How is a digital representation of analog data a form of abstraction?

1) earth's crust is made up of relatively rigid plates that ride atop earth's hot, semiliquid mantle. (2) the plates are called tectonic because they're in constant motion. (3) they can move because earth's mantle is a very hot and semiliquid fluid called magma. (4) volcanoes are a result of magma rising up or erupting through a plate, particularly where plate boundaries are moving against each other. (5) also, when plates slide against each other, causing friction along adjacent plate boundaries, earthquakes frequently occur. (6) therefore, we often find volcanoes and earthquakes along plate boundaries. (7) plates may also collide. (8) when that happens, mountain ranges are formed. (9) for example, the collision of the plate carrying the indian subcontinent created the himalayan mountains when it collided with the asian plate. 2. which sentence in this passage introduces a new topic that might begin a new paragraph? a. sentence 5 b. sentence 4 c. sentence 7 d. sentence 6

Stereotypes can influence the way we think about a specific group of people. this is especially common in racial and ethnic group, but it is not reserved specifically for those groups. stereotypes can also apply to school groups, cliques, and neighborhoods. a stereotype is similar to which of the following terms: a)feature detectors b)texture gradient c)perceptual set d)stereogram e)relative clarity

17. a graduated standard used to evaluate student achievement is called a: a. rubric b. norm-referenced test c. criterion-referenced test d. multiple-choice question e. guessing penalty