6th Grade Unit 3 Practice Earth's Layers and Plate Tectonics

Which layer of the Earth is primarily responsible for the generation of Earth's magnetic field?

• Crust

• Mantle

• Outer Core

• Inner Core

Which of the following is true about the density of Earth's layers?

• Density decreases with depth.

• Density increases with depth.

• Density remains constant throughout.

• Only the crust has variable density.

How do seismic waves provide evidence about Earth's interior structure?

• They slow down in denser materials.

• They cannot travel through the mantle.

• P-waves travel through solids and liquids, while S-waves cannot travel through liquids.

• Both P-waves and S-waves increase speed in the outer core.

Tags

NGSS.HS-ESS2-3

Why does the crust "float" on the mantle?

• The crust is denser than the mantle.

• The crust is less dense than the mantle.

• The mantle is a rigid solid.

• The mantle is a liquid.

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NGSS.MS-PS2-4

What causes the physical and chemical differences between Earth's layers?

• Gravitational settling of materials by density.

• Tectonic activity.

• Solar radiation.

• Erosion over time.

What evidence did Alfred Wegener use to support his theory of continental drift?

• Fossil records, rock formations, and climate data.

• Seismic activity and magnetic reversals.

• Volcanic activity and mountain ranges.

• Satellite imagery and GPS data.

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

Which of the following is a criticism Wegener faced about continental drift during his time?

• Lack of evidence for similar fossils.

• Lack of evidence for magnetic reversals.

• Lack of evidence for volcanic activity.

• Lack of evidence for tectonic plates.

Tags

NGSS.HS-ESS1-5

What does the presence of Mesosaurus fossils on separate continents suggest?

• Mesosaurus was capable of long-distance swimming.

• The continents were once connected.

• Mesosaurus adapted to diverse environments.

• Plate tectonics created similar fossil patterns.

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

Which statement best describes Pangea?

• The current configuration of continents.

• A supercontinent that existed 200 million years ago.

• A region of subduction zones.

• The area of high tectonic activity today.

Tags

NGSS.MS-ESS2-3

How does continental drift differ from plate tectonics?

• Continental drift refers to mountain building, while plate tectonics explains volcanism.

• Plate tectonics provides the mechanism for continental drift.

• Plate tectonics applies only to oceanic plates.

• Continental drift occurs at faster rates than plate tectonics.

Tags

NGSS.HS-ESS1-5