That is, they thought that if you traveled far enough in one direction, you would eventually come to the edge of the world. Then about two thousand years ago, people started to come up with the theory that the earth was round. This meant that by traveling far enough in a straight line, you would eventually come back to where you started.It wasn’t until the 16th century that Ferdinand Magellan’s expedition became the first to travel around the world. The expedition first sailed west from Portugal, around South America, across the Pacific, before returning around South Africa back to Portugal.What does the theory that the earth is round imply if traveling straight far enough?A You would return to where you ended.B You would return to where you started.C You would come to the edge of the world.

For most of human history, people thought the world was flat. That is, they thought that if you traveled far enough in one direction, you would eventually come to the edge of the world. Then about two thousand years ago, people started to come up with the theory that the earth was round. This meant that by traveling far enough in a straight line, you would eventually come back to where you started. It wasn’t until the 16th century that Ferdinand Magellan’s expedition became the first to travel around the world. The expedition first sailed west from Portugal, around South America, across the Pacific, before returning around South Africa back to Portugal. What does the theory that the earth is round imply if traveling straight far enough? A You would return to where you ended. B You would return to where you started. C You would come to the edge of the world.