Plate tectonics
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The theory of plate tectonics describes how the Earth's crust is broken into plates that move around on the mantle. The lithosphere consists of the crust and rigid upper mantle, which floats on the asthenosphere, a plastic layer that allows the plates to move. There are two types of plates - oceanic and continental. Plates interact at boundaries, where they can move apart, collide together, or slide past one another, causing earthquakes. Convection currents in the mantle provide the driving force for plate tectonics as hot rock rises and cools, sinking and repeating the cycle.
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Plate tectonics
The document discusses the theory of plate tectonics. [1] The Earth's crust and upper mantle are broken into sections called plates that move around on top of the mantle. [2] The lithosphere comprises the crust and part of the upper mantle and "floats" on the asthenosphere, which is the plastic layer below. [3] There are two types of plates - ocean plates below oceans and continental plates below continents.
Plate Tectonics
This ppt is about 3 theories of plate tectonics: Continental drift, seafloor spreading and theory of plate tectonics
Theory of Plate Tectonics
The document discusses plate tectonics and the theory that Earth's outer shell is divided into plates that glide over the mantle. It describes three main types of plate boundaries: convergent boundaries where plates collide, divergent boundaries where plates move apart, and transform boundaries where plates slide past each other. Convergent boundaries can involve subduction zones and result in mountain building. Divergent boundaries create new crust and can form undersea ridges or split continents. Transform boundaries cause earthquakes as stress builds up between sliding plates.
Plate tectonics, earthquakes, and volcanism final(3)1
The document discusses plate tectonics theory and the evidence that supports it. Plate tectonics theory proposes that the Earth's outer layer is made up of rigid plates that move over the asthenosphere below. Plates move by separating at mid-ocean ridges and colliding in other areas. When plates collide, one plate generally subducts under the other. The theory is supported by paleomagnetism data, the distribution of earthquakes along plate boundaries, the ages of seafloor sediments, and hotspot tracks.
Sea Floor Spreading
New evidence supported the theory of sea floor spreading and plate tectonics. Mapping of the seafloor using sonar revealed a mid-ocean ridge running through the Atlantic Ocean. Rocks near the ridge are younger, becoming progressively older further from the ridge, showing new crust is generated at the ridge through sea floor spreading. While new crust is created at ridges, older oceanic crust is recycled back into the Earth through subduction at plate boundaries, keeping the size of the Earth stable over time. This evidence of sea floor spreading supported Wegener's theory of continental drift.
2.4 tectonic plate boundaries
The document discusses three types of plate boundaries:
1) Divergent boundaries, where plates pull apart and new crust is formed, examples include mid-ocean ridges and continental rift valleys.
2) Convergent boundaries, where plates push together, examples include oceanic-continental collisions which form volcanoes and trenches, and oceanic-oceanic collisions which form island arcs.
3) Transform boundaries, where plates slide horizontally past one another along transform faults.
Plate Tectonics
The theory of plate tectonics describes how the Earth's crust is broken into plates that move around on the mantle. The lithosphere consists of the crust and rigid upper mantle, while the asthenosphere below is plastic and allows the plates to move. There are two types of plates - oceanic and continental. Plates interact at boundaries, including divergent boundaries where new crust is formed, convergent boundaries where plates collide and form features like volcanoes, and transform boundaries where plates slide past each other. Plate movement is caused by convection currents in the underlying mantle.
Chapter 1 Plate Tectonics Power Point
The document discusses Earth's structure and plate tectonics. It describes how Earth formed layers with different densities, including the inner and outer core, mantle, crust, and lithosphere. The lithosphere is made up of tectonic plates that move over time. There are three types of plate boundaries - divergent where plates move apart, convergent where they push together, and transform where they scrape past each other. Plate tectonics explains how continents have changed positions over billions of years and continue to move today.
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Plate tectonics
The document discusses the theory of plate tectonics. [1] The Earth's crust and upper mantle are broken into sections called plates that move around on top of the mantle. [2] The lithosphere comprises the crust and part of the upper mantle and "floats" on the asthenosphere, which is the plastic layer below. [3] There are two types of plates - ocean plates below oceans and continental plates below continents.
