front 1 ____ was an ancient reptile that lived in South America during the late Paleozoic. | back 1 Mesosaurus |
front 2 In the early part of the 20th century, ____ argued forcefully for continental drift. | back 2 Alfred Wegener |
front 3 The former late Paleozoic super continent is known as ____. | back 3 Pangaea |
front 4 Today, ____ is in about the same geographic position as during late Paleozoic time. | back 4 Antarctica |
front 5 What paleoclimatic evidence supports the idea of the late Paleozoic supercontinent in the Southern hemisphere? | back 5 tillites (rocks formed by glaciers) in South Africa and South America. |
front 6 Pull -apart rift zones are generally associated with a ____ plate boundary. | back 6 divergent |
front 7 The temperature below which a magnetic material can retain a permenant magnetization is called the ____. | back 7 Curie point |
front 8 A very long-lived magma source located deep in the mantle is called a ____. | back 8 hot spot |
front 9 Linear, magnetic patterens associated with mid-ocean ridges are configured as ____. | back 9 normal and reversed magnitized strips roughly parallel to the ridge. |
front 10 The ____ is(are) a revolutionary analog of the African Rift Valleys ten million years from now. | back 10 Red Sea |
front 11 A typical rate of seafloor spreading in the Atlantic Ocean is ____. | back 11 2 centimeters per year. |
front 12 What energy source is thought to drive the lateral motions of earth's lithospheric plates? | back 12 export of heat from deep in the mantle to the top of the asthenosphere. |
front 13 The continental drift hypothesis was rejected primarily because Alfred Wegener could not ____. | back 13 identify a mechanism capable of moving continents. |
front 14 What is not evidence that supports the theory of plate tectonics? | back 14 changes in the moon's orbit due to shifting plates. |
front 15 ____ was never proposed as evidence supporting the existence of Pangaea. | back 15 Islands of Precambrian rocks along the Mid-Atlantic ridge. |
front 16 What most accurately describes the volcanoes of the Hawaiian Islands? | back 16 sheild volcanoes fed by a long-lived hot spot below the Pacific lithosphere plate. |
front 17 What statement applies to the asthenosphere but not the lithosphere? | back 17 zone in the upper mantle that deforms by plastic flowage. |
front 18 New oceanic crust and lithosphere are formed at ____. | back 18 divergent boundaries by submarine eruptions and intrusions of basaltic magma. |
front 19 Cooler, older, ocaenic lithosphere sinks into the mantle at ____. | back 19 subduction zones along convergent plate boundaries. |
front 20 Deep ocean trenches are surficial evidence for ____. | back 20 sinking of oceanic lithosphere into the mantle at a subduction zone. |
front 21 A transform plate boundary is characterized by ____. | back 21 a deep, verticle vault along which two plates slide past one another in opposite directions. |
front 22 What is an important fundamental assumption underlying the plate tectonic theory. | back 22 Earth's diameter has been essentially constant over time. |
front 23 The modern-day Red Sea is explained by tectonics theory because it is ____. | back 23 a rift zone that may eventually open into a major ocean if Arabia and Africa continue to separate. |
front 24 Mount St. Helens and other cascade volcanoes are ____. | back 24 young, active strato volcanoes built on a continental margin above a sinking slab of oceanic lithosphere. |
front 25 The volcanoes and deep valleys of East Africa are related to a____. | back 25 continental rift along which parts of the African continent are beginning to slowly separate. |
front 26 The Aleutian Islands occur at ____. | back 26 convergent boundary on a volcanic arc above a northward-subconducting Pacific plate. |
front 27 ____ most effectively outline the edges of the lithospheric plates. | back 27 Lines of earthquake epicenters. |
front 28 Deep-oceanic trenches are most abundant around the rim of the ____ ocean basin. | back 28 Pacific |
front 29 Where would you drill to recover samples of the oldest basalts of the oceanic crust, which are Jurassic in age? | back 29 oceanic side of the Aleutian trench. |
front 30 ____ first related the symmetrical magnetic patterns in seafloor basalts to seafloor spreading at a mid-ocean ridge. | back 30 Vine and Mathews |
front 31 Early results of the deep Sea Drilling Project clearly justified the conclusion that ____. | back 31 the ocean basins are relatively young; most ocean basin rocks and sediments are Cretaceous or younger. |
front 32 divergent | back 32 plates are moving apart from one another. |
front 33 convergent | back 33 plates are moving toward one another |
front 34 transform | back 34 plates are sliding past one another horizontally |
front 35 This boundary is normally devoid of volcanism | back 35 transform plate boundary |
front 36 Where lithosphere is sinking into the mantle | back 36 convergent plate boundary |
front 37 Characterized by basaltic volcanism and seafloor spreading | back 37 divergent plate boundary |
front 38 characterized by arcs of stratovolcanoes and deep-ocean trenches. | back 38 convergent plate boundary |
front 39 The Mid-Atlantic Ridge is a ____. | back 39 divergent plate boundary |
front 40 Where subduction zones occur | back 40 convergent plate boundary |
front 41 The San Andreas fault is a ____. | back 41 transform plate boundary |
front 42 The west coast of South America is a ____. | back 42 convergent plate boundary. |