41. What is the difference between a relative age and a numerical age? A. A nume

Question

41. What is the difference between a relative age and a numerical age?

A. A numerical age is given in years

B. A numerical age is related to magnetic reversals

C. A relative age is the age of your uncle

D. A relative age describes the age of one event relative to another event

E. A and D

42. Layering within the interior of the Earth is defined by:

A. The Mohorvicic Discontinuity

B. Chemical variations

C. Physical variations

D. Rheological variations

E. B, C and D

43. The Wilson Cycle describes:

A. The motion of continents

B. The opening and closing of oceanic basins through plate tectonics

C. The lunar cycle

D. The solar cycle

E. None of the above

44. Why is oceanic lithosphere able to subduct after 10,000 years?

A. It is less dense then continental lithosphere

B. It is less dense than the asthenosphere

C. It is denser than the asthenosphere

D. It is saturated with seawater

E. It is more dense than seawater

45. Cleavage in a mineral is controlled by which of the following?

A. Planes along which bonding is weak

B. The predominant direction light is transmitted through a crystal

C. Linear chains of oxygen atoms

D. Breakage planes caused by high pressure

E. Cracks formed by applied high temperature

46. SiO2 is the chemical composition of which of the following minerals?

A. Gypsum

B. Amphibole

C. Halite

D. Pyroxene

E. None of the above.

47. (Mg, Fe)2SiO4 is the chemical composition of which of the following minerals?

A. Gypsum

B. Calcite

C. Halite

D. Olivine

E. None of the above

48. The Doppler Effect was used to demonstrate what about the Universe?

A. It is contracting

B. It stopped expanding after the Big Bang

C. It is expanding

D. It is a black hole

E. None of the above

Explanation / Answer

41) A and D

42) E

43) The opening and closing of oceanic basins through plate tectonics

44) It is denser than the asthenosphere

45) Planes along which bonding is weak

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