Exploring Earth's Layers

What is the outermost layer of the Earth called?

• mantle

• core

• atmosphere

• crust

What is the main material that makes up the Earth's crust?

• Igneous rocks

• Metamorphic rocks

• Sedimentary layers

• Silicate minerals

How thick is the Earth's crust on average?

• 30 kilometers

• 50 kilometers

• 20 kilometers

• 15 kilometers

What is the temperature of the inner core?

• 3,000 to 4,000 degrees Celsius

• 6,000 to 7,000 degrees Celsius

• 4,000 to 5,000 degrees Celsius

• 1,000 to 2,000 degrees Celsius

What is the inner core primarily made of?

• Lead and zinc

• Silicon and magnesium

• Aluminum and copper

• Iron and nickel

What is the process called that moves the Earth's plates?

• Continental drift

• Plate tectonics

• Oceanic circulation

• Magnetic reversal

What are tectonic plates?

• Tectonic plates are small rocks found on the ocean floor.

• Tectonic plates are clouds that form in the atmosphere.

• Tectonic plates are large sections of the Earth's lithosphere that move and interact with each other.

• Tectonic plates are layers of water that cover the Earth.

What happens when tectonic plates collide?

• Colliding tectonic plates create flat plains and deserts.

• Tectonic plates only cause tsunamis when they collide.

• Tectonic plates do not affect the Earth's surface when they collide.

• Tectonic plates can create mountains, earthquakes, and volcanic activity when they collide.

What is the name of the boundary where two plates meet?

• Tectonic seam

• Plate interface

• Boundary layer

• Plate boundary

What is one effect of plate tectonics on the Earth's surface?

• Formation of large bodies of water and rivers.

• Formation of mountains and earthquakes.

• Increased volcanic activity leading to fewer landforms.

• Stabilization of the Earth's crust with no geological changes.