Plate Tectonics
This ppt is about 3 theories of plate tectonics: Continental drift, seafloor spreading and theory of plate tectonics
Theory of Plate Tectonics
The document discusses plate tectonics and the theory that Earth's outer shell is divided into plates that glide over the mantle. It describes three main types of plate boundaries: convergent boundaries where plates collide, divergent boundaries where plates move apart, and transform boundaries where plates slide past each other. Convergent boundaries can involve subduction zones and result in mountain building. Divergent boundaries create new crust and can form undersea ridges or split continents. Transform boundaries cause earthquakes as stress builds up between sliding plates.
Plate tectonics, earthquakes, and volcanism final(3)1
The document discusses plate tectonics theory and the evidence that supports it. Plate tectonics theory proposes that the Earth's outer layer is made up of rigid plates that move over the asthenosphere below. Plates move by separating at mid-ocean ridges and colliding in other areas. When plates collide, one plate generally subducts under the other. The theory is supported by paleomagnetism data, the distribution of earthquakes along plate boundaries, the ages of seafloor sediments, and hotspot tracks.
Sea Floor Spreading
New evidence supported the theory of sea floor spreading and plate tectonics. Mapping of the seafloor using sonar revealed a mid-ocean ridge running through the Atlantic Ocean. Rocks near the ridge are younger, becoming progressively older further from the ridge, showing new crust is generated at the ridge through sea floor spreading. While new crust is created at ridges, older oceanic crust is recycled back into the Earth through subduction at plate boundaries, keeping the size of the Earth stable over time. This evidence of sea floor spreading supported Wegener's theory of continental drift.
2.4 tectonic plate boundaries
The document discusses three types of plate boundaries:
1) Divergent boundaries, where plates pull apart and new crust is formed, examples include mid-ocean ridges and continental rift valleys.
2) Convergent boundaries, where plates push together, examples include oceanic-continental collisions which form volcanoes and trenches, and oceanic-oceanic collisions which form island arcs.
3) Transform boundaries, where plates slide horizontally past one another along transform faults.
Plate Tectonics
The theory of plate tectonics describes how the Earth's crust is broken into plates that move around on the mantle. The lithosphere consists of the crust and rigid upper mantle, while the asthenosphere below is plastic and allows the plates to move. There are two types of plates - oceanic and continental. Plates interact at boundaries, including divergent boundaries where new crust is formed, convergent boundaries where plates collide and form features like volcanoes, and transform boundaries where plates slide past each other. Plate movement is caused by convection currents in the underlying mantle.
Chapter 1 Plate Tectonics Power Point
The document discusses Earth's structure and plate tectonics. It describes how Earth formed layers with different densities, including the inner and outer core, mantle, crust, and lithosphere. The lithosphere is made up of tectonic plates that move over time. There are three types of plate boundaries - divergent where plates move apart, convergent where they push together, and transform where they scrape past each other. Plate tectonics explains how continents have changed positions over billions of years and continue to move today.
Plate Boundaries
The document describes the four main types of plate boundaries:
1) Divergent boundaries occur at spreading centers where new crust is created and plates move apart, such as at the Mid-Atlantic Ridge.
2) Convergent boundaries exist where plates collide and one is subducted under the other, forming deep ocean trenches.
3) Transform boundaries result from two plates sliding past each other horizontally, such as along the San Andreas Fault.
4) Continent-continent collisions buckle and uplift massive mountain ranges, as when India collided with Asia to form the Himalayas.
2.3 theory of plate tectonics
The document summarizes the theory of plate tectonics. It explains that the Earth's crust is broken into plates that move due to convection currents in the mantle. There are three types of plate boundaries - divergent where plates move apart and new crust is formed, convergent where plates collide and one slides under the other, and transform where plates slide past each other. The constant movement of plates is what creates geological features like mountains and ocean trenches.
Grade 10 _Plate Tectonics2_Science10.ppt
The document discusses the theory of plate tectonics, including what plates are, how they move, and the three types of plate boundaries. The three types of boundaries are divergent boundaries, where plates move apart; convergent boundaries, where plates move towards each other; and transform boundaries, where plates move past each other laterally. Each boundary type results in different geologic features and events due to the stresses caused by the ways plates are pulled, pushed, or sheared at their edges.
Plate Tectonics
The document discusses the theory of plate tectonics, including what plates are made of, how they move at boundaries, and the evidence that supports plate tectonics. The lithosphere comprises the crust and rigid upper mantle, floating on the asthenosphere. Plates move at boundaries in three types - divergent, convergent, and transform - which are associated with volcanoes, earthquakes, and other surface phenomena. Evidence like matching continents, widespread fossil distributions, and matching rock formations support plate tectonics and the past connection of continents.
