Continental drift/ Sea floor Spreading

Great!Continental drift- The gradual movement of the continents across the earth’s surface over time.
1.) Fossils- The same fossils where found on separate continents, but the animal only lived in fresh water and couldn't fly so the continents had to be close at one time.

2.) Glacier- The glacier striations look the same on South America and Africa which supports the theory of them once being one continent.
3.) Puzzle Pieces- South America and Africa look like they where once one.
4.) Mountains- The mountains on separate continents look the same and are made of almost the same rock.
Great!Sea floor Spreading- A process that occurs at mid- ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
1.) Age- when new acetic crust is formed the age of the crust around it is older.
2.) Magnetic reversal- A switch in the direction of Earth's magnetic field so that the magnetic north pole becomes the magnetic south pole and the magnetic south pole becomes the magnetic north pole.