Plate Tectonics - cloudfront.net
... Earth’s Layers The Earth's rocky outer crust solidified billions of years ago, soon after the Earth formed. This crust is not a solid shell; it is broken up into huge, thick plates that drift atop the soft, underlying mantle. ...
... Earth’s Layers The Earth's rocky outer crust solidified billions of years ago, soon after the Earth formed. This crust is not a solid shell; it is broken up into huge, thick plates that drift atop the soft, underlying mantle. ...
Crustal Features
... • The crust is part of the lithosphere, the outermost layer of the crust. • Plates are part of the crust. (continental crust/plate and oceanic crust/plate) • The convection currents in the mantle layer below and perhaps also gravity cause the plates to move. ...
... • The crust is part of the lithosphere, the outermost layer of the crust. • Plates are part of the crust. (continental crust/plate and oceanic crust/plate) • The convection currents in the mantle layer below and perhaps also gravity cause the plates to move. ...
PS 2-6-08 - elyceum-beta
... • The oldest ocean rock is farthest away from the ridges • The coldest and most dense rock is farthest away from the ridges ...
... • The oldest ocean rock is farthest away from the ridges • The coldest and most dense rock is farthest away from the ridges ...
Sea Floor Spreading NOTES 2016 Key
... If seafloor spreading DID NOT occur, the ocean floor would be __flat___. ...
... If seafloor spreading DID NOT occur, the ocean floor would be __flat___. ...
Mr. Burton 2.3 Notes
... Below the earth’s surface The planet’s continents, or large landmasses, are part of Earth’s crust—the solid outer layer of the planet. Theory of plate tectonics suggests that Earth’s surface is divided into a dozen or so slow-moving plates, or pieces of Earth’s crust. The idea that continents ...
... Below the earth’s surface The planet’s continents, or large landmasses, are part of Earth’s crust—the solid outer layer of the planet. Theory of plate tectonics suggests that Earth’s surface is divided into a dozen or so slow-moving plates, or pieces of Earth’s crust. The idea that continents ...
Chapter 1 - HCC Learning Web
... of the rigid, brittle crust and uppermost mantle. Rigid lithospheric or tectonic plates rest (or "float") on the asthenosphere, the easily deformed, or partially molten part of mantle below the lithosphere. All the tectonic plates are moving, but their rates and directions of movement vary. ...
... of the rigid, brittle crust and uppermost mantle. Rigid lithospheric or tectonic plates rest (or "float") on the asthenosphere, the easily deformed, or partially molten part of mantle below the lithosphere. All the tectonic plates are moving, but their rates and directions of movement vary. ...
Sea Floor Evidence The technologies developed in the 1940s and
... material is the farthest from the spreading centers and is the next crust to be subducted. Sea floor age maps have been proven correct by the age dates calculated from hundreds of rock samples gathered from the ocean floor. Seismic studies. More proof for sea floor spreading comes from seismic studi ...
... material is the farthest from the spreading centers and is the next crust to be subducted. Sea floor age maps have been proven correct by the age dates calculated from hundreds of rock samples gathered from the ocean floor. Seismic studies. More proof for sea floor spreading comes from seismic studi ...
8. Intro to Oceanography and Seafloor
... "Plate Tectonics" - refers to the formation and migration of these lithospheric plates, a. Problem: time spans of plate motion on order of 10' of to 100's of million's of years, ...
... "Plate Tectonics" - refers to the formation and migration of these lithospheric plates, a. Problem: time spans of plate motion on order of 10' of to 100's of million's of years, ...
FREE Sample Here
... One of the major pieces of evidence for his theory is the discovery of mid-ocean ridge system in the ocean basins. These ridges are a continuous chain of submarine volcanoes and geologic activity is concentrated around these areas. At these ridges, oceanic crust is separating as molten rock flows fr ...
... One of the major pieces of evidence for his theory is the discovery of mid-ocean ridge system in the ocean basins. These ridges are a continuous chain of submarine volcanoes and geologic activity is concentrated around these areas. At these ridges, oceanic crust is separating as molten rock flows fr ...
Passing Plates I - The Theory By Trista L
... studies, he also invented the term plate which meant large masses of moving rock. Now the plate tectonic theory really starts shaking! Wilson proposed that our planet was divided into seven large plates and several smaller plates. The plates were part of the crust.. These plates would move in relati ...
... studies, he also invented the term plate which meant large masses of moving rock. Now the plate tectonic theory really starts shaking! Wilson proposed that our planet was divided into seven large plates and several smaller plates. The plates were part of the crust.. These plates would move in relati ...
Continental Drift - Imaginique Bengals
... Science is based on more than mere empirical observation — we strive to understand the mechanisms. We must develop a theory to explain our observations. Wegener's idea of continental drift was not generally accepted because no one could come up with a reasonable mechanism for the movement of the co ...
