Plate Tectonics
... Oceanic crust is generated by igneous activity at mid-ocean ridges and eventually is recycled back into the mantle at subduction zone (due to its higher density) ...
... Oceanic crust is generated by igneous activity at mid-ocean ridges and eventually is recycled back into the mantle at subduction zone (due to its higher density) ...
First Hour Exam, Fall, 2016
... 9. Which of the following is not a valid type of tectonic plate boundary? a. a transform boundary c. a convergent boundary b. a shoreline boundary d. a divergent boundary 10. The upper mantle is believed to be composed mostly of a. olivine and pyroxene c. clays and other sheet silicates b. iron and ...
... 9. Which of the following is not a valid type of tectonic plate boundary? a. a transform boundary c. a convergent boundary b. a shoreline boundary d. a divergent boundary 10. The upper mantle is believed to be composed mostly of a. olivine and pyroxene c. clays and other sheet silicates b. iron and ...
Meg Anderson Earth Unit Test SOL: 5.7 Read each question
... Read each question carefully. Circle the correct answer. (2 points each) 1. Which process is NOT involved in the rock cycle? a. melting b. cooling c. condensation d. erosion 2. A convergent boundary is MOST likely to form: a. a volcano b. a mountain range c. a fault d. an island 3. When two tectonic ...
... Read each question carefully. Circle the correct answer. (2 points each) 1. Which process is NOT involved in the rock cycle? a. melting b. cooling c. condensation d. erosion 2. A convergent boundary is MOST likely to form: a. a volcano b. a mountain range c. a fault d. an island 3. When two tectonic ...
The Crustal and Upper Mantle Shear Velocity Structure of Eastern
... long enough wavelength they can penetrate the upper mantle. Potentially, joint inversion can provide accurate shear-wave velocity structure to better understand the elastic moduli and densities of the study regions. Since both receiver functions and surface wave dispersion curves are sensitive to th ...
... long enough wavelength they can penetrate the upper mantle. Potentially, joint inversion can provide accurate shear-wave velocity structure to better understand the elastic moduli and densities of the study regions. Since both receiver functions and surface wave dispersion curves are sensitive to th ...
Handout 2New - Glendale Community College
... How do divergent and convergent boundaries work to keep earth the same size? Describe the 3 types of convergent plate boundaries. Give examples of each. Why does oceanic crust sink below continental crust? What 2 things happen as a subducting plate sinks back into the earth? Why are convergent volca ...
... How do divergent and convergent boundaries work to keep earth the same size? Describe the 3 types of convergent plate boundaries. Give examples of each. Why does oceanic crust sink below continental crust? What 2 things happen as a subducting plate sinks back into the earth? Why are convergent volca ...
Chapter 4 Exercises 1. Observations and experiments show that rate
... temperature and are then removed from the magma change the composition of the residual liquid, which in turn crystallizes to form more silica-rich igneous rocks. 7. In the crust, a partial melt of basaltic composition might be found in the oceanic crust, near a mid-ocean ridge. In the mantle, a part ...
... temperature and are then removed from the magma change the composition of the residual liquid, which in turn crystallizes to form more silica-rich igneous rocks. 7. In the crust, a partial melt of basaltic composition might be found in the oceanic crust, near a mid-ocean ridge. In the mantle, a part ...
Fall Semester Exam Review 2016 Define the following organisms
... 4. Divergent Boundaries: Plates are moving away from each other. On land, when two continental plates separate, a rift valley is created. In water, when two oceanic plates separate, a mid ocean ridge is created. 5. Transform Boundaries: Plates are sliding past each other horizontally in opposite dir ...
... 4. Divergent Boundaries: Plates are moving away from each other. On land, when two continental plates separate, a rift valley is created. In water, when two oceanic plates separate, a mid ocean ridge is created. 5. Transform Boundaries: Plates are sliding past each other horizontally in opposite dir ...
Flash Cards - tclauset.org
... file:///E|/BlueHost3_22_09/16_StGuides/es-ch7/ch7-quizflash-questions.htm (10 of 13) [11/22/2010 6:16:49 PM] ...