Plate Tectonics Notes
- The Earth's crust is made up of tectonic plates that are constantly moving due to convection currents in the mantle.
- There are three types of plate boundaries: divergent where plates separate and new crust is formed, convergent where plates collide and oceanic plates are subducted, and transform where plates slide past each other.
- Evidence for plate tectonics includes magnetic patterns in ocean crust, matching fossils and rock formations on separated continents, and the fit of continental shelves. Plate movements have caused continents like Pangaea to break apart over millions of years.
Plate movement ppt
This document provides an overview of plate tectonics and the evidence that supports the theory. It discusses how early scientists like Alfred Wegener proposed that continents move over time (continental drift). Wegener noticed matching land features and fossil evidence between continents. Later, Harry Hess confirmed Wegener's ideas by discovering that new crust forms at mid-ocean ridges, providing evidence of sea-floor spreading as plates move apart. Convection currents in the mantle caused by heat from the Earth's core are now understood to drive the movement of tectonic plates.
Sea floor spreading
Scientists in the 1950s used sonar to map the mid-ocean ridge and discovered it was not flat but contained underwater mountains. This discovery led them to research what the ridge was and how it formed. Evidence from molten rock samples, magnetic stripes in the ocean crust, and the ages of rocks drilled from the ocean floor supported Harry Hess' theory from 1960 of sea-floor spreading, where new crust forms at mid-ocean ridges and spreads outward over time.
Seafloor spreading theory discuss 3
1. Harry Hess proposed the theory of seafloor spreading in 1962, which provided evidence that Wegener's theory of continental drift was correct. Hess theorized that new ocean crust is formed at mid-ocean ridges through volcanic eruptions and then spreads outwards, pushing older crust farther away.
2. Evidence for seafloor spreading includes rock formations only possible from cooled lava, magnetic stripe patterns in ocean crust recording reversals of Earth's magnetic field, and drilling samples showing younger rock nearer to ridges.
3. Seafloor spreading is driven by convection currents in the Earth's mantle; subduction zones allow parts of ocean crust to sink back into the mantle and regulate ocean size.
Sea floor spreading powerpoint
The document discusses sea floor spreading and the evidence that supports this theory. It describes how molten material rises up from the mantle at mid-ocean ridges, cools and forms new crust that constantly pushes older crust outward. It spreads until the dense oceanic crust sinks back into the mantle at deep ocean trenches in the process of subduction, which balances out the growth at ridges. Key evidence includes magnetic stripes in the crust, drilling samples, and the overall structure of ridges and trenches.
Tectonic processes
This Powerpoint Presentaion is used for my 11th Grade Earth Science Reporting as a major requirement for our sujbect. It talks about the tectonic processes and Plate boundaries with its theories..
Seafloor Spreading
Earth and Life Science
Earth Materials and Processes: Deformation of the Crust
The learners shall be able to:
1) explain how the seafloor spreads (S11/12ESId-23);
2) describe the structure and evolution of ocean basins (S11/12ES-Id-24); and
3) explain how the movement of plates leads to the formation of folds and faults (S11/12ES-Id-22).
Specific Learning Outcomes
At the end of the lesson, the learners will be able to:
1. Discuss the history behind the Theory of Continental Drift;
2. Describe the Continental Drift Theory;
3. Enumerate and explain the evidence used to support the idea of drifting continents;
4. Identify major physiographic features of ocean basins
5. Describe the process of seafloor spreading
TYPES OF PLATE BOUNDARIES
This document discusses three main types of plate boundaries: divergent boundaries, convergent boundaries, and transform boundaries. It provides examples and describes the geological effects of each boundary type. It also discusses processes at divergent boundaries like mid-ocean ridges and continental rift valleys. Convergent boundaries include oceanic-oceanic convergence forming island arcs, and continental-oceanic convergence forming volcanic mountain ranges. Transform boundaries involve strike-slip faulting along plate edges. Additionally, the document touches on hot spot volcanism unrelated to plate boundaries.
Plate tectonics
The document discusses the theory of plate tectonics. It explains that the Earth's crust and upper mantle are broken into plates that move around on top of the mantle. Plates interact at boundaries where they diverge (move apart), converge (move together), or slide past one another. Convection currents in the mantle provide the driving force for plate tectonics.
