Question

question 5
magnetic reversals ____.
3 pts
○ cause the movements of tectonic plates
○ confirmed the existence of subduction zones
○ provide strong evidence for seafloor spreading
○ have never occurred during geologic time

Explanation:

Magnetic reversals are changes in Earth's magnetic field direction. Seafloor spreading theory states new oceanic crust forms at mid-ocean ridges and moves away. As magma cools, it records the current magnetic polarity. The resulting symmetric magnetic stripe patterns on either side of mid-ocean ridges match known reversal timelines, strongly supporting seafloor spreading. Tectonic plate movement is caused by mantle convection, not reversals. Reversals don't confirm subduction zones directly, and they have occurred many times geologically.

Answer:

provide strong evidence for seafloor spreading