... file:///E|/BlueHost3_22_09/16_StGuides/es-ch7/ch7-quizflash-questions.htm (10 of 13) [11/22/2010 6:16:49 PM] ...
Inside Earth Worksheets
... extreme conditions in Earth’s interior prevent exploration far below the surface. Geologists have used two main types of evidence to learn about Earth’s interior: direct evidence from rock samples and indirect evidence from seismic waves. Rocks from inside Earth give geologists clues about Earth’s s ...
... extreme conditions in Earth’s interior prevent exploration far below the surface. Geologists have used two main types of evidence to learn about Earth’s interior: direct evidence from rock samples and indirect evidence from seismic waves. Rocks from inside Earth give geologists clues about Earth’s s ...
Forces in Earth’s Crust
... These landforms include anticlines and synclines, folded mountains, fault-block mountains, and plateaus. ...
... These landforms include anticlines and synclines, folded mountains, fault-block mountains, and plateaus. ...
Layers of the Earth Notes - Howard Elementary School
... Earth’s Layers by Composition • Core – Below the mantle; at the center of Earth – Makes up 1/3 of Earth’s mass – Composed primarily of iron and nickel • Almost no oxygen, silicon, aluminum, or magnesium ...
... Earth’s Layers by Composition • Core – Below the mantle; at the center of Earth – Makes up 1/3 of Earth’s mass – Composed primarily of iron and nickel • Almost no oxygen, silicon, aluminum, or magnesium ...
PLATE BOUNDARY LOCALIZATION: WHAT PROCESSES ACTIVE
... planet has adopted a global tectonic regime that appears unique in the solar system [1]. Deformation is localized in narrow deformation zones, some of which do no contribute to removing heat from the interior of the planet [2]. Because of the higher strain rate inside narrow deformation zones, energ ...
... planet has adopted a global tectonic regime that appears unique in the solar system [1]. Deformation is localized in narrow deformation zones, some of which do no contribute to removing heat from the interior of the planet [2]. Because of the higher strain rate inside narrow deformation zones, energ ...
EARTH SYSTEMS SCIENCE LECTURE TEST # 2
... 29. ? is the direction of a horizontal line in the plane of bedding. A.strike B.dip C.this describes both strike and dip 30. The Hawaiian Islands are examples of a ? plate boundary. A.divergent B.oceanic-oceanic convergent C.oceanic-continental convergent D.transform E.the Hawaiian Islands are not a ...
... 29. ? is the direction of a horizontal line in the plane of bedding. A.strike B.dip C.this describes both strike and dip 30. The Hawaiian Islands are examples of a ? plate boundary. A.divergent B.oceanic-oceanic convergent C.oceanic-continental convergent D.transform E.the Hawaiian Islands are not a ...
Updated Assignment sheet 09
... margin of Mexico and Central America. The earthquake epicenters are colorcoded by depth: green refers to shallow-depth quakes, yellow to intermediate-depth quakes, and red to deep earthquakes. If you zoom in slightly, red symbols denoting the position of recently active volcanoes should appear – the ...
... margin of Mexico and Central America. The earthquake epicenters are colorcoded by depth: green refers to shallow-depth quakes, yellow to intermediate-depth quakes, and red to deep earthquakes. If you zoom in slightly, red symbols denoting the position of recently active volcanoes should appear – the ...
Plate Tectonics as Expressed in Geological Landforms and Events
... margin of Mexico and Central America. The earthquake epicenters are colorcoded by depth: green refers to shallow-depth quakes, yellow to intermediate-depth quakes, and red to deep earthquakes. If you zoom in slightly, red symbols denoting the position of recently active volcanoes should appear – the ...
... margin of Mexico and Central America. The earthquake epicenters are colorcoded by depth: green refers to shallow-depth quakes, yellow to intermediate-depth quakes, and red to deep earthquakes. If you zoom in slightly, red symbols denoting the position of recently active volcanoes should appear – the ...
left click to view and right click to download.
... http://cgi.pbs.org/wgbh/aso/tryit/tectonics/divergent.html 1. New ocean floor is created at what part of an underwater mountain chain? It is called a ridge. 2. Sea floor spreading is the name scientists give to the formation of new crust on the ocean floor. CLICK ON Slippin’ and Slidin’ http://cgi.p ...
