Plate Project
By Josue Lopez
Continental Drift
The theory of continental drift
Continental Drift is the theory that all the continents were once together 200 million years ago.
Up above is a picture of what all the continents connected or called pangaea
Evidence
There are evidence that Freshwater fish have been found on two different continents that are separated by salt water. There is also another fact that there are warm climate plants in cold climate areas
To believe or not?
I believe the theory of Continental drift because of the evidence presented
Seafloor spreading
Up above is a picture of seafloor spreading
What is seafloor spreading?
Seafloor spreading is where the oceanic crust moves toward the continental crust but doesn't move the continents or the continental crust instead it goes under and recycles into magma.
Evidence
Two examples to help explain is there is young rocks at the middle of oceanic ridges and old rocks that are farther to the oceanic ridges. another clue is that magnetic rocks along the ocean floor show magnetic reversals as it moves away from the middle. These clues help explain Seafloor spreading
To Believe or not?
Yes I believe because this theory explains how volcanoes are made
Plate tectonics
Theory
The theory is a combination of Continental drift and seafloor spreading.
According to the theory of plate tectonics Earth crust and part of the upper mantle are broken up. The peices broken up are called plates and move on a plastic like layer of the mantle
up above is how the theory looks
Boundaries
Convergent-move together
When the plates continental plates and another continental plate move together it causes mountains or volcanoes
When two oceanic plates move together one will subduct and make a trench
Divergent-Go away from each other
When Oceanic and oceanic move away they created new seafloor, volcanoes, ridges, and seafloor spreading
Transform- slide past each other
When this happens it makes earthquakes and tsunamis
To Believe or not to believe?
I believe this because it explains how the land forms are formed