Seafloor Spreading Worksheet
Explore the process of seafloor spreading, magnetic striping, and the age of the ocean floor with this Grade 7 science worksheet.
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Seafloor Spreading: Uncovering Earth's Dynamics
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Read each question carefully and answer to the best of your ability. Use complete sentences for short answer questions.
1. What is the process called when new ocean crust is formed at mid-ocean ridges and old crust is pulled back into the mantle at deep-ocean trenches?
Continental Drift
Seafloor Spreading
Subduction
Plate Tectonics
2. Where would you find the youngest rock on the ocean floor?
Near deep-ocean trenches
At mid-ocean ridges
Close to continents
In abyssal plains
3. The continuous movement of magma from the mantle to the Earth's surface creating new crust is called .
4. The process of seafloor spreading helps explain why the continents over time.
5. The pattern of magnetic stripes on the ocean floor provides evidence for .
6. Describe the role of the mid-ocean ridge in seafloor spreading.
7. Explain how the age of the ocean floor supports the theory of seafloor spreading.
8. Seafloor spreading occurs at deep-ocean trenches.
True
False
9. Magnetic stripes on the ocean floor show reversals of Earth's magnetic field.
True
False
10. Observe the diagram of seafloor spreading below. Label the Mid-Ocean Ridge and a Deep-Ocean Trench.
Label A:
Label B: