Quick Answer. When a solid turns into a liquid it is called fusion, more commonly referred to as melting. When a material moves from one state of matter into another it is called a phase transition. Fusion is just one of approximately different states that matter can phase through.
Before the dinosaurs, there were Triops. Fossil Triops more than 200 million years old have been discovered. By comparison, dinosaurs date back only about 60 million years...just 'youngsters' in terms of geologic time. Triops are distant relatives of trilobites. Triops means three-eyes while the name trilobite means three lobed or three segments.
The Saurischia (lizard-hipped): the termcomes from sauria, meaning reptile, and ischia, referring to the ischium bone of the pelvis. These dinosaurs had a pelvis built like that of many other reptiles, hence the name lizard-hipped dinosaurs.From them evolved the other major group of dinosaurs.he only living anapsids are the turtles and tortoises (see figure below). The synapsids: or mammal-like reptiles have a single temporal opening low on the side of the skull, beneath the postorbital and squamosal bones. They are extinct but very important because mammals evolved from this group of reptiles.