Continental Drift/ Sea-Floor Spreading

Continental drift-Explain it. Continental drift is the theory that once the continents were once all one and drifted the places where they are now. 

This is well written!

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

1.  Fossils were proved because they found the same types of fossils that were in totally different areas, so at one time they could only could of to been connected to be in different areas. 

2. Glacial Striations are found in Africa, so at one time Africa was in towards that Arctic area. 

3. Geological features are also found in the mountains of the U.S. and in Russia. Scientists studied the minerals and found that they are made with the same types of minerals. 

4. Puzzle-The last one is if you look at a map the east side of South America and the west side of Africa seem like they could have at one time fit together like a puzzle.

Seafloor Spreading-Explain it.

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

1. Age-The first one is that the crust breaks open in some cracks and the magma comes through and cools off causing the magma form into rock and makes the floor spread. They found this my radiometric dating. 

2. Magnetic Reversals-They found that the rock farther away from the center the older. Another way was magnetic reversals.