How Do Magnetic Properties of Seafloor Rocks Support the Theory

question 28

Multiple Choice

How do magnetic properties of seafloor rocks support the theory of plate tectonics?

• A)As they cool, the rocks record reversals of magnetic north.
• B)The magnetic properties of the rocks indicate where the seafloor is thickest and therefore oldest.
• C)The magnetic field changed the chemical composition of the rocks through time, revealing plate movement.
• D)The magnetized rocks first revealed where mid-ocean ridges were.

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