The ocean floor has a huge mountain range because when the tectonic plates separate, magma spews out. The topography of the sea floor comes from the tectonic plates shifting, causing them to spew out magma. The magma then cools down, allowing a young crust to form along the mid-ocean ridges. The newest, thinnest crust on Earth is located near the center of the mid-ocean ridge; the actual site of seafloor spreading. The age, density, and thickness of the oceanic crust increase with distance from the mid-ocean ridge. Abundant evidence supports the central contentions of the seafloor-spreading theory. First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge approaches, and the sediment cover is thinner near the ridge. Magma spewing from the seperated seafloor and cooling, creating another layer of crust also backs this idea. Along seafloor spreading zones, the continents are separating from one another. As they spread apart, magma comes to the surface and becomes a new continental crust. As the tectonic plates move away from spreading zones, they collide with one another. The ocean floor has a huge mountain range because when the tectonic plates separate, magma spews out. We know this because when the magma spews, the ocean cools the magma, forming the mountain ranges in the mid-atlantic range. So...

The evidence I collected supports my claim because…?