hiccup hicÂ·cup or hicÂ·cough (hÄ­k'Ép) n. A spasm of the diaphragm causing sudden inhalation interrupted by spasmodic closure of the glottis, producing a characteristic noise.
Ancient Convergent Plate Boundary-Appalachian Mountain Range. The range is mostly located in the United States but extends into southeastern Canada, forming a zone from 100 to 300 mi (160 to 480 km) wide, running from the island of Newfoundland 1,500 mi (2,400 km) southwestward to Central Alabama in the United States.
Earth's outer layer, the crust, is divided into a set of large moving plates. The lines where they meet are called plate boundaries. There are three main types of plate boundary: divergent, convergent and transform.Plates move away from one another at divergent boundaries. This happens at mid-ocean ridges. Plates move towards one another at convergent boundaries; one plate is forced below another in a process called subduction.Earthquakes and composite volcanoes are common at this type of boundary. Plates move past on another at transform boundaries.arth's outer layer, the crust, is divided into a set of large moving plates. The lines where they meet are called plate boundaries. There are three main types of plate boundary: divergent, convergent and transform.