Galicia PAU Geology and Environmental Sciences Practice Questions - Galicia PAU Geology and Environmental Sciences Geología y Ciencias Ambientales Exam - Galicia PAU Geology and Environmental Sciences Practice Questions - Galicia PAU Geology and Environmental Sciences Geología y Ciencias Ambientales Exam

Question 1

Which seismic wave property explains why S-waves cannot travel through the Earth's outer core?

S-waves are shear transverse waves that require a rigid medium with shear strength to propagate. S-waves travel faster than P-waves and are deflected by the Mohorovičić discontinuity. S-waves are longitudinal compressional waves that undergo total internal reflection at the mantle-core boundary. S-waves suffer extreme thermal attenuation caused by radioactive decay in the lower mantle.

Correct Answer:

S-waves are shear transverse waves that require a rigid medium with shear strength to propagate.

Question 2

What defines the Mohorovičić discontinuity (Moho) in Earth geophysics?

A compositional boundary separating the silicate crust from the denser peridotitic mantle, marked by a sharp increase in P-wave velocity. A thermal boundary between the rigid lithosphere and the ductile asthenosphere where partial melting decreases P-wave velocity. A phase-transition boundary between spinel and perovskite crystal structures within the mantle transition zone. A liquid-solid phase boundary separating the iron-nickel outer core from the solid inner core.

Correct Answer:

A compositional boundary separating the silicate crust from the denser peridotitic mantle, marked by a sharp increase in P-wave velocity.

Question 3

What is the primary driving mechanism of plate tectonics supported by modern geodynamic models?

Mantle thermal convection combined with slab pull at subduction zones and ridge push at mid-ocean ridges. Gravitational tidal forces exerted by the Moon and Sun pulling the oceanic lithosphere westward. Centrifugal forces generated by Earth's axial rotation driving continental drift toward the equator. Convective currents restricted exclusively to the liquid iron-nickel outer core transferring shear stress to the crust.

Correct Answer:

Mantle thermal convection combined with slab pull at subduction zones and ridge push at mid-ocean ridges.

Question 4

During which stage of the Wilson Cycle does continental collision occur, closing an ocean basin and forming mountain belts?

Suture (collision) stage. Embryonic stage. Juvenile stage. Terminal stage.

Correct Answer:

Suture (collision) stage.

Question 5

How do symmetrical magnetic anomaly stripes on the ocean floor support the theory of seafloor spreading?

They record periodic reversals of Earth's magnetic field frozen into basaltic oceanic crust as it crystallizes and spreads from mid-ocean ridges. They indicate that continental rocks periodically gain and lose iron content during intense metamorphic episodes. They demonstrate that solar wind variations induce localized magnetism in marine sedimentary layers near oceanic trenches. They show that Earth's mantle undergoes magnetic polarity inversions every 100 years.

Correct Answer:

They record periodic reversals of Earth's magnetic field frozen into basaltic oceanic crust as it crystallizes and spreads from mid-ocean ridges.

Question 1

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Prepare with the Galicia PAU Geology and Environmental Sciences Practice Questions - Galicia PAU Geology and Environmental Sciences Geología y Ciencias Ambientales Exam practice quiz. This question bank includes 100 questions covering galicia, mineral, rocks, earth, and such. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Galicia PAU Geology and Environmental Sciences Practice Questions - Galicia PAU Geology and Environmental Sciences Geología y Ciencias Ambientales Exam

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Galicia PAU Geology and Environmental Sciences Practice Questions - Galicia PAU Geology and Environmental Sciences Geología y Ciencias Ambientales Exam

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