1. observe this diagram of a plate boundary. one statement best describes what is happening. it is that a) the oceanic crust is melting. b) volcanic islands are forming. c) this is typical of a subduction zone. d) the tectonic plates are moving away from each other.

The answer is; C

As can be observed in the diagram, the oceanic plate of the crust is being subducted by the continental plate. This is typical of a subduction zone where two tectonic plates, moving in opposite directions, collide. The heavier plate (usually the oceanic plate due to its ‘wetness’) sinks below the lighter plate (usually the continental plate). An example of a subduction zone is the famous ‘ring of fire’ region in the Pacific.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2