Mexico is a part of North America [1]. What is less obvious is whether Guatemala, Belize, Nicaragua, etc, would fall into N or S America. Central America is a region, like the Middle East, but is not its own continent. Central America is a part of North America [2]. Nathan made a good point that the United Nations considers Mexico a part of Central America [3]. I wonder why [4].
Sear each side, flipping minimally. It should not take long for a crisp brown crust to form. Depending on the heat of your pan, it should take about 2-4 minutes (or less) for each side to finish cooking. When the first side is done, flip your steak and cook the second side for about as long.
You can sear the steak on high heat, but move the meat to a cooler part of the grill to finish it. If using a gas grill, turn the heat on high for preheating, and then turn it down to medium a minute before putting the meat on. By the time the meat is seared, the temperature will adjust. Use a timer or your watch. Grill four to six minutes on one side. Flip the steak, and cook for another four to six minutes on the other side. The length of cooking time will vary according to how thick your steak is and how well-done you want it. Steak must be cooked to at least 145 degrees in order to be eaten safely.