6. how does the shape and size of the continents today support the theory of continental drift?

All the continents were connected in one large landmass.If you take a map and cut out all the Continent, you can see that they fit together almost perfectly, like a giant puzzle. This idea supports the fact that all the continents were connected in one large landmass.
hope it helped :)

The theory of Continental Drift is a theory which earth used to have one giant landmass called Pangea. 

The shape and size of today's continents all look like they fit together like a puzzle. The edges look somewhat like they would fit together. If you cut out all continents and pieced them together into one giant landmass it would look nearly perfect. This is why today's continents support the theory of Continental Drift

Hope this helped. Have a great day!

Shania is trying to determine the oldest geologic unit on this map and the reason to why is she unable to do so is that  the units are all the same age.. when there is the same age, there will be no oldest geologic unit and that i cannot be credible.