What evidence supports Hess’s theory of seafloor spreading? Check all that apply.

Iron-bearing minerals in ocean rocks record the direction of Earth’s magnetic field as the rocks form, creating magnetic patterns that support seafloor spreading. Rock samples also show that the seafloor is youngest near mid-ocean ridges and gets older farther away. Pillow-shaped rocks form when lava cools underwater, providing evidence of volcanic activity on the seafloor.

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