10.2 Plate Tectonics
... · oceanic-continental continental plate floats (lighter, less dense) while the oceanic plate sinks, or subducts subduction zone - region where one plate moves under another deep-ocean trenches form magma rises and forms volcanic mountains ex. Andes in S. America, Cascades in Washington/ ...
... · oceanic-continental continental plate floats (lighter, less dense) while the oceanic plate sinks, or subducts subduction zone - region where one plate moves under another deep-ocean trenches form magma rises and forms volcanic mountains ex. Andes in S. America, Cascades in Washington/ ...
Plate Tectonics Power Point
... one is usually subducted under the other. An older oceanic plate is colder, therefore more dense and less buoyant, and will subduct under a younger, hotter, less dense, and more buoyant oceanic plate. In the process, a trench is formed. – The deepest trenches in the oceans are along oceanicoceanic s ...
... one is usually subducted under the other. An older oceanic plate is colder, therefore more dense and less buoyant, and will subduct under a younger, hotter, less dense, and more buoyant oceanic plate. In the process, a trench is formed. – The deepest trenches in the oceans are along oceanicoceanic s ...
EGU2012-6051
... thermal state of the mantle. In the present study we will present a number of 3D spherical numerical simulations of mantle convection with self-consistently generated plates and compositionally and rheologically-distinct continents floating at the top of the mantle. We will focus on the question of ...
... thermal state of the mantle. In the present study we will present a number of 3D spherical numerical simulations of mantle convection with self-consistently generated plates and compositionally and rheologically-distinct continents floating at the top of the mantle. We will focus on the question of ...
Plate boudaries
... Did you know that the ocean floor in the Atlantic is growing by 3cm per year? ...
... Did you know that the ocean floor in the Atlantic is growing by 3cm per year? ...
3. Ocean Geography Notes
... most about it. Consists of layered rocks located on 12 plates The MOHO separates the crust from the mantle Crust slides around on liquid mantle 5 km to 70 km in depth ...
... most about it. Consists of layered rocks located on 12 plates The MOHO separates the crust from the mantle Crust slides around on liquid mantle 5 km to 70 km in depth ...
The Earth`s structure
... paleontological and climatological data that indicated continents moved through time. He proposed the hypothesis of ‘continental drift’ to explain his data. However, Wegener’s theory was not accepted at the time because it could not account for a mechanism by which the huge continental masses move; ...
... paleontological and climatological data that indicated continents moved through time. He proposed the hypothesis of ‘continental drift’ to explain his data. However, Wegener’s theory was not accepted at the time because it could not account for a mechanism by which the huge continental masses move; ...
Plate Tectonics
... 1. An ocean floor plate collides with a less dense continental plate. 2. An ocean floor plate collides with another ocean floor plate. 3. A continental plate collides with another continental plate. ...
... 1. An ocean floor plate collides with a less dense continental plate. 2. An ocean floor plate collides with another ocean floor plate. 3. A continental plate collides with another continental plate. ...
Lesson 22: Plate Tectonics Slide 1: Title page and learning objective
... slab sinks down into the mantle to be recycled. It is for this reason that the oceanic crust is much younger than the continental crust, which is not recycled. E.g. is the Andres mountains located in South America Ocean-ocean collision: When two oceanic plates collide, one runs over the other which ...
... slab sinks down into the mantle to be recycled. It is for this reason that the oceanic crust is much younger than the continental crust, which is not recycled. E.g. is the Andres mountains located in South America Ocean-ocean collision: When two oceanic plates collide, one runs over the other which ...
2 Review Plate Tectonics l
... Plates are in motion and change in shape and size Largest plate is the Pacific plate ...
... Plates are in motion and change in shape and size Largest plate is the Pacific plate ...
Earth`s Layers Ppt
... made of the crust and the rigid rock of the upper mantle which is broken into tectonic plates Asthenosphere – the layer in earth’s upper mantle directly under the lithosphere in which rock is soft and weak because it is close to melting ...
... made of the crust and the rigid rock of the upper mantle which is broken into tectonic plates Asthenosphere – the layer in earth’s upper mantle directly under the lithosphere in which rock is soft and weak because it is close to melting ...
ppt presentation
... made of the crust and the rigid rock of the upper mantle which is broken into tectonic plates Asthenosphere – the layer in earth’s upper mantle directly under the lithosphere in which rock is soft and weak because it is close to melting ...
