atrial fibrillation. n. Abbr. AF. Fibrillation in which the normal rhythmical contractions of the cardiac atria are replaced by rapid irregular twitchings of the muscular wall that cause the ventricles to respond irregularly. Also called a-fib, auricular fibrillation.
continental=on land. here is a good example of plate tectonics, i just had to explain all that stuff. Subduction is when converging plates come together. they make a trench by one plate sliding under the other and into the mantle.
Answers: 1. Plate: a piece of the crust. 2. Theory of Plate Tectonics-theory that explains the formation/movement of the Earthâs crust. 3. Lithosphere: outermost solid part of the crust.solid, pieces, basalt, more dense, float 4. Asthenosphere-the partially melted part of the mantle that contains convection currents that move the crustal plates.5.. Theory of Plate Tectonics-theory that explains the formation/movement of the Earthâs crust. 3. Lithosphere: outermost solid part of the crust.