SOLAR SYSTEM

Detailed explanation-1: -Scientists discovered that the rock that makes up the ocean floor lies in a pattern of magnetized “stripes.” These stripes hold a record of reversals in Earth’s magnetic field.

Detailed explanation-2: -When the Earth’s magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic patterns led to recognition of the occurrence of sea-floor spreading, and they remain some of the strongest evidence for the theory of plate tectonics.

Detailed explanation-3: -The ultimate proof of this was the discovery of “magnetic stripes” on the seafloor later in the 1960s: the magnetic domains in oceanic rocks recorded reversal of Earth’s magnetic field over time.

Detailed explanation-4: -When Earth’s geomagnetic field undergoes a reversal, the change in polarity is recorded in the magma. Over time, this contributes to the alternating pattern of magnetic striping observed on the ocean’s floors.

Detailed explanation-5: -The seafloor is made of volcanic rock that solidified from magma and/or lava. In the box above the grid, draw a Geomagnetic Reversal Timescale from the data plotted on the grid.

Detailed explanation-6: -Scientists found that magnetic polarity in the seafloor was normal at mid-ocean ridges but reversed in symmetrical patterns away from the ridge center. This normal and reversed pattern continues across the seafloor.