Dariel CedanoGeophysical ScienceMr. Rozman1/23/18The earth is beautiful but it’s constantly moving, shifting, and causing many earthquakes as a matter a fact it’s moving right now.
This is all being caused by theory of plate tectonic. The theory is that Earth’s outer shell is divided into several plates that glide over the mantle. Evidence of this is is sea floor spreading, Subduction zones and trenches, and age of rocks at mid ocean ridge.The first piece of evidence is Subduction zones and trenches. The Subduction zones and trenches slowly moves away from the ridge. The ocean floor sinks into the deep underwater canyons that are called deep-ocean trenches. Subduction changes the size and shape of the oceans.
Millions of years pass and only a part of the ocean floor sinks back into the mantle at deep-ocean trenches. It takes a lot of time for new rock to form at the mid-ocean ridge, move across the ocean, and sink into a trench. Subduction zones and trenches helps explain continental drift in the theory of plate tectonics.
The second piece of evidence is seafloor spreading. Seafloor spreading, similar to Subduction zones. Seafloor spreading occurs when new oceanic crust is formed through volcanic activity. A similarity of seafloor spreading and subduction zones is that both occurs at the mid-ocean ridges. Seafloor spreading helps explain continental drift in the theory of plate tectonics.
My final piece of evidence is about Age of rocks. Like my other evidence this takes place at the mid ocean ridge. The seafloor rocks form in the middle of the ridge is found on the edges of the south american plates and african plates.
This proves that these two continents were once the same. The were were once a supercontinent called Pangea but was was separated into two different continents.The three pieces of evidence, seafloor spreading, subduction zones and trenches, and age of rocks explain the plate tectonics. All three of pieces of evidence shows that a lot happen at the mid ocean ridge. It all show that the tectonic plates are the cause of earthquakes and more.
This proves the theory and shows how the world came to be.The world is beautiful and It’s a result of the tectonic plates.