43) Which of following evidence supporting continental drift was not used by Weg

Question

43) Which of following evidence supporting continental drift was not used by Wegener in 1912? A) Plant and other fossil distribution B) Continent shapes (outlines) C) The age of the oceanic crust D) The location of tillites and direction of movement of glaciers 44) Which of the following minerals is a silicate? A) hematite B) muscovite C) calcite D) halite 45) Which mineral is easily soluble in water at room temperature conditions? A) diamond B) talc C) halite D) olivine plate boundaries. 46) Deep-focus, large magnitude earthquakes are associated with A) divergent B) convergent (subducting) C) transform D) lateral 47) Which one of the following describes a mineral's response to mechanical impact? A) luster B) fracture C) streak D) hardness 48) All silicate minerals contain which two elements? A) iron, silicon B) silicon, sodium C) oxygen, carbon D) silicon, oxygen 49) Dinosaurs largely became extinct at the end of the ago A) Cretaceous B) Ordoviciarn C) Jurassic D) Dinosaurian period about 65 mil

Explanation / Answer

43. C. He didn't consider the age of the oceanic crust. The remaining are his considerations as they match in many cases.

44. B. Muscovite is the silicate mineral with more silica in it.

45. C.Halite is another name of rock salt and rock salt easily mixes with water at room temperature.

46. B. Convergent boundaries have the larger impact as the two plates collide and one may subduct. This energy is responsible for high magnitude earthquake.

47. B. Fracture is the response of a mineral. When there is a weak structure in the mineral then it give a fracture. When the impact is high the weak part breaks first.

48. D. All silicate minerals contain silicon and oxygen forming a tetrahedron.

49. A. At the end of the Cretaceous period dianosurs extincted in large number.

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