Were all the continents together as a whole at one time?

The came mostly together during the Upper Permian, and remained as Pangea until around the Middle Jurassic.

<<I know continental drift occurred about 4.3 billion years ago, but were all the continents together as one back then?>>

The continents began to form getting on for half-a-billion years later than that, with the very oldest known Earth rocks getting towards four billion years in age. However, they certainly didn't form together as one block. Various amalgamations happened to arise on various occasions for no particular reason, but these occurred much later than that.

Well the single continent was called Pangea. Scientists believe they see much proof in the similarities of the coastlines of the Americas, Europe, Africa. The Appalachian mountains in eastern America and the mountains of western Europe almost appear to be of similar design. Doesn't South America look as if it would fit snuggly into Africa? Do a search on Pangea and you probably learn much more than i can tell you

Do a search on Pangea. You can find info and images of what the 1 continent was supposed to look like. One reason it is surmised that all land on the planet used to be part of 1 continent is that the current continents are like puzzle pieces that if moved back together would fit rather well (given there's been a lot of erosion and land mass changes over the eons).

Look it up...some interesting reading. ☺

Yes and it was called Pangea.

yes it was called pangaea