Seafloor Spreading Worksheet
Explore the concept of seafloor spreading, a fundamental process in plate tectonics, with this comprehensive worksheet.
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Seafloor Spreading Worksheet
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Date:
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Read each question carefully and answer to the best of your ability. Refer to your notes and textbook if needed.
1. What is the primary driving force behind seafloor spreading?
Gravitational pull of the moon
Convection currents in the mantle
Ocean currents
Earth's rotation
2. Where does new oceanic crust form?
Oceanic trenches
Subduction zones
Mid-ocean ridges
Continental shelves
3. Seafloor spreading occurs at boundaries.
4. The process of seafloor spreading pushes older oceanic crust away from the .
5. As new crust forms, magnetic stripes on the seafloor record the Earth's changing .
6. The oldest oceanic crust is found closest to the mid-ocean ridge.
True
False
7. Seafloor spreading causes continents to move further apart over geological time.
True
False
8. Describe the role of magma in seafloor spreading.
9. Observe the diagram below, which illustrates seafloor spreading. Label the mid-ocean ridge, new crust, and older crust.
A:
B:
C:
10. Explain how the discovery of magnetic stripes on the seafloor provided strong evidence for the theory of seafloor spreading.
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