... made of the crust and the rigid rock of the upper mantle which is broken into tectonic plates Asthenosphere – the layer in earth’s upper mantle directly under the lithosphere in which rock is soft and weak because it is close to melting ...
earth`s thickest layer between the outer core and crust made of
... Crust – the top layer of earth made of a thin layer of cool rock Lithosphere – the layer of earth made of the crust and the rigid rock of the upper mantle which is broken into tectonic plates Asthenosphere – the layer in earth’s upper mantle directly under the lithosphere in which rock is soft and ...
... Crust – the top layer of earth made of a thin layer of cool rock Lithosphere – the layer of earth made of the crust and the rigid rock of the upper mantle which is broken into tectonic plates Asthenosphere – the layer in earth’s upper mantle directly under the lithosphere in which rock is soft and ...
BUGS Rocks Station 1 Plate Tectonics and the Rock Cycle
... the metaphor that the plates fit together like a puzzle. Have the students place their piece onto the map (putting the puzzle together). Have them tell which continent or ocean rests on or covers the plate they put down. Be sure to have the students notice where we live and the fault line that is un ...
... the metaphor that the plates fit together like a puzzle. Have the students place their piece onto the map (putting the puzzle together). Have them tell which continent or ocean rests on or covers the plate they put down. Be sure to have the students notice where we live and the fault line that is un ...
Sample Question Answer (300 Words)
... years ago, five continents existed; these continents sutured to form Pangaea. For the next 200 million years or so, Earth had but a single major continent and single world ocean. About 250 million years, Pangaea began to break up, first into two massive pieces – Laurasia in the Northern Hemisphere a ...
... years ago, five continents existed; these continents sutured to form Pangaea. For the next 200 million years or so, Earth had but a single major continent and single world ocean. About 250 million years, Pangaea began to break up, first into two massive pieces – Laurasia in the Northern Hemisphere a ...
Theory of Continental Drift
... About 400 years ago explorers were sailing the oceans and examining the coastlines. These ...
... About 400 years ago explorers were sailing the oceans and examining the coastlines. These ...
Continental Drift, sea floor spreading and plate tectonics PDF
... About 400 years ago explorers were sailing the oceans and examining the coastlines. These ...
... About 400 years ago explorers were sailing the oceans and examining the coastlines. These ...
Article - Cross Section of the Earth
... Scientists believe that Earth began as a molten ball over 4.5 billion years ago. Like any other molten body, as Earth cooled, the lighter materials floated to the surface and the heavier materials sank toward the interior. You may have observed the same process after letting gravy sit for a while. A ...
... Scientists believe that Earth began as a molten ball over 4.5 billion years ago. Like any other molten body, as Earth cooled, the lighter materials floated to the surface and the heavier materials sank toward the interior. You may have observed the same process after letting gravy sit for a while. A ...
Part III. Convergent Plate Boundaries
... • What is the major difference between seafloor spreading and rifting? • Answer: seafloor spreading occurs when oceanic crust separates, rifting is when continental crust separates ...
... • What is the major difference between seafloor spreading and rifting? • Answer: seafloor spreading occurs when oceanic crust separates, rifting is when continental crust separates ...
Unit D: Activity 48PSP Assessment KEY
... a. The earth’s crust moves around but is never destroyed. b. New crust is always forming on the top of large mountains. c. Old crust falls into the oceans and is destroyed over time. d. Old crust is destroyed and new crust is formed over time. Explain why you chose your answer: ...
... a. The earth’s crust moves around but is never destroyed. b. New crust is always forming on the top of large mountains. c. Old crust falls into the oceans and is destroyed over time. d. Old crust is destroyed and new crust is formed over time. Explain why you chose your answer: ...
Chapter 17 Notes Know the definition of each of these vocabulary
... ridges and destroyed at deep sea trenches. This was the missing link needed by Wegener to complete his model for continental drift. There are a dozen or so major plates and several smaller plates. Tectonic plates move in different directions and different rates over the Earth’s surface. Tectonic pla ...
... ridges and destroyed at deep sea trenches. This was the missing link needed by Wegener to complete his model for continental drift. There are a dozen or so major plates and several smaller plates. Tectonic plates move in different directions and different rates over the Earth’s surface. Tectonic pla ...
Earth`s Layers Online Activity Directions: Dig into the Lithosphere
... 4. The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the ...
... 4. The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the ...
power point - HRSBSTAFF Home Page
... Tall thin spires of rock that protrude from the bottom of arid basins and badlands Composed of soft sedimentary rock, topped by a piece of harder rock ...
... Tall thin spires of rock that protrude from the bottom of arid basins and badlands Composed of soft sedimentary rock, topped by a piece of harder rock ...
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.