... http://cgi.pbs.org/wgbh/aso/tryit/tectonics/divergent.html 1. New ocean floor is created at what part of an underwater mountain chain? It is called a ridge. 2. Sea floor spreading is the name scientists give to the formation of new crust on the ocean floor. CLICK ON Slippin’ and Slidin’ http://cgi.p ...
The Historical Background
... and therefore they could not sink to become ocean basins. Continents and oceans were not interchangeable. Third, and most fundamental, physicists discovered radiogenic heat, which contradicted the basic assumption of contraction theory that the earth was steadily cooling. With contraction no longer ...
... and therefore they could not sink to become ocean basins. Continents and oceans were not interchangeable. Third, and most fundamental, physicists discovered radiogenic heat, which contradicted the basic assumption of contraction theory that the earth was steadily cooling. With contraction no longer ...
Lecture 2
... • Oceanic crust is composed of basalt, a dark colored, higher density (2.9 gm/cm3) volcanic rock rich in silicon, oxygen and magnesium. ...
... • Oceanic crust is composed of basalt, a dark colored, higher density (2.9 gm/cm3) volcanic rock rich in silicon, oxygen and magnesium. ...
2013249 - Geological Society of America
... triple junction, as the magnetic bight between the Japanese and Hawaiian lineation sets is clearly identified. There are uncertainties associated with reconstructing the exact history of ridge subduction, asymmetries of spreading where we only have information on one plate preserved, and several oth ...
... triple junction, as the magnetic bight between the Japanese and Hawaiian lineation sets is clearly identified. There are uncertainties associated with reconstructing the exact history of ridge subduction, asymmetries of spreading where we only have information on one plate preserved, and several oth ...
Splash Screen
... • During accretion, continents can grow outward. • If two sea plates converge, an island chain may form. ...
... • During accretion, continents can grow outward. • If two sea plates converge, an island chain may form. ...
Isostatic Adjustments
... in the rocks along a break it is called fracture. • When rocks do move at a break it is called a fault. ...
... in the rocks along a break it is called fracture. • When rocks do move at a break it is called a fault. ...
Mountain Building DOC
... • During subduction, sediment is scraped from the subducting plate. The sediment forms a large mass called an accretionary wedge, which becomes attached to the overriding crustal block. At a convergent boundary, a collision between two plates carrying continental crust will form folded mountains. Th ...
... • During subduction, sediment is scraped from the subducting plate. The sediment forms a large mass called an accretionary wedge, which becomes attached to the overriding crustal block. At a convergent boundary, a collision between two plates carrying continental crust will form folded mountains. Th ...
Chapter 17: Plate Tectonics
... • Wegener used the existence of coal beds in Antarctica to conclude that Antarctica must have been much closer to the equator at some point ...
... • Wegener used the existence of coal beds in Antarctica to conclude that Antarctica must have been much closer to the equator at some point ...
lithosphere_42344
... • The lithosphere is plate like in that it behaves rigidly - there are very few intraplate earthquakes - plates transmit stress; little deformation except at the edges • The lithosphere behaves elastically over geologic timescales, whereas the underlying mantle behaves like a viscous fluid • Tempera ...
... • The lithosphere is plate like in that it behaves rigidly - there are very few intraplate earthquakes - plates transmit stress; little deformation except at the edges • The lithosphere behaves elastically over geologic timescales, whereas the underlying mantle behaves like a viscous fluid • Tempera ...
Earth Systems 3209 - Heritage Collegiate
... 10. This science is divided into two broad divisions-physical and historical. a) Geology b) Meteorology c) Biology d) Oceanography e) Astronomy 11. Which one of the following is an example of a nonrenewable resource? a) water energy b) iron c) chickens d) lumber e) cotton 12. In scientific inquiry, ...
... 10. This science is divided into two broad divisions-physical and historical. a) Geology b) Meteorology c) Biology d) Oceanography e) Astronomy 11. Which one of the following is an example of a nonrenewable resource? a) water energy b) iron c) chickens d) lumber e) cotton 12. In scientific inquiry, ...
Plate tectonics
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός ""pertaining to building"") is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.