... Science is based on more than mere empirical observation — we strive to understand the mechanisms. We must develop a theory to explain our observations. Wegener's idea of continental drift was not generally accepted because no one could come up with a reasonable mechanism for the movement of the co ...
Seafloor Spreading - explained how continents could move
... plates move because mantle is highly plastic just below surface convection current rise from center, break crust slide at rates of a few cm/yr midocean rise and rift - where new crust is formed subduction zone - old crust destroyed, deepest part of oceans melts, lowlow-density magma rises, volcanos, ...
... plates move because mantle is highly plastic just below surface convection current rise from center, break crust slide at rates of a few cm/yr midocean rise and rift - where new crust is formed subduction zone - old crust destroyed, deepest part of oceans melts, lowlow-density magma rises, volcanos, ...
PRESENTSS
... We can further divide the crust into Continental and Oceanic types based on their composition and densities. ...
... We can further divide the crust into Continental and Oceanic types based on their composition and densities. ...
Objective: Students will diagram faults, waves and volcanoes in
... 2. convergent boundaries (mountains/subduction) = occur where plates ____ _____________. 3. transform boundaries = occur where plates _________ past each other. The sea floor spreads apart at divergent boundaries. • ________ _______________ = a gap formed when ridges continue to widen (molten materi ...
... 2. convergent boundaries (mountains/subduction) = occur where plates ____ _____________. 3. transform boundaries = occur where plates _________ past each other. The sea floor spreads apart at divergent boundaries. • ________ _______________ = a gap formed when ridges continue to widen (molten materi ...
Theory of Plate Tectonics
... • https://www.youtube.com/watch?v=Wx9vPvT51I&x-yt-cl=84359240&x-ytts=1421782837&feature=player_detailpage ...
... • https://www.youtube.com/watch?v=Wx9vPvT51I&x-yt-cl=84359240&x-ytts=1421782837&feature=player_detailpage ...
TAKS Review - Greenslime
... age of rocks continues to increase the further away from the ridge Iron bearing minerals record Earth’s magnetic field reversing these rocks show same field direction equal distance either side of the mid ocean ridge ...
... age of rocks continues to increase the further away from the ridge Iron bearing minerals record Earth’s magnetic field reversing these rocks show same field direction equal distance either side of the mid ocean ridge ...
TAKS Review - Greenslime Home Page
... age of rocks continues to increase the further away from the ridge Iron bearing minerals record Earth’s magnetic field reversing these rocks show same field direction equal distance either side of the mid ocean ridge ...
... age of rocks continues to increase the further away from the ridge Iron bearing minerals record Earth’s magnetic field reversing these rocks show same field direction equal distance either side of the mid ocean ridge ...
Chapter 1 Review answers
... 2. tensional force: occurs when plates break apart, moving away from or past each other, which sometimes forms a trench as one plate drops downward. ...
... 2. tensional force: occurs when plates break apart, moving away from or past each other, which sometimes forms a trench as one plate drops downward. ...
Ch 12 Vocabulary - Taylor County Schools
... Earth on the seafloor. Formed at a divergent plate boundary. Rift Valley – Long, linear, dropped-down valley between twin, parallel mountain ranges produced by faulting. ...
... Earth on the seafloor. Formed at a divergent plate boundary. Rift Valley – Long, linear, dropped-down valley between twin, parallel mountain ranges produced by faulting. ...
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 ...
Inside the Restless Earth
... Volcanoes – (Ch. 6) 22. How do Volcanoes form? Volcanoes form at convergent boundaries when oceanic crust is subducted and forced down toward the mantle where it melts, becomes less dense, and rise back to toward the surface as magma, eventually erupting from a volcano. Volcanoes can also form along ...
... Volcanoes – (Ch. 6) 22. How do Volcanoes form? Volcanoes form at convergent boundaries when oceanic crust is subducted and forced down toward the mantle where it melts, becomes less dense, and rise back to toward the surface as magma, eventually erupting from a volcano. Volcanoes can also form along ...
Plate: a rigid slab of solid lithosphere rock that has defined
... By measuring the movement of the earth they can determine if the fault plates are locked or creeping steadily and also measure the amount of movement of the plates. This will help them ...
... By measuring the movement of the earth they can determine if the fault plates are locked or creeping steadily and also measure the amount of movement of the plates. This will help them ...
Chapter 9 web
... divergent plate boundaries. • ____ _______ are deep faulted structures found along the axes of divergent plate boundaries. They can develop on the seafloor or on land. • ____________ ___________ produces new oceanic lithosphere. ...
... divergent plate boundaries. • ____ _______ are deep faulted structures found along the axes of divergent plate boundaries. They can develop on the seafloor or on land. • ____________ ___________ produces new oceanic lithosphere. ...
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.