Plate Techtonics
By Shawn Flanery
PLATE TECHTONICS
A thin layer of material that shifts. plate tectonics are huge rocks that float on a mixture of rock and magma.
invalid i need more evidence of plate techtonics
CONTINENTAL DRIFT
Similar rocks from landmarks on other continents.
Glacier carved hole in tropical climate area's.https://docs.google.com/a/cbcsd.org/presentation/d/17nno5DdGRQamq6SjAqmkOdpuu4s6FCYW-QeDWX9E-Rc/edit#slide=id.gb1a176dc_035
Valid because if you look at the world it will piece together
SEA FLOOR SPREADING
Hess’s theory that magma under Earth’s crust is forced up toward the surface at the mid-ocean ridge comes from.
magma pushes up through the oceanic crust and turns in
to rock.https://docs.google.com/a/cbcsd.org/document/d/1JAIQhdPptybdFriDYlAdFdW2kFlWvOyBmJjV_83JM_c/editvalid because there is proof of new and old rocks