42. The Earth’s crust is subdivided into two regions, namely the continental crust and the oceanic crust. Which of the

following describe the crust?

I. It is made of a variety of rocks

II. Its thickness ranges from 10 t0 100 km

III. It has an average density of 2.8 g/cm³

a. I and II

b. I and III

c. II and III

d. I, II and III

43. In a hot spot, Volcano A is on top of the mantle plume, Volcano B is 10 km farther from A, while

Volcano C is the farthest. What can you infer about the ages of the volcanoes?

a. Volcano A is older than C. b. Volcano B is the youngest

c. Volcano B is the oldest d. Volcano B is younger than C.

44. Decide what geologic features or events could result out of this plate boundary. Study the figure.

a. Volcanoes, mountains, rift valleys, earthquakes

b. Mountains, volcanoes, trenches, earthquakes

c. Trenches, rift valleys, oceanic ridges, earthquakes

d. Rift valleys, mountains, volcanoes, earthquakes

45. You were asked to locate the epicenter of a recent earthquake. Select the correct sequence of events

you should follow?

I. Determine the difference in the arrival time of S and P waves recorded

from each of the seismological stations.

II. Use the triangulation method to locate the epicenter.

III. Obtain data from three different seismological stations.

IV. Determine the distance of the epicenter from the station.

a. I, III, II, IV b. III, IV, I, II c. III, I, IV, II d. IV, II, I, III l​