PLATE TECTONICS THEORY
... shape and position. Over time, these tectonic plates move, interact with each other, and are responsible for the formation of ocean basins, mountain ranges, islands, volcanoes, and earthquakes. The theory of plate tectonics is relatively new. In the early 1900s, Alfred Wegener first developed a theo ...
... shape and position. Over time, these tectonic plates move, interact with each other, and are responsible for the formation of ocean basins, mountain ranges, islands, volcanoes, and earthquakes. The theory of plate tectonics is relatively new. In the early 1900s, Alfred Wegener first developed a theo ...
Structure of the Earth
... Climate clues – fossils of warm plants found in the arctic Glacial deposits – grooved marks in bedrock found in SA, Africa, India, and ...
... Climate clues – fossils of warm plants found in the arctic Glacial deposits – grooved marks in bedrock found in SA, Africa, India, and ...
THE CONTINTENTAL DRIFT IDEA
... The impact of the two colliding plates buckles the edge of one or both plates up into a rugged mountain range, and sometimes bends the other down into a deep seafloor trench. A chain of volcanoes often forms parallel to the boundary, to the mountain range, and to the trench. Powerful earthquakes sha ...
... The impact of the two colliding plates buckles the edge of one or both plates up into a rugged mountain range, and sometimes bends the other down into a deep seafloor trench. A chain of volcanoes often forms parallel to the boundary, to the mountain range, and to the trench. Powerful earthquakes sha ...
8.1 Earth has several layers
... • Tectonic plates rest on the asthenosphere (layer of soft, hot rock) • Convection currents within Earth helps to move the plates • convection—the transfer of heat by the movement of a material • convection current—a motion that transfers heat energy to a material • Moves very slowly, a few centimet ...
... • Tectonic plates rest on the asthenosphere (layer of soft, hot rock) • Convection currents within Earth helps to move the plates • convection—the transfer of heat by the movement of a material • convection current—a motion that transfers heat energy to a material • Moves very slowly, a few centimet ...
Plate Tectonics - Mrs. Robbins Earth Science
... • Climate: Fossils and rocks associated with different climates than present can be found in the layers of earth, and resemble those of other continents from a similar time period. ...
... • Climate: Fossils and rocks associated with different climates than present can be found in the layers of earth, and resemble those of other continents from a similar time period. ...
Answer Key - With Teacher Comments given in class Plate
... Event here = earthquakes that can be anywhere from minor to major Evidence for Plate Tectonics _Pangaea___- The name of the single land mass that broke apart 200 million years ago and gave shape to ...
... Event here = earthquakes that can be anywhere from minor to major Evidence for Plate Tectonics _Pangaea___- The name of the single land mass that broke apart 200 million years ago and gave shape to ...
ES Chapter 9 Study Guide
... 2. What does evidence about ancient climates indicate? 3. What evidence does the distribution of the swimming reptile Mesosaurus provide? 4. What is the main reason Wegener’s continental drift hypotheses was rejected? 5. In the plate tectonic theory, the lithosphere is divided into how many major pl ...
... 2. What does evidence about ancient climates indicate? 3. What evidence does the distribution of the swimming reptile Mesosaurus provide? 4. What is the main reason Wegener’s continental drift hypotheses was rejected? 5. In the plate tectonic theory, the lithosphere is divided into how many major pl ...
earth
... • New crust emerges from the rift valley in a mid-ocean ridge. • Magma from the mantle pushes up through the rift and solidifies into new crust. • New seafloor forms at the rift valleys and mid-ocean ridges, spreading away from the ridges until it returns as part of the rock cycle at subduction zone ...
... • New crust emerges from the rift valley in a mid-ocean ridge. • Magma from the mantle pushes up through the rift and solidifies into new crust. • New seafloor forms at the rift valleys and mid-ocean ridges, spreading away from the ridges until it returns as part of the rock cycle at subduction zone ...
Task to i) Explain how continental drift works to move tectonic plates
... the liquid outer core and the solid inner core. ...
... the liquid outer core and the solid inner core. ...
9.4 Testing Plate Tectonics 9.5 Mechanisms of Plate Motions
... • Slab-pull is a mechanism that contributes to plate motion in which cool, dense oceanic crust sinks into the mantle and “pulls” the trailing lithosphere along. It is thought to be the primary downward arm of convective flow in the mantle. • Ridge-push causes oceanic lithosphere to slide down the si ...
... • Slab-pull is a mechanism that contributes to plate motion in which cool, dense oceanic crust sinks into the mantle and “pulls” the trailing lithosphere along. It is thought to be the primary downward arm of convective flow in the mantle. • Ridge-push causes oceanic lithosphere to slide down the si ...
ch7 answers to SG
... 4. What is the evidence for sea-floor spreading? Magnetic Reversal 5. What is the liquid layer of the earth's core called? The Outer Core 6. What is the place where tectonic plates meet called? Boundary 7. What type of boundary is formed when plates collide? Convergent 8. What type of boundary is fo ...
