The short answer: 20 (composite score) is the national ACT average. About half of students score above that, and half of students score below. The top 25% of ACT takers score about 24 or more, so if your score is above 24, that's excellent.
1 SavinâNorov machine gun. 2  Space Network, a NASA relay satellite system. 3  Sthene, an obsolete unit of force or thrust in the metre-tonne-second system of units. 4  Substantia nigra, a brain structure. 5  Supernova, a stellar explosion, in astronomy and cosmology.  Tin, a metallic element with chemical symbol Sn.
The somatic nervous system (SNS) is made up of nerves that are connected to skin, muscles and sensory organs (the eyes, ears, nose, skin, etc.). This system enables our voluntary control of muscles, as well as our reception of sights, sounds, sensations, tastes and smells.