Energy release associated with rapid movement on active faults is the cause of most earthquakes. A fault plane is the plane that represents the fracture surface of a fault. A fault trace or fault line is the intersection of a fault plane with the ground surface.
The average IQ of a teenager is 100. IQ tests take age into consideration, so the average score is always 100, regardless of a person's age.
One study looked at the IQ's of teenage subjects during early adolescence and then again four years later. The results revealed that scores varied as much as 20 points over that four-year period.