Plate tectonics is - Faculty Server Contact
... Geology 101: Plate Tectonics Introduction: Plate tectonics is the widely accepted scientific theory of large-scale movements and deformation of the Earth's lithosphere (the crust and upper mantle). All of the continents and ocean floor that we see today sit upon rigid plates that are independent of ...
... Geology 101: Plate Tectonics Introduction: Plate tectonics is the widely accepted scientific theory of large-scale movements and deformation of the Earth's lithosphere (the crust and upper mantle). All of the continents and ocean floor that we see today sit upon rigid plates that are independent of ...
continental drift - East Hanover Township School District
... insight to the mechanism for how the continents moved. • The magma which pushes up at the mid-ocean ridge provides the new land pushing the plates, and the subduction zones gobble up the land on the the other side of the plates. ...
... insight to the mechanism for how the continents moved. • The magma which pushes up at the mid-ocean ridge provides the new land pushing the plates, and the subduction zones gobble up the land on the the other side of the plates. ...
notes for geologofe - sciencepowerpoint.com
... Mafic lava – Flows more, high in basalt. Intermediate – Has a higher amount of silica (Silica = liquid quartz or sand) Viscosity: Resistance of liquid to flow. High viscosity = Travels slow because of high resistance Low viscosity = travels fast because low resistance Types of lava when cooled 'A'ā ...
... Mafic lava – Flows more, high in basalt. Intermediate – Has a higher amount of silica (Silica = liquid quartz or sand) Viscosity: Resistance of liquid to flow. High viscosity = Travels slow because of high resistance Low viscosity = travels fast because low resistance Types of lava when cooled 'A'ā ...
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... _______________17. A ___ boundary marks two plates that are moving apart. _______________18. A ___ boundary occurs where two plates slide past one another. _______________19. A ___ boundary occurs where two plates are pushing toward each other. _______________20. The boundary between the African pla ...
... _______________17. A ___ boundary marks two plates that are moving apart. _______________18. A ___ boundary occurs where two plates slide past one another. _______________19. A ___ boundary occurs where two plates are pushing toward each other. _______________20. The boundary between the African pla ...
Teacher Period _____ Date
... The main force that shapes our planet’s surface over long periods of time is the movement of Earth’s outer layer by the process of plate tectonics. The rigid outer layer of the Earth, called the lithosphere, is made of plates that fit together like a jigsaw puzzle. These plates are made of rock, but ...
... The main force that shapes our planet’s surface over long periods of time is the movement of Earth’s outer layer by the process of plate tectonics. The rigid outer layer of the Earth, called the lithosphere, is made of plates that fit together like a jigsaw puzzle. These plates are made of rock, but ...
earth`s crust and isostasy
... - Changes in crust density (mass or volume) affect how tectonic plates “float” on asthenosphere. ...
... - Changes in crust density (mass or volume) affect how tectonic plates “float” on asthenosphere. ...
Earth`s Interior
... information. Your challenge will be to demonstrate your understanding (to the teacher) at the end of this activity, by describing or illustrating Earth’s interior. You may wish to incorporate an egg. ...
... information. Your challenge will be to demonstrate your understanding (to the teacher) at the end of this activity, by describing or illustrating Earth’s interior. You may wish to incorporate an egg. ...
The Dynamic Earth – Plate Tectonics
... In 1965 Wilson proposed the concept that the crust of the Earth is a mosaic of interacting plates – hence “plate tectonics” These plates move relative to each other The continents ride on these plates ...
... In 1965 Wilson proposed the concept that the crust of the Earth is a mosaic of interacting plates – hence “plate tectonics” These plates move relative to each other The continents ride on these plates ...
Putting it all together - West Linn
... • Where is new rock formed (which plate boundaries?) • If it is new rock, what structures do you think are present in the earth at those plate boundaries? • Where/what does the new rock come from? (where/what was it before it became new rock?) • What happens to the rock that was there before the “ne ...
... • Where is new rock formed (which plate boundaries?) • If it is new rock, what structures do you think are present in the earth at those plate boundaries? • Where/what does the new rock come from? (where/what was it before it became new rock?) • What happens to the rock that was there before the “ne ...
CHAPTER 3CPLATE TECTONICS
... (f) The close fit of matching continental margins (for example, of South America and Africa). (g) The continuation of geologic structures from one continent to another, which are now separated by oceans (for example, the Appalachian-Caledonian mountain chain). 7. About 200 million years ago the cont ...
