The stripes on the paper represent magnetic stripes on the ocean floor. These stripes show patterns of Earth's magnetic field reversals recorded in the rocks as new seafloor forms and spreads.The middle slit represents the mid-ocean ridge, where seafloor spreading occurs. At this ridge, magma rises from below the Earth's crust, creating new oceanic crust as the plates move apart.The mid-ocean ridge is the zone where lithospheric plates move apart. It acts as a boundary where new crust forms and pushes the plates away from each other.New seafloor forms at the mid-ocean ridge when magma rises from the mantle, cools, and solidifies, creating new oceanic crust.At the side slits (transform faults or fracture zones), the plates slide past each other horizontally. This process is called strike-slip movement and helps accommodate the spreading of the seafloor.No, the Earth is not getting larger. While plates move apart at mid-ocean ridges, new crust forms, but old crust is destroyed at subduction zones (where plates collide). This keeps the Earth's size balanced.