We have textbook solutions for you! The document you are viewing contains questions related to this textbook. The document you are viewing contains questions related to this textbook. Nature of Mathematics Smith Expert Verified 1 ____ was an ancient reptile that lived in South America during the late Paleozoic. 2 In the early part of the 20th century, ____ argued forcefully for continental drift. 3 The former late Paleozoic super continent is known as ____. 4 Today, ____ is in about the same geographic position as during late Paleozoic time. 5 What paleoclimatic evidence supports the idea of the late Paleozoic supercontinent in the Southern hemisphere? tillites (rocks formed by glaciers) in South Africa and South America. 6 Pull -apart rift zones are generally associated with a ____ plate boundary. 7 The temperature below which a magnetic material can retain a permenant magnetization is called the ____. 8 A very long-lived magma source located deep in the mantle is called a ____. 9 Linear, magnetic patterens associated with mid-ocean ridges are configured as ____. normal and reversed magnitized strips roughly parallel to the ridge. 10 The ____ is(are) a revolutionary analog of the African Rift Valleys ten million years from now. 11 A typical rate of seafloor spreading in the Atlantic Ocean is ____. 12 What energy source is thought to drive the lateral motions of earth's lithospheric plates? export of heat from deep in the mantle to the top of the asthenosphere. 13 The continental drift hypothesis was rejected primarily because Alfred Wegener could not ____. identify a mechanism capable of moving continents. 14 What is not evidence that supports the theory of plate tectonics? changes in the moon's orbit due to shifting plates. 15 ____ was never proposed as evidence supporting the existence of Pangaea. Islands of Precambrian rocks along the Mid-Atlantic ridge. 16 What most accurately describes the volcanoes of the Hawaiian Islands? sheild volcanoes fed by a long-lived hot spot below the Pacific lithosphere plate. 17 What statement applies to the asthenosphere but not the lithosphere? zone in the upper mantle that deforms by plastic flowage. 18 New oceanic crust and lithosphere are formed at ____. divergent boundaries by submarine eruptions and intrusions of basaltic magma. 19 Cooler, older, ocaenic lithosphere sinks into the mantle at ____. subduction zones along convergent plate boundaries. 20 Deep ocean trenches are surficial evidence for ____. sinking of oceanic lithosphere into the mantle at a subduction zone. 21 A transform plate boundary is characterized by ____. a deep, verticle vault along which two plates slide past one another in opposite directions. 22 What is an important fundamental assumption underlying the plate tectonic theory. Earth's diameter has been essentially constant over time. 23 The modern-day Red Sea is explained by tectonics theory because it is ____. a rift zone that may eventually open into a major ocean if Arabia and Africa continue to separate. 24 Mount St. Helens and other cascade volcanoes are ____. young, active strato volcanoes built on a continental margin above a sinking slab of oceanic lithosphere. 25 The volcanoes and deep valleys of East Africa are related to a____. continental rift along which parts of the African continent are beginning to slowly separate. 26 The Aleutian Islands occur at ____. convergent boundary on a volcanic arc above a northward-subconducting Pacific plate. 27 ____ most effectively outline the edges of the lithospheric plates. Lines of earthquake epicenters. 28 Deep-oceanic trenches are most abundant around the rim of the ____ ocean basin. 29 Where would you drill to recover samples of the oldest basalts of the oceanic crust, which are Jurassic in age? oceanic side of the Aleutian trench. 30 ____ first related the symmetrical magnetic patterns in seafloor basalts to seafloor spreading at a mid-ocean ridge. 31 Early results of the deep Sea Drilling Project clearly justified the conclusion that ____. the ocean basins are relatively young; most ocean basin rocks and sediments are Cretaceous or younger. plates are moving apart from one another. plates are moving toward one another plates are sliding past one another horizontally 35 This boundary is normally devoid of volcanism 36 Where lithosphere is sinking into the mantle convergent plate boundary 37 Characterized by basaltic volcanism and seafloor spreading 38 characterized by arcs of stratovolcanoes and deep-ocean trenches. convergent plate boundary 39 The Mid-Atlantic Ridge is a ____. 40 Where subduction zones occur convergent plate boundary 41 The San Andreas fault is a ____. 42 The west coast of South America is a ____. convergent plate boundary.
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In the early part of the twentieth century, ________ argued forcefully for continental drift.
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