33.Abrupt changes in seismic velocities within Earth\'s interior suggest that: 1

Question

33.Abrupt changes in seismic velocities within Earth's interior suggest that: 1) the Earth's internal 3) the Earth composition is not uniform 2) layers of different rock density are encountered differentiated during its formation 4) all of these. 34. When a P-wave enters the Earth's outer core, it will: 1) speed up 2) slowdown 3) keep the same velocity 4) disappear. 35. Evidence for a molten outer core of the Earth comes from the study of which type of earthquake wave? 1) tidal wave 2) S-wave 3) L-wave 4) New Wave. 36. The inner core of the Earth is most likely composed of: 1) solid iron and nickel 2) granite 3) peridotite 4) molten iron and nickel. 37.The thickest part of the Earth's crust can be found: 1) in the ocean basin 2) at the mid Atlantic ridge 3) at the Moho 4) beneath mountain ranges.

Explanation / Answer

33. Abrupt changes in seismic velocities within earth's interior sugges that all of the above. Because, seismic velocity depends on density, compostion and differentiation of earth by which solid high denser materials accumulated to the core and lighter materials to the earth's crust.

34. When a P-wave enters the earths outer core, it will slow down. Because P wave pass through solid and liquid but travel more slowly through liquids than solids.

35. Evidence for molten outer core of the earth comes from the study of S-wave. Because S-waves do not travel through liquids.

36. The inner core of the earth is most likely composed of solid iron and nickel.

37. The thickest part of the earths crust can be found beneath mountain ranges.

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