Magmatism.pptx
Magma is molten rock located beneath the Earth's surface, specifically in the mantle and oceanic plates. When magma solidifies, it forms igneous rocks. Magma differs from lava in that magma is found in the magma chamber of volcanoes, while lava is the molten rock found on the Earth's surface after a volcanic eruption. Magmatism is the process where magma forms and moves within the lower crust and upper mantle of the Earth.
Dynamic earth ppt to go with notes
The theory of plate tectonics explains that Earth's outer layer is made up of plates that have moved throughout geological history. These plates float on top of the mantle and move at boundaries where they diverge, converge, or slide past one another. Convection currents in the upper mantle provide the driving force that causes plates to move over time.
Divergent boundary
Divergent plate boundaries occur when tectonic plates pull apart from each other. Rising convection currents in the mantle push up on lithospheric plates, stretching and thinning the crust until it breaks along parallel faults tilted outward. This forms mid-ocean ridges or rift valleys on land. As the plates continue diverging, new crust is formed by magma rising through the cracks from the asthenosphere. Examples of divergent boundaries include the East Africa rift and Rio Grande rift.
Volcanism
This document discusses key aspects of volcanism including:
- Volcanoes form due to movement of tectonic plates and magma rising from below Earth's surface.
- Most volcanoes occur at plate boundaries like divergent and convergent margins.
- The degree of violence in a volcanic eruption depends on factors like the gas content and viscosity of the magma as well as the silica content which determines eruption style.
- There are several types of volcanoes that differ in size and eruption type including composite, cinder cone, and shield volcanoes.
Platetectonics theory
The document discusses plate tectonic theory and provides evidence for plate tectonics. It explains that the lithosphere is broken into plates that move atop the asthenosphere due to convection currents in the mantle. There are three types of plate boundaries - divergent where plates move apart, convergent where they move together, and transform where they slide past each other. Plate tectonics helps explain geological phenomena like volcanoes, earthquakes, and mountain building.
Plate tectonics
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere.
Convection currents t notes
The document discusses convection currents in the Earth's mantle. It first defines heat transfer and the three types: radiation, conduction, and convection. Convection involves the movement of heated fluids and depends on differences in density caused by heating and cooling. Convection currents in the mantle are driven by heat rising from the Earth's core and mantle itself into the asthenosphere.
Plate tectonics overview, lesson 1 (1).ppt
The document discusses the theory of plate tectonics. It explains that the Earth's crust and upper mantle are broken into plates that move around on top of the mantle. There are two types of plates - ocean plates under oceans and continental plates under continents. Plates move due to convection currents in the mantle. Where plates meet there are three types of plate boundaries - divergent where plates move apart, convergent where they collide, and transform where they slide past each other. Key evidence for plate tectonics includes magnetic stripe patterns in ocean floors and geological features like mid-ocean ridges and trenches.
Naturalists at Large: Plate tectonics
The document discusses plate tectonics, including that the Earth's crust is broken into plates that move atop the mantle. There are two types of plates - oceanic and continental. Plates interact at three types of boundaries: divergent boundaries where plates separate and new seafloor is created, convergent boundaries where plates collide resulting in subduction zones or mountain building, and transform boundaries where plates slide past one another causing earthquakes. Convection currents in the underlying mantle are cited as the cause of plate tectonic movement.
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Plate Boundaries
The document describes the four main types of plate boundaries:
1) Divergent boundaries occur at spreading centers where new crust is created and plates move apart, such as at the Mid-Atlantic Ridge.
2) Convergent boundaries exist where plates collide and one is subducted under the other, forming deep ocean trenches.
3) Transform boundaries result from two plates sliding past each other horizontally, such as along the San Andreas Fault.
4) Continent-continent collisions buckle and uplift massive mountain ranges, as when India collided with Asia to form the Himalayas.
2.3 theory of plate tectonics
The document summarizes the theory of plate tectonics. It explains that the Earth's crust is broken into plates that move due to convection currents in the mantle. There are three types of plate boundaries - divergent where plates move apart and new crust is formed, convergent where plates collide and one slides under the other, and transform where plates slide past each other. The constant movement of plates is what creates geological features like mountains and ocean trenches.
Grade 10 _Plate Tectonics2_Science10.ppt
The document discusses the theory of plate tectonics, including what plates are, how they move, and the three types of plate boundaries. The three types of boundaries are divergent boundaries, where plates move apart; convergent boundaries, where plates move towards each other; and transform boundaries, where plates move past each other laterally. Each boundary type results in different geologic features and events due to the stresses caused by the ways plates are pulled, pushed, or sheared at their edges.