... 4. What is the evidence for sea-floor spreading? Magnetic Reversal 5. What is the liquid layer of the earth's core called? The Outer Core 6. What is the place where tectonic plates meet called? Boundary 7. What type of boundary is formed when plates collide? Convergent 8. What type of boundary is fo ...
Unequal distribution of heat within the Earth cause the movements
... Using the above image, the newest rock can be found at point: a. b. c. d. ...
... Using the above image, the newest rock can be found at point: a. b. c. d. ...
Section 22.4 Plate Tectonics
... 11. Is the following sentence true or false? The concept of sea-floor spreading supports the theory of plate tectonics by providing a way for the pieces of Earth’s crust to move. 12. Heat from Earth’s interior causes convection currents in Earth’s ...
... 11. Is the following sentence true or false? The concept of sea-floor spreading supports the theory of plate tectonics by providing a way for the pieces of Earth’s crust to move. 12. Heat from Earth’s interior causes convection currents in Earth’s ...
Introduction to Plate Tectonics
... Rocks that acquire the polarity of the Earth's magnetic field when they are formed. This is called paleomagnetism. The magnetite in the rocks are the minerals that help the rocks ...
... Rocks that acquire the polarity of the Earth's magnetic field when they are formed. This is called paleomagnetism. The magnetite in the rocks are the minerals that help the rocks ...
Earthquake – violent shaking of the ground
... across the upper mantle convergent boundary – where plates collide/ come together/ move toward each other trench – feature from a type of convergent boundary, the deepest part of the ocean transform boundary – where plates slide past each other, lateral motion, ex. San Andreas Fault in California Di ...
... across the upper mantle convergent boundary – where plates collide/ come together/ move toward each other trench – feature from a type of convergent boundary, the deepest part of the ocean transform boundary – where plates slide past each other, lateral motion, ex. San Andreas Fault in California Di ...
Study Guide - Answers
... _____C____ Divergent past each other horizontally. _____E____ Convergent b. Region where one plate moves under another. c. Boundary between tectonic plates that are moving _____A____ Transform away from each other. d. Undersea mountain range. _____D____ Mid-ocean Ridge e. The boundary b ...
... _____C____ Divergent past each other horizontally. _____E____ Convergent b. Region where one plate moves under another. c. Boundary between tectonic plates that are moving _____A____ Transform away from each other. d. Undersea mountain range. _____D____ Mid-ocean Ridge e. The boundary b ...
Chapter 4: Plate Tectonics
... Evidence from rock samples – Drilling samples – Volcanic eruptions blast rock to the surface ...
... Evidence from rock samples – Drilling samples – Volcanic eruptions blast rock to the surface ...
Presentation
... The theory of plate tectonics was first proposed by Alfred Wegener in 1910. Wegener noticed that the shorelines of the continents seemed to ‘fit together’ like the pieces of a giant jig saw puzzle. Wegener’s theory stated: 1) The continents were once all together in one place forming a supercontinen ...
... The theory of plate tectonics was first proposed by Alfred Wegener in 1910. Wegener noticed that the shorelines of the continents seemed to ‘fit together’ like the pieces of a giant jig saw puzzle. Wegener’s theory stated: 1) The continents were once all together in one place forming a supercontinen ...
Plate Tectonics
... -This action constantly changes the planet, pushing up mountains, creating volcanoes, and producing earthquakes MAGMA-molten rock Plate Tectonics- all activities which create many of the earth’s physical features ...
... -This action constantly changes the planet, pushing up mountains, creating volcanoes, and producing earthquakes MAGMA-molten rock Plate Tectonics- all activities which create many of the earth’s physical features ...
Plate Tectonics
... away from the ridge crust, generating new oceanic crust. • To compensate for the other side of the plate moving, there are deep ocean trenches where the crust is brought back down to the mantle. ...
... away from the ridge crust, generating new oceanic crust. • To compensate for the other side of the plate moving, there are deep ocean trenches where the crust is brought back down to the mantle. ...
Plate Tectonics - Galena Park ISD Moodle
... position of a oceanic ridge system and gravity pushes the lithosphere down and away from the ridge. Slab-pull is most likely the more important force ...
... position of a oceanic ridge system and gravity pushes the lithosphere down and away from the ridge. Slab-pull is most likely the more important force ...
What is the Theory of Plate Tectonics?
... b) O-C: the denser oceanic plate moves under the continental plate (subduction), creating a trench and a volcanic mountain range . One example is the Andes Mountains in South America. c) C-C: forms when an ocean basin between converging oceanic and continental plates is entirely subducted; the resul ...
... b) O-C: the denser oceanic plate moves under the continental plate (subduction), creating a trench and a volcanic mountain range . One example is the Andes Mountains in South America. c) C-C: forms when an ocean basin between converging oceanic and continental plates is entirely subducted; the resul ...
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.