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Eighth Grade (Grade 8) Tectonics Questions

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Grade 8 Tectonics
A deep-ocean trench is shown on the diagram at I.
Subduction Zone
Oceanic crust rock samples are collected at I and J. Which relative ages of the rock samples would provide evidence that the seafloor is spreading mid-ocean and being recycled at the trench?
  1. Sample J is older than Sample I.
  2. Sample I is older than Sample J.
  3. Sample I and Sample J are the same age and old.
  4. Sample I and Sample J are the same age and young.
Grade 8 Tectonics
Grade 8 Tectonics
Grade 8 Tectonics
Which wave arrives first to the seismic station?
  1. P-Primary
  2. S-Secondary
  3. Surface
  4. Mercalli
Grade 8 Tectonics
Grade 8 Tectonics
Which kind of waves cannot travel through a liquid?
  1. p-waves
  2. s-waves
  3. surface waves
  4. x-rays
Grade 8 Tectonics
S waves are most easily blocked by Earth's                .
  1. asthenosphere
  2. lithosphere
  3. inner core
  4. outer core
Grade 8 Tectonics
Which wave can only go through solids?
  1. P-Primary
  2. S-Secondary
  3. Surface
  4. Normal
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