Plate Tectonics
The document discusses the theory of plate tectonics, including what plates are made of, how they move at boundaries, and the evidence that supports plate tectonics. The lithosphere comprises the crust and rigid upper mantle, floating on the asthenosphere. Plates move at boundaries in three types - divergent, convergent, and transform - which are associated with volcanoes, earthquakes, and other surface phenomena. Evidence like matching continents, widespread fossil distributions, and matching rock formations support plate tectonics and the past connection of continents.
Plate Tectonics Notes
- The Earth's crust is made up of tectonic plates that are constantly moving due to convection currents in the mantle.
- There are three types of plate boundaries: divergent where plates separate and new crust is formed, convergent where plates collide and oceanic plates are subducted, and transform where plates slide past each other.
- Evidence for plate tectonics includes magnetic patterns in ocean crust, matching fossils and rock formations on separated continents, and the fit of continental shelves. Plate movements have caused continents like Pangaea to break apart over millions of years.
Plate movement ppt
This document provides an overview of plate tectonics and the evidence that supports the theory. It discusses how early scientists like Alfred Wegener proposed that continents move over time (continental drift). Wegener noticed matching land features and fossil evidence between continents. Later, Harry Hess confirmed Wegener's ideas by discovering that new crust forms at mid-ocean ridges, providing evidence of sea-floor spreading as plates move apart. Convection currents in the mantle caused by heat from the Earth's core are now understood to drive the movement of tectonic plates.
Sea floor spreading
Scientists in the 1950s used sonar to map the mid-ocean ridge and discovered it was not flat but contained underwater mountains. This discovery led them to research what the ridge was and how it formed. Evidence from molten rock samples, magnetic stripes in the ocean crust, and the ages of rocks drilled from the ocean floor supported Harry Hess' theory from 1960 of sea-floor spreading, where new crust forms at mid-ocean ridges and spreads outward over time.
Seafloor spreading theory discuss 3
1. Harry Hess proposed the theory of seafloor spreading in 1962, which provided evidence that Wegener's theory of continental drift was correct. Hess theorized that new ocean crust is formed at mid-ocean ridges through volcanic eruptions and then spreads outwards, pushing older crust farther away.
2. Evidence for seafloor spreading includes rock formations only possible from cooled lava, magnetic stripe patterns in ocean crust recording reversals of Earth's magnetic field, and drilling samples showing younger rock nearer to ridges.
3. Seafloor spreading is driven by convection currents in the Earth's mantle; subduction zones allow parts of ocean crust to sink back into the mantle and regulate ocean size.
Sea floor spreading powerpoint
The document discusses sea floor spreading and the evidence that supports this theory. It describes how molten material rises up from the mantle at mid-ocean ridges, cools and forms new crust that constantly pushes older crust outward. It spreads until the dense oceanic crust sinks back into the mantle at deep ocean trenches in the process of subduction, which balances out the growth at ridges. Key evidence includes magnetic stripes in the crust, drilling samples, and the overall structure of ridges and trenches.
Tectonic processes
This Powerpoint Presentaion is used for my 11th Grade Earth Science Reporting as a major requirement for our sujbect. It talks about the tectonic processes and Plate boundaries with its theories..
Seafloor Spreading
Earth and Life Science
Earth Materials and Processes: Deformation of the Crust
The learners shall be able to:
1) explain how the seafloor spreads (S11/12ESId-23);
2) describe the structure and evolution of ocean basins (S11/12ES-Id-24); and
3) explain how the movement of plates leads to the formation of folds and faults (S11/12ES-Id-22).
Specific Learning Outcomes
At the end of the lesson, the learners will be able to:
1. Discuss the history behind the Theory of Continental Drift;
2. Describe the Continental Drift Theory;
3. Enumerate and explain the evidence used to support the idea of drifting continents;
4. Identify major physiographic features of ocean basins
5. Describe the process of seafloor spreading
TYPES OF PLATE BOUNDARIES
This document discusses three main types of plate boundaries: divergent boundaries, convergent boundaries, and transform boundaries. It provides examples and describes the geological effects of each boundary type. It also discusses processes at divergent boundaries like mid-ocean ridges and continental rift valleys. Convergent boundaries include oceanic-oceanic convergence forming island arcs, and continental-oceanic convergence forming volcanic mountain ranges. Transform boundaries involve strike-slip faulting along plate edges. Additionally, the document touches on hot spot volcanism unrelated to plate boundaries.
