Each of the major continents at the beginning of the Paleozoic had two major components. These were a(n) ____
A)trough and a range
B)craton and a mobile belt
C)immobile belt and a rift margin
D)craton and a ocean basin
E)volcano and a desert
B
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Dark energy bends the curvature of spacetime
A) in the exact same fashion as gravity. B) in the opposite manner of gravity. C) by absorbing all lightwaves that pass through it. D) Dark energy does not bend the curvature of spacetime.
Barrier islands are ____
a. perpendicular but attached to the shore b. parallel but separate from land c. broad and offshore d. part of the mainland e. migrating away from shore as sea level rises
Mammatus clouds are associated with this type of cloud
A) altostratus. B) nimbostratus. C) stratocumulus. D) cumulonimbus. E) altocumulus.
________ are groups of the same kinds of atoms that cannot be broken down into other substances by ordinary chemical means
A) Molecules B) Electrons C) Elements D) Minerals