Breana Rocha's Science Project

On Plate Tectonics Continental Drift and Seafloor Spreading.

Seafloor Spreading

The theory of seafloor spreading was that hot less dense materials rise toward the surface of the ocean (magma) and then it creates the ridges mountains or volcano. The new magma pushes the seafloor sideways.


Seafloor Spreading

The Mid-Ocean Ridge is a evidence that seafloor spreading may be true because a

t the mid ocean ridge magma is pushed through the surface of the oceanic crust and makes rocks, the younger rocks are closer to the middle and older rocks are farther away which can expand the sea floor.

I think that the theory of seafloor spreading is true because there is evidence that scientist have proved the theory correct.

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Continental Drift

Alfred Wegener had the theory that the continents were once together and that over time they drifted apart

Continental Drift


The fossils of mesosaurus was found in Africa and south america. this swimming reptile lived in fresh water and on land. Which means it was impossible for them to swim in salt water from south america to Africa


I think that the evidence for this theory is valid and that i believe that continental drift is possible.

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Plate Tectonics

the theory that the lithosphere is broken up into many pieces called plates

Plate Tectonics

Evidence was found that the plates have boundaries theses boundaries where called,

convergent-go toward each other

divergent -go away from each other

transform- slide past each other

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I think the theory of tectonic plates is valid because every day there is earthquakes and volcanoes and other things that can only be explained by the movement of the plates.