Notes - Earth Science Rocks
... sliding past each other. The sliding movement often causes earthquakes to occur. This happens along faults. A fault is nothing more than a crack in the Earth’s crust where movement has occurred. Ex. North American Plate and the Pacific Plate are sliding past each other along the San Andreas Fault in ...
... sliding past each other. The sliding movement often causes earthquakes to occur. This happens along faults. A fault is nothing more than a crack in the Earth’s crust where movement has occurred. Ex. North American Plate and the Pacific Plate are sliding past each other along the San Andreas Fault in ...
Continental drift - La Salle Elementary School
... O. Highlights for Section 3 pages 64-71 Evolution of Earth can be explained with Theory of Plate Tectonics. o Plates are moving – irregularly shaped slabs – fit together like paving stones Carry continents and are edged by trenches and ridges o Tectonics – branch of geology that deals with move ...
... O. Highlights for Section 3 pages 64-71 Evolution of Earth can be explained with Theory of Plate Tectonics. o Plates are moving – irregularly shaped slabs – fit together like paving stones Carry continents and are edged by trenches and ridges o Tectonics – branch of geology that deals with move ...
Plate Tectonics
... type of geological activity • Differs according to the way the plates move in relation to each other ...
... type of geological activity • Differs according to the way the plates move in relation to each other ...
Plate Boundaries
... Causes volcanic activity under water (similar to oceanic – continental) Forms a volcanic island arc (ex. The Aleutian Island) ...
... Causes volcanic activity under water (similar to oceanic – continental) Forms a volcanic island arc (ex. The Aleutian Island) ...
Plate Tectonics Revolution: how it came about
... The obvious importance of vertical motions in continental geology, leading to the "fixest" (versus "mobilist") synthesis that was the reigning theory for much of the first half of the last century. ...
... The obvious importance of vertical motions in continental geology, leading to the "fixest" (versus "mobilist") synthesis that was the reigning theory for much of the first half of the last century. ...
ALFRED WEGENER THEORY OF CONTINENTAL
... 1. What are “plates” 2. What impact can colliding plates have on the earth? 3. Define Subduction 4. What can subduction cause? 5. What causes earthquakes? 6. What happens when plates pull apart? 7. Define Pangea ...
... 1. What are “plates” 2. What impact can colliding plates have on the earth? 3. Define Subduction 4. What can subduction cause? 5. What causes earthquakes? 6. What happens when plates pull apart? 7. Define Pangea ...
Lecture 2.5 - St. Mark`s Boise
... crust of the earth is broken up into plates that float on the liquid mantel and is driven by convection currents within the mantle. ...
... crust of the earth is broken up into plates that float on the liquid mantel and is driven by convection currents within the mantle. ...
Plate Tectonics
... They are now being ripped apart. The white arrows show the directions the two plates are moving. You can see that a new ocean, the Red Sea is being formed as they separate. ...
... They are now being ripped apart. The white arrows show the directions the two plates are moving. You can see that a new ocean, the Red Sea is being formed as they separate. ...
Geology Study Guide
... 3. How did Alfred Wegener build evidence for this theory of continental drift? __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ ____________________ ...
... 3. How did Alfred Wegener build evidence for this theory of continental drift? __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ ____________________ ...
Plate tectonics
... 1. Cite three independent lines of evidence that support the continental drift hypothesis and describe the hypothesis’ major weakness. 2. Distinguish between the three types of plate boundaries based on the relative motions of the lithosphere plates across them and the general patterns of seismicity ...
... 1. Cite three independent lines of evidence that support the continental drift hypothesis and describe the hypothesis’ major weakness. 2. Distinguish between the three types of plate boundaries based on the relative motions of the lithosphere plates across them and the general patterns of seismicity ...
file_n_2
... Richter Scale: Open scale designed to measure the energy developed by a seism, i.e. its magnitude. Measure of the maximum amplitude of the seismic waves recorded by a standard seismograph at a distance of 100 km of the epicentre Epicentre: Point on the Earth surface located vertically to the focus. ...
... Richter Scale: Open scale designed to measure the energy developed by a seism, i.e. its magnitude. Measure of the maximum amplitude of the seismic waves recorded by a standard seismograph at a distance of 100 km of the epicentre Epicentre: Point on the Earth surface located vertically to the focus. ...
Divergent Boundary
... • Subduction- process by which ocean crust sinks beneath a deep-ocean trench and back into the mantle ...
... • Subduction- process by which ocean crust sinks beneath a deep-ocean trench and back into the mantle ...
Plate Tectonic Theory
... moves slowly downward forming convection currents within the asthenosphere • Rising convection currents diverge where they approach the surface pulling on the plate above it creating a divergent plate boundary • two sides move away in opposite directions, cracks between the diverging plates fill wit ...
... moves slowly downward forming convection currents within the asthenosphere • Rising convection currents diverge where they approach the surface pulling on the plate above it creating a divergent plate boundary • two sides move away in opposite directions, cracks between the diverging plates fill wit ...
Internal Structure of the Earth
... • Both dense plates are pushed towards the center of the Earth • Extremely deep trenches are formed, and also chains of volcanic islands are created (island arcs) • The Japanese Islands are formed this way. ...
... • Both dense plates are pushed towards the center of the Earth • Extremely deep trenches are formed, and also chains of volcanic islands are created (island arcs) • The Japanese Islands are formed this way. ...
Name
... Explain the theory of plate tectonics. Explain the 3 pieces of evidence that support the theory. The theory of plate tectonics is that the Earth’s lithosphere is divided into tectonic plates that drift/float on the asthenosphere. Plates move by convection currents. 1. Continental Drift theory- plate ...
... Explain the theory of plate tectonics. Explain the 3 pieces of evidence that support the theory. The theory of plate tectonics is that the Earth’s lithosphere is divided into tectonic plates that drift/float on the asthenosphere. Plates move by convection currents. 1. Continental Drift theory- plate ...
Earth Structure and Plate Tectonics
... plates push together. ◦ They are also called destructive boundaries because movements along these destroy crust. ...
... plates push together. ◦ They are also called destructive boundaries because movements along these destroy crust. ...
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.