Question

question 9 (1 point)
the alternating reversals of earths magnetic field throughout history have been recorded in seafloor rocks in a particular pattern and chronology. how does this support plate tectonics?
the pattern of alternating reversals indicates that the sea level has risen due to plate subduction.
the pattern of alternating reversals indicates that the seafloor is static, so there must be another mechanisms for plate movement.
the pattern of alternating reversals indicates seafloor spreading and, as a result, continental drift.
this does not support plate tectonics.

Explanation:

Seafloor spreading is a key concept in plate tectonics. When new oceanic crust is formed at mid - ocean ridges, the magnetic minerals in the cooling magma align with the Earth's magnetic field at that time. As the Earth's magnetic field reverses over time, the pattern of these magnetic reversals in the seafloor rocks shows that the seafloor is spreading, which is a driving force behind continental drift and supports the theory of plate tectonics.

Answer:

C. The pattern of alternating reversals indicates seafloor spreading and, as a result, continental drift.