CH. 15 CONCEPT CHECKS
... 5. How did Wegener account for the existence of glaciers in the southern landmasses at a time when areas in North America, Europe, and Asia supported lush tropical swamps? ...
... 5. How did Wegener account for the existence of glaciers in the southern landmasses at a time when areas in North America, Europe, and Asia supported lush tropical swamps? ...
Plate Tectonics - NagelBeelmanScience
... Boundaries: Location were plates are moving away from each other. Examples: Earthquakes, volcanoes. Example of Divergent Boundaries and continental plates involved: Volcanoes: Rising current pushes up on the bottom of the lithosphere, lifting it and flowing beneath it. The lateral flow causes th ...
... Boundaries: Location were plates are moving away from each other. Examples: Earthquakes, volcanoes. Example of Divergent Boundaries and continental plates involved: Volcanoes: Rising current pushes up on the bottom of the lithosphere, lifting it and flowing beneath it. The lateral flow causes th ...
Introduction to Earth System
... The astenosphere viscosity is low enough to allow on long time scale for viscous flow; The generation of new plate material occurs by sea floor spreading; The new oceanic lithosphere form part of a rigid plate that may or may not include continental material; Earth’s surface area remains con ...
... The astenosphere viscosity is low enough to allow on long time scale for viscous flow; The generation of new plate material occurs by sea floor spreading; The new oceanic lithosphere form part of a rigid plate that may or may not include continental material; Earth’s surface area remains con ...
Gravity Summary - uni
... The astenosphere viscosity is low enough to allow on long time scale for viscous flow; The generation of new plate material occurs by sea floor spreading; The new oceanic lithosphere form part of a rigid plate that may or may not include continental material; Earth’s surface area remains constan ...
... The astenosphere viscosity is low enough to allow on long time scale for viscous flow; The generation of new plate material occurs by sea floor spreading; The new oceanic lithosphere form part of a rigid plate that may or may not include continental material; Earth’s surface area remains constan ...
Document
... Oceanic plate is denser than a continental plate so it subducts under the continental plate. At mid ocean ridges two oceanic plates are moving away from one another so they will not subduct. 19. Identifying Relationships New tectonic material continually forms at divergent boundaries. Tectonic plate ...
... Oceanic plate is denser than a continental plate so it subducts under the continental plate. At mid ocean ridges two oceanic plates are moving away from one another so they will not subduct. 19. Identifying Relationships New tectonic material continually forms at divergent boundaries. Tectonic plate ...
Slideshow
... www.geology.com Two plates that are sliding past each other will create earthquakes and faults. ...
... www.geology.com Two plates that are sliding past each other will create earthquakes and faults. ...
Quadratic Functions
... Plate tectonics is the motion of the outer part of the earth called the lithosphere. The lithosphere is comprised of the earth’s crust and upper part of the mantel. Currently, it is thought that there are 8 major plates and many minor plates that are moving across the surface of the earth. The cause ...
... Plate tectonics is the motion of the outer part of the earth called the lithosphere. The lithosphere is comprised of the earth’s crust and upper part of the mantel. Currently, it is thought that there are 8 major plates and many minor plates that are moving across the surface of the earth. The cause ...
Plate Tectonics Study Guide: Answer key
... of plates called the lithosphere, these plates slide on the asthenosphere which is soft and tar like. ...
... of plates called the lithosphere, these plates slide on the asthenosphere which is soft and tar like. ...
PowerPoint Presentation - How and why does subduction occur?
... How and why does subduction occur? Convergence One plate sinks beneath the other Dense oceanic crust sinks into mantle ...
... How and why does subduction occur? Convergence One plate sinks beneath the other Dense oceanic crust sinks into mantle ...
The Theory of Plate Tectonics
... Magnetic Stripes – Iron Particles show poles reversals creating similar pattern on both sides of the M-O-R ...
... Magnetic Stripes – Iron Particles show poles reversals creating similar pattern on both sides of the M-O-R ...
Lecture 10 Plate Tectonics i
... Seafloor spreading in detail Harry Hess: Convection currents in mantle Seafloor spreading occurs along relatively narrow zones, called rift zones, located at the crests of ocean ridges As plates pulled apart, low pressure causes mantle mellting,magma moves into fractures and makes new oceanic litho ...
