Seismology and Earth's Layers Quizizz

What are the three main layers of the Earth as determined by geologists?

• Crust, mantle, and core

• Lithosphere, asthenosphere, and mesosphere

• Outer core, inner core, and mantle

• Crust, ocean, and atmosphere

Which of the following provides direct physical samples of Earth's upper mantle?

• C1 chondrites

• Seismic waves

• Xenoliths and ophiolites

• Nuclear explosions

What are the two main categories of seismic waves that travel through the Earth?

• Love waves and Rayleigh waves

• P-waves and S-waves

• Surface waves and Body waves

• Primary waves and Secondary waves

Which type of body wave is compressional and travels faster through Earth's interior?

• S-waves

• Love waves

• P-waves

• Rayleigh waves

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What causes the S-wave shadow zone?

• Refraction of S-waves at the core-mantle boundary.

• S-waves being dissipated at the outer core.

• S-waves traveling through the mantle to the other side of Earth.

• A dramatic increase in density at the core-mantle boundary.

What is the Mohorovičić discontinuity (Moho)?

• A zone where seismic velocities decrease significantly.

• The boundary between the lithosphere and asthenosphere.

• The boundary between the crust and mantle, characterized by a sudden increase in seismic wave velocities.

• A layer within the asthenosphere where olivine changes its crystal structure.

Which characteristic describes the low-velocity zone?

• It is found at the core-mantle boundary.

• It is a region where seismic velocities suddenly increase.

• It marks the transition from strong/brittle rocks to weak/ductile rocks.

• It is primarily composed of solid, rigid rock.

What is a characteristic of the Ultra Low Velocity Zone (ULVZ)?

• It is a region of extremely high seismic velocities.

• It is found at the top of the mesosphere.

• It is characterized by extremely low seismic velocities and may initiate mantle superplumes.

• It is primarily found in areas with recent subduction.