Plate tectonics
The document discusses the theory of plate tectonics. It explains that the Earth's crust and upper mantle are broken into plates that move around on top of the mantle. Plates interact at boundaries where they diverge (move apart), converge (move together), or slide past one another. Convection currents in the mantle provide the driving force for plate tectonics.
Magmatism.pptx
Magma is molten rock located beneath the Earth's surface, specifically in the mantle and oceanic plates. When magma solidifies, it forms igneous rocks. Magma differs from lava in that magma is found in the magma chamber of volcanoes, while lava is the molten rock found on the Earth's surface after a volcanic eruption. Magmatism is the process where magma forms and moves within the lower crust and upper mantle of the Earth.
Dynamic earth ppt to go with notes
The theory of plate tectonics explains that Earth's outer layer is made up of plates that have moved throughout geological history. These plates float on top of the mantle and move at boundaries where they diverge, converge, or slide past one another. Convection currents in the upper mantle provide the driving force that causes plates to move over time.
Divergent boundary
Divergent plate boundaries occur when tectonic plates pull apart from each other. Rising convection currents in the mantle push up on lithospheric plates, stretching and thinning the crust until it breaks along parallel faults tilted outward. This forms mid-ocean ridges or rift valleys on land. As the plates continue diverging, new crust is formed by magma rising through the cracks from the asthenosphere. Examples of divergent boundaries include the East Africa rift and Rio Grande rift.
Volcanism
This document discusses key aspects of volcanism including:
- Volcanoes form due to movement of tectonic plates and magma rising from below Earth's surface.
- Most volcanoes occur at plate boundaries like divergent and convergent margins.
- The degree of violence in a volcanic eruption depends on factors like the gas content and viscosity of the magma as well as the silica content which determines eruption style.
- There are several types of volcanoes that differ in size and eruption type including composite, cinder cone, and shield volcanoes.
Platetectonics theory
The document discusses plate tectonic theory and provides evidence for plate tectonics. It explains that the lithosphere is broken into plates that move atop the asthenosphere due to convection currents in the mantle. There are three types of plate boundaries - divergent where plates move apart, convergent where they move together, and transform where they slide past each other. Plate tectonics helps explain geological phenomena like volcanoes, earthquakes, and mountain building.
Plate tectonics
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere.
Convection currents t notes
The document discusses convection currents in the Earth's mantle. It first defines heat transfer and the three types: radiation, conduction, and convection. Convection involves the movement of heated fluids and depends on differences in density caused by heating and cooling. Convection currents in the mantle are driven by heat rising from the Earth's core and mantle itself into the asthenosphere.
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The document discusses the theory of plate tectonics. It explains that the Earth's crust and upper mantle are broken into plates that move around on top of the mantle. There are two types of plates - ocean plates under oceans and continental plates under continents. Plates move due to convection currents in the mantle. Where plates meet there are three types of plate boundaries - divergent where plates move apart, convergent where they collide, and transform where they slide past each other. Key evidence for plate tectonics includes magnetic stripe patterns in ocean floors and geological features like mid-ocean ridges and trenches.
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grade10platetectonics2science10-220919035752-6293034d (2).pdf
The document discusses the theory of plate tectonics, including what plates are, how they move, and the three types of plate boundaries. The three types of boundaries are divergent boundaries, where plates move apart; convergent boundaries, where plates move together resulting in subduction zones or mountain building; and transform boundaries, where plates slide past each other causing earthquakes. Stress at the different boundaries results in different types of faults.
Plate-Tectonics
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platetectonics-150620090712-lva1-app6892.pdf
This document provides an overview of the theory of plate tectonics. It explains that the Earth's crust and upper mantle are broken into plates that move around on top of the mantle. There are three main types of plate boundaries: convergent where plates collide, divergent where they move apart, and transform where they slide past each other. Convection currents in the Earth's mantle cause the plates to move by heating and cooling material in the mantle. As plates interact at boundaries, it causes volcanic activity and mountain building at convergent boundaries and new seafloor at divergent ones.
grade-10-plate-tectonics_compress.pdf
The Earth's crust is divided into 12 major tectonic plates that move due to convection currents in the underlying mantle. Plates interact along boundaries where they collide, pull apart, or slide past one another, causing volcanism and earthquakes. The three main types of plate boundaries are divergent boundaries where new crust is formed, convergent boundaries where plates collide and one subducts under the other, and transform boundaries where plates slide horizontally past each other. Plate tectonics theory explains the distribution of geological features such as volcanoes and earthquakes around the world.