... Seafloor spreading in detail Harry Hess: Convection currents in mantle Seafloor spreading occurs along relatively narrow zones, called rift zones, located at the crests of ocean ridges As plates pulled apart, low pressure causes mantle mellting,magma moves into fractures and makes new oceanic litho ...
Name - www .alexandria .k12 .mn .us
... 8. Plate Tectonics Theory has been widely accepted since the ___________’s. It states that Earth’s outer layer or _________________ is broken up into ________________. These plates hold ______________________ and _____________________. They are constantly __________________________. 9. Click on “Con ...
... 8. Plate Tectonics Theory has been widely accepted since the ___________’s. It states that Earth’s outer layer or _________________ is broken up into ________________. These plates hold ______________________ and _____________________. They are constantly __________________________. 9. Click on “Con ...
Continental Drift
... – PLATE TECTONICS – surface of earth composed of “plates” (LITHOSPHERE) that move on a “conveyor belt” (ASTHENOSPHERE) ...
... – PLATE TECTONICS – surface of earth composed of “plates” (LITHOSPHERE) that move on a “conveyor belt” (ASTHENOSPHERE) ...
plate tectonics - Moore Middle School
... Plate Tectonics is the geological theory that states that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle. The theory of plate tectonics explains the formation, movement, and subduction of Earth’s plates ...
... Plate Tectonics is the geological theory that states that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle. The theory of plate tectonics explains the formation, movement, and subduction of Earth’s plates ...
Scientists contribution to early Ideas of Plate Tectonics
... basins and continents were fixed. During the past 70 years these ideas have brought about a scientific revolution in which new evidence and data support a slowly but continually moving planet. It was not until 1968 that a theory called Plate Tectonics provided reliable evidence supporting a mobile ...
... basins and continents were fixed. During the past 70 years these ideas have brought about a scientific revolution in which new evidence and data support a slowly but continually moving planet. It was not until 1968 that a theory called Plate Tectonics provided reliable evidence supporting a mobile ...
Plate tectonics, tsunamis, volcanoes, and seasons
... Present day tropical regions once had polar climates ...
... Present day tropical regions once had polar climates ...
Name
... Evidence of the Wegener’s Continental Drift Hypothesis and The Theory of Plate Tectonics The Theory of Plate Tectonics: 1. The Earth’s lithosphere is divided into tectonic plates that drift on the asthenosphere 2. The plates move by convection currents that either push the plates together, apart or ...
... Evidence of the Wegener’s Continental Drift Hypothesis and The Theory of Plate Tectonics The Theory of Plate Tectonics: 1. The Earth’s lithosphere is divided into tectonic plates that drift on the asthenosphere 2. The plates move by convection currents that either push the plates together, apart or ...
Document
... • Magma rising along the mid oceanic ridge exerts a force that pushes an oceanic plate away from the ridge. • The force of gravity causes plate movement by pulling cooler, denser oceanic plates down toward the mantle. • Slab push and pull work together with convection currents to move the plates. ...
... • Magma rising along the mid oceanic ridge exerts a force that pushes an oceanic plate away from the ridge. • The force of gravity causes plate movement by pulling cooler, denser oceanic plates down toward the mantle. • Slab push and pull work together with convection currents to move the plates. ...
1. There is a link between WHY they occur and - DP
... that, as basaltic magma rises to form new ocean floor at a mid-ocean spreading center, it records the polarity of the magnetic field existing at the time magma crystallized. As spreading pulls the new oceanic crust apart, stripes of approximately the same size should be carried away from the ridge o ...
... that, as basaltic magma rises to form new ocean floor at a mid-ocean spreading center, it records the polarity of the magnetic field existing at the time magma crystallized. As spreading pulls the new oceanic crust apart, stripes of approximately the same size should be carried away from the ridge o ...
Layers of the Earth, Continental Drift, and Plate Tectonic Overview
... 2. How is the lithosphere different from the asthenosphere? 3. How do scientists know about the structure of the Earth's interior? Explain. 4. Explain the difference between the crust and the lithosphere. 5. List three puzzling occurrences that the theory of continental drift helped to explain, and ...
... 2. How is the lithosphere different from the asthenosphere? 3. How do scientists know about the structure of the Earth's interior? Explain. 4. Explain the difference between the crust and the lithosphere. 5. List three puzzling occurrences that the theory of continental drift helped to explain, and ...
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.