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Unit 3 Lesson 1 Layers of the Earth
... The crust is rich in the elements oxygen and silicon with lesser amounts of aluminum, iron, magnesium, calcium, potassium, and sodium. There are two types of crust. Basalt is the most common rock on Earth. Oceanic crust is made of relatively dense rock called basalt. Continental crust is made of low ...
... The crust is rich in the elements oxygen and silicon with lesser amounts of aluminum, iron, magnesium, calcium, potassium, and sodium. There are two types of crust. Basalt is the most common rock on Earth. Oceanic crust is made of relatively dense rock called basalt. Continental crust is made of low ...
Plate Tectonics
... Time duration 50-60 minutes Vocabulary Sea-floor spreading Continental drift Plate tectonics Ocean plates Continental plates Plate convergence Plate divergence Subduction Transform Fault aging ocean plates continental collision convection core crust density driving force geologic features mantle con ...
... Time duration 50-60 minutes Vocabulary Sea-floor spreading Continental drift Plate tectonics Ocean plates Continental plates Plate convergence Plate divergence Subduction Transform Fault aging ocean plates continental collision convection core crust density driving force geologic features mantle con ...
Unit 7 Plate Tectonics: Key Concept Notes
... Wegener’s ideas were not accepted because he couldn’t show how continents could move thousands of miles to their current locations. Today, it is known that the crust is broken into 15 major tectonic plates that all move due to convection currents in the Earths’ mantle. Three types of tectonic plate ...
... Wegener’s ideas were not accepted because he couldn’t show how continents could move thousands of miles to their current locations. Today, it is known that the crust is broken into 15 major tectonic plates that all move due to convection currents in the Earths’ mantle. Three types of tectonic plate ...
ch 13 PPT File
... 1. Fossils found on one continent were similar to fossils found on another continent. 2. Mountain layers seem to continue from one continent to another. 3. Glacier deposits were found at the equator where glaciers can not exist. ...
... 1. Fossils found on one continent were similar to fossils found on another continent. 2. Mountain layers seem to continue from one continent to another. 3. Glacier deposits were found at the equator where glaciers can not exist. ...
The Earth Layers
... Hydrosphere ( Water)- The liquid part of the earth ( ocean, river). Atmosphere( Air)-Gas part of the earth. ...
... Hydrosphere ( Water)- The liquid part of the earth ( ocean, river). Atmosphere( Air)-Gas part of the earth. ...
plate tectonics
... WHAT EVIDENCE PROVED CONTINENTAL DRIFT AND LED TO THE MODERN THEORY OF PLATE TECTONICS?__________________________________________________ _______________________________________________________________ _______________________________________________________________ ...
... WHAT EVIDENCE PROVED CONTINENTAL DRIFT AND LED TO THE MODERN THEORY OF PLATE TECTONICS?__________________________________________________ _______________________________________________________________ _______________________________________________________________ ...
Theory of Plate Tectonics
... Convergent plate boundary – boundary where plates move toward each other o Depends Continental/continental – fold and buckle - mountains Oceanic/oceanic – underwater mountains Continental/oceanic – oceanic plate sinks and melts – this is where tectonic plates are destroyed (subduction zone – o ...
... Convergent plate boundary – boundary where plates move toward each other o Depends Continental/continental – fold and buckle - mountains Oceanic/oceanic – underwater mountains Continental/oceanic – oceanic plate sinks and melts – this is where tectonic plates are destroyed (subduction zone – o ...
File
... ridges and trenches – areas of spreading and receding as if the ocean floor was an accordion. ...
... ridges and trenches – areas of spreading and receding as if the ocean floor was an accordion. ...
Name Date Period ______ Reading Guide 13.1 Volcanoes and
... 6. The cause of many volcanic eruptions is the ________________________ of tectonic _________________. The movement of tectonic plates is driven by Earth’s _____________________ heat. 7. What 2 characteristics of Earth’s interior keep rocks below their melting point? ...
... 6. The cause of many volcanic eruptions is the ________________________ of tectonic _________________. The movement of tectonic plates is driven by Earth’s _____________________ heat. 7. What 2 characteristics of Earth’s interior keep rocks below their melting point? ...
Plate Tectonics DQ - Biloxi Public Schools
... 2. Alfred Wegner’s Theory of Continental Drift was not well accepted because he couldn’t say what force could be big enough to move continents. Current theories explain this movement with---A. subduction zones at continental margins. B. hot spots forming under continents. C. magnetic reversals of th ...
