Volcano

• Tsunami

• Landslide

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS3-2

What is the depth of the mantle beneath the Earth's surface?

• 1,000 km

• 2,900 km

• 500 km

• 5,000 km