Theory of Global Plate Tectonics.pptx
Tectonic plates are large slabs of rock that make up Earth's crust and upper mantle. They slowly move over time, interacting with each other in different ways along boundaries. There are three main types of boundaries: divergent boundaries where plates move apart, convergent boundaries where they push together, and transform boundaries where they slide horizontally past each other. The movement and interaction of tectonic plates is responsible for geological phenomena like earthquakes, volcanoes, and mountain building.
Sara Arif - EDSC 304 - Teacher Lecture & Guided Notes - Plate Tectonics and E...
The document discusses the theory of plate tectonics and how it explains the formation and movement of continents over time. Around 250 million years ago, all the continents were joined together in a supercontinent called Pangea. Over millions of years, Pangea broke apart and the continents drifted to their current locations, carried by tectonic plates in the Earth's mantle. New crust is formed at mid-ocean ridges as plates move apart, while older crust is recycled at deep ocean trenches as plates converge. The movement of tectonic plates causes earthquakes, particularly at plate boundaries where plates collide, slide past each other, or move apart.
Similar to Plate tectonics (20)
grade10platetectonics2science10-220919035752-6293034d (2).pdf
grade10platetectonics2science10-220919035752-6293034d (2).pdf
Sara Arif - EDSC 304 - Teacher Lecture & Guided Notes - Plate Tectonics and E...
Sara Arif - EDSC 304 - Teacher Lecture & Guided Notes - Plate Tectonics and E...
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Plate tectonics
- 2. Theory of Plate TectonicsTheory of Plate Tectonics Plate TectonicsPlate Tectonics Plate BoundariesPlate Boundaries Causes of Plate TectonicsCauses of Plate Tectonics
- 4. What is Plate TectonicsWhat is Plate Tectonics • The Earth’s crust and upper mantle are broken into sections called plates • Plates move around on top of the mantle like rafts
- 6. What is theWhat is the LithosphereLithosphere?? • The crust and part of the upper mantle = lithosphere –100 km thick –Less dense than the material below it so it “floats”
- 7. What is theWhat is the AsthenoshereAsthenoshere?? • The plastic layer below the lithosphere = asthenosphere • The plates of the lithosphere float on the asthenosphere
- 9. 2 Types of Plates2 Types of Plates • Ocean plates - plates below the oceans • Continental plates - plates below the continents
- 10. Questions...Questions... • What is the theory of plate tectonics? • What is the lithosphere? • What is the asthenosphere? • What is the connection between the two? • What are the two types of plates?
- 12. Divergent BoundariesDivergent Boundaries • Boundary between two plates that are moving apart or rifting • RIFTING causes SEAFLOOR SPREADING
- 13. Features of DivergentFeatures of Divergent BoundariesBoundaries • Mid-ocean ridges • rift valleys • fissure volcanoes
- 17. Convergent BoundariesConvergent Boundaries • Boundaries between two plates that are colliding • There are 3 types…
- 18. Type 1Type 1 • Ocean plate colliding with a less dense continental plate • Subduction Zone: where the less dense plate slides under the more dense plate • VOLCANOES occur at subduction zones
- 20. Andes Mountains,Andes Mountains, South AmericaSouth America
- 21. Type 2Type 2 • Ocean plate colliding with another ocean plate • The less dense plate slides under the more dense plate creating a subduction zone called a TRENCH
- 23. Aleutian Islands, AlaskaAleutian Islands, Alaska
- 24. Type 3Type 3 • A continental plate colliding with another continental plate • Have Collision Zones: –a place where folded and thrust faulted mountains form.
- 27. Transform Fault BoundariesTransform Fault Boundaries • Boundary between two plates that are sliding past each other • EARTHQUAKES along faults
- 29. San Andreas Fault, CASan Andreas Fault, CA
- 30. Questions...Questions... • What are the three types of boundaries? • What direction do plates go for each? • Which boundary has a subduction zone…what occurs at a subduction zone?
- 31. Causes of PlateCauses of Plate TectonicsTectonics
- 32. Convection CurrentsConvection Currents • Hot magma in the Earth moves toward the surface, cools, then sinks again. • Creates convection currents beneath the plates that cause the plates to move.
- 34. Questions...Questions... • What causes plates to move? • How is a convection current formed?