Continental drift/ Seafloor spreading

Continental drift-Explain it.
Continental Drift mean "all land".Continents have slowed moved to their cur what? 


Identify 4 evidences the helped prove the continents where moving and explain each one. Very good

1.  Oil and Coal: separated they started in the same spot 
2. Fossils: All of the organisms were all together then got separated 
3. Glaciers: They left glacial striations 
4. Rock Formation: geological structures 

Seafloor Spreading-Explain it.

Hess’s theory that new sea floor is formed when magma is forced upward toward the surface at a mid- ocean ridge. Very good

Identify 2 evidences that helped prove the sea floor was growing and explain each one.

1. Magnetic Reversals: the metal particles in the lava pointed toward the polarity at that time.

2. Radiometric Dating: researchers took rock samples and aged them.