Describe some different types of data that support the theory of plate tectonics
1. The shapes of many continents look like they are separated pieces of a jig-saw puzzle. For example, look in the adjacent map at the shape of the east coast of North and South Americal relative to the shape of the west coast of Africa and Europe.
2. Many fossil comparisons along the edges of continents that look like they fit together suggest species similarities that would only make sense if the two continents were joined at some point in the past.
3. There is a large amount of seismic, volcanic, and geothermal activity along the conjectured plate boundaries.
4. There are ridges, such as the Mid-Atlantic Ridge where plates are separating that are produced by lava welling up from between the plates as they pull apart. Likewise, there are mountain ranges being formed where plates are pushing against each other (i.e. the Himalayas, which are still growing).