... (f) The close fit of matching continental margins (for example, of South America and Africa). (g) The continuation of geologic structures from one continent to another, which are now separated by oceans (for example, the Appalachian-Caledonian mountain chain). 7. About 200 million years ago the cont ...
Types Of Plate Boundaries
... crust from magma that makes its way to the surface. As lava builds up it forms underwater mountain ranges . Ex. Mid-Atlantic Ridge ...
... crust from magma that makes its way to the surface. As lava builds up it forms underwater mountain ranges . Ex. Mid-Atlantic Ridge ...
2013年1月12日托福写作真题回忆
... No very satisfactory account of the mechanism that caused the formation of the ocean basins has yet been given. The traditional view supposes that the upper mantle of the earth behaves as a liquid when it is subjected to small forces for long periods and that differences in temperature under oceans ...
... No very satisfactory account of the mechanism that caused the formation of the ocean basins has yet been given. The traditional view supposes that the upper mantle of the earth behaves as a liquid when it is subjected to small forces for long periods and that differences in temperature under oceans ...
plate tectonics
... A. Divergent - where two or more plates are moving away from one another - occurs primarily at the mid-ocean ridges - ex.: Mid-Atlantic Ridge - Great Rift Valley (Africa) ...
... A. Divergent - where two or more plates are moving away from one another - occurs primarily at the mid-ocean ridges - ex.: Mid-Atlantic Ridge - Great Rift Valley (Africa) ...
convection demonstration2
... What forces would lead to the movement of the plates over the surface of the earth? At this time it is believed this movement results from mantle convection. Mantle convection is the slow creeping motion of Earth's plastic mantle caused by currents carrying heat from the interior of the earth to the ...
... What forces would lead to the movement of the plates over the surface of the earth? At this time it is believed this movement results from mantle convection. Mantle convection is the slow creeping motion of Earth's plastic mantle caused by currents carrying heat from the interior of the earth to the ...
sc.912.e.6.1
... force for plate movement. • Convective flow is the motion of matter resulting from changes in temperature. ...
... force for plate movement. • Convective flow is the motion of matter resulting from changes in temperature. ...
True or False 1. Divergent boundaries can only be found in the
... 2. The Grand Tetons of Wyoming is an example of tilted-fault block mountain systems. (a) true (b) false 3. During El Niño years, Columbia River Basin’s streamflows tend to be low. (a) true (b) false 4. The Appalachians are older than the Rockies. (a) true (b) false Multiple choice 1. Terranes refer ...
... 2. The Grand Tetons of Wyoming is an example of tilted-fault block mountain systems. (a) true (b) false 3. During El Niño years, Columbia River Basin’s streamflows tend to be low. (a) true (b) false 4. The Appalachians are older than the Rockies. (a) true (b) false Multiple choice 1. Terranes refer ...
Name:
... 15. Thermal convection currents in the asthenosphere contribute to its gradual _________. The constant flowing movements in the asthenosphere greatly affect the _______________ features of our planet. 16. Situated above the asthenosphere is the ________________________. This layer is about 100 km th ...
... 15. Thermal convection currents in the asthenosphere contribute to its gradual _________. The constant flowing movements in the asthenosphere greatly affect the _______________ features of our planet. 16. Situated above the asthenosphere is the ________________________. This layer is about 100 km th ...
Plate Tectonics
... When an oceanic plate pushes into and subducts under a continental plate, the overriding continental plate is lifted up and a mountain range is created. Even though the oceanic plate as a whole sinks smoothly and continuously into the subduction trench, the deepest part of the subducting plate break ...
... When an oceanic plate pushes into and subducts under a continental plate, the overriding continental plate is lifted up and a mountain range is created. Even though the oceanic plate as a whole sinks smoothly and continuously into the subduction trench, the deepest part of the subducting plate break ...
Mountain Building - Hicksville Public Schools
... "standstill") is a term used in geology to refer to the state of gravitational equilibrium between the earth's lithosphere and asthenosphere such that the tectonic plates "float" at an elevation which depends on their thickness and density. – Parts of the crust will rise or subside (sink) until stab ...
... "standstill") is a term used in geology to refer to the state of gravitational equilibrium between the earth's lithosphere and asthenosphere such that the tectonic plates "float" at an elevation which depends on their thickness and density. – Parts of the crust will rise or subside (sink) until stab ...
plate_tectonics
... ________________________. 2. Adjust each of the variables ONE AT A TIME. Describe what happens to the plate when you adjust each variable. ...
... ________________________. 2. Adjust each of the variables ONE AT A TIME. Describe what happens to the plate when you adjust each variable. ...
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.