... 2. Alfred Wegner’s Theory of Continental Drift was not well accepted because he couldn’t say what force could be big enough to move continents. Current theories explain this movement with---A. subduction zones at continental margins. B. hot spots forming under continents. C. magnetic reversals of th ...
Development of the Theory of Plate Tectonics
... Reversals of Earth’s magnetic field are recorded by rocks in strips parallel to ridges. ...
... Reversals of Earth’s magnetic field are recorded by rocks in strips parallel to ridges. ...
study guide for plate tectonics assessment c example
... 9. What formed the Hawaiian Islands? Shield volcanoes fed by a long-lived hot spot below the Pacific lithospheric plate. 10. What type of rock forms the Oceanic Plates? What type of rock forms the Continental Plates? 11. Where does new ocean crust form during seafloor spreading? Divergent boundaries ...
... 9. What formed the Hawaiian Islands? Shield volcanoes fed by a long-lived hot spot below the Pacific lithospheric plate. 10. What type of rock forms the Oceanic Plates? What type of rock forms the Continental Plates? 11. Where does new ocean crust form during seafloor spreading? Divergent boundaries ...
No Slide Title - physicalallen
... Crust is divided into a dozen major plates & many other smaller plates Each plate is moving relative to the other plates creating Earth’s surface features ~ mountains, trenches & volcanoes ...
... Crust is divided into a dozen major plates & many other smaller plates Each plate is moving relative to the other plates creating Earth’s surface features ~ mountains, trenches & volcanoes ...
Name: Date: Period:____ Study Guide for Plate Tectonics Key 1
... Pangaea-supercontinent from continental drift; Laurasia (top half of supercontinent once it broke into 2 parts; Gondwana- bottom half of supercontinent) ...
... Pangaea-supercontinent from continental drift; Laurasia (top half of supercontinent once it broke into 2 parts; Gondwana- bottom half of supercontinent) ...
Plate Tectonics
... 12 major plates, move at an average of 1 inch per year. Lithosphere-crust and upper mantle plates are composed of. The lithosphere floats on top of the a plastic-like layer called the Asthenosphere ...
... 12 major plates, move at an average of 1 inch per year. Lithosphere-crust and upper mantle plates are composed of. The lithosphere floats on top of the a plastic-like layer called the Asthenosphere ...
Plate Tectonics - msaldrichscience
... There are mountain ranges, mid-ocean ridges, divergent plates, convergent plates and transform boundaries. There is also rift valleys which means long large valley formed where continent is pulled apart by forces made when mantle rises up beneath the continent. ...
... There are mountain ranges, mid-ocean ridges, divergent plates, convergent plates and transform boundaries. There is also rift valleys which means long large valley formed where continent is pulled apart by forces made when mantle rises up beneath the continent. ...
lithosphere, mid-ocean ridge
... What evidence from the sea floor shows that tectonic plates move? a. The sea floor is much older than any of the continents. b. The sea floor is youngest near a mid-ocean ridge and ...
... What evidence from the sea floor shows that tectonic plates move? a. The sea floor is much older than any of the continents. b. The sea floor is youngest near a mid-ocean ridge and ...
The Sea Floor - Mrs. Gallegos Website
... Occasional continental vs. continental - because of low density, neither tends to subduct - get “welded together” or cause buckling and fold ...
... Occasional continental vs. continental - because of low density, neither tends to subduct - get “welded together” or cause buckling and fold ...
study guide
... NAME ____________________________________________ DATE__________________ PER______ On what pieces of evidence did Wegener base his continental drift hypothesis? ...
... NAME ____________________________________________ DATE__________________ PER______ On what pieces of evidence did Wegener base his continental drift hypothesis? ...
Supporting the theory of Plate tectonics
... deep-focus earthquakes and ocean trenches. • The absence of deep-focus earthquakes along the oceanic ridge system was shown to be consistent with the new theory. ...
... deep-focus earthquakes and ocean trenches. • The absence of deep-focus earthquakes along the oceanic ridge system was shown to be consistent with the new theory. ...
Plate Tectonics - Holy Angels School
... • A boundary at which two plates move past each other horizontally is called a transform boundary. At transform boundaries, the motion of the two plates often produces earthquakes. What causes tectonic plates to move? • Scientists have proposed three mechanisms to explain how tectonic plates move: m ...
... • A boundary at which two plates move past each other horizontally is called a transform boundary. At transform boundaries, the motion of the two plates often produces earthquakes. What causes tectonic plates to move? • Scientists have proposed three mechanisms to explain how tectonic plates move: m ...
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.