Lecture 3 - Introduction to Plate Tectonics
... high elevation • Green to blue shows lower elevation • Latitude 9° north ...
... high elevation • Green to blue shows lower elevation • Latitude 9° north ...
Introduction to Plate Tectonics
... high elevation • Green to blue shows lower elevation • Latitude 9° north ...
... high elevation • Green to blue shows lower elevation • Latitude 9° north ...
Lecture 3 - Introduction to Plate Tectonics
... high elevation • Green to blue shows lower elevation • Latitude 9° north ...
... high elevation • Green to blue shows lower elevation • Latitude 9° north ...
Introduction to Plate Tectonics - FAU
... high elevation • Green to blue shows lower elevation • Latitude 9° north ...
... high elevation • Green to blue shows lower elevation • Latitude 9° north ...
Earth`s Surface and Layers Notes
... Theory: a carefully-built set of ideas based on evidence that explains many scientific observations ...
... Theory: a carefully-built set of ideas based on evidence that explains many scientific observations ...
Document
... Alfred Wegener: German meteorologist, passionate champion of the hypothesis of continental drift, amassed copious data in support but failed to provide an adequate and acceptable mechanism, rejected by contemporaries, died in Greenland on an expedition to (in part) seek more supporting data for CD A ...
... Alfred Wegener: German meteorologist, passionate champion of the hypothesis of continental drift, amassed copious data in support but failed to provide an adequate and acceptable mechanism, rejected by contemporaries, died in Greenland on an expedition to (in part) seek more supporting data for CD A ...
Plate tectonics - pams
... Ocean floor is being destroyed in trenches through subduction where oceanic crust slides under continental crust. The denser ocean crust is pushed downward into the mantle and melts ...
... Ocean floor is being destroyed in trenches through subduction where oceanic crust slides under continental crust. The denser ocean crust is pushed downward into the mantle and melts ...
Dynamic Earth Interactive: Plate Tectonics Grade 8 Earth Science
... 11. According to plate tectonics theory Earth’s outer layer, the __________________, is broken into several large __________________, which hold the continents and the oceans, and are in constant motion. 12. Plate tectonics theory explains how ____________________________________, __________________ ...
... 11. According to plate tectonics theory Earth’s outer layer, the __________________, is broken into several large __________________, which hold the continents and the oceans, and are in constant motion. 12. Plate tectonics theory explains how ____________________________________, __________________ ...
Fourth lecture - 16 September, 2015
... through the sea floor. The leading physicists of his day, however, were able to show that this was physically not possible. The proposed mechanism was thus discredited, so the entire hypothesis was set aside (by most!) as yet more wishful thinking. ...
... through the sea floor. The leading physicists of his day, however, were able to show that this was physically not possible. The proposed mechanism was thus discredited, so the entire hypothesis was set aside (by most!) as yet more wishful thinking. ...
Plate tectonics 2 - PAMS
... found underwater mountain chains with rift valleys in their centers ...
... found underwater mountain chains with rift valleys in their centers ...
Chapter 12 Thermal Energy Transfer Drives Plate Tectonics 12.1
... climates, (eg. Such as ___________________) on warm continents. Act. 12-1C – Piecing Together Pangaea 2. How Can Continents Move? • Wegener’s evidence for continental drift did ___________________ New scientific equipment _________________. It was noted that ___________________ appear in certain ...
... climates, (eg. Such as ___________________) on warm continents. Act. 12-1C – Piecing Together Pangaea 2. How Can Continents Move? • Wegener’s evidence for continental drift did ___________________ New scientific equipment _________________. It was noted that ___________________ appear in certain ...
Unit Three Review Guide: Plate Tectonics
... 2. How does the age of oceanic crust change the further it gets from the mid-ocean ridge? 3. Explain the relationship between normal polarity, reversed polarity, magnetic reversal, and the evidence for seafloor spreading. 4. What theory does ‘sea-floor spreading’ support? (hint: what is being moved ...
... 2. How does the age of oceanic crust change the further it gets from the mid-ocean ridge? 3. Explain the relationship between normal polarity, reversed polarity, magnetic reversal, and the evidence for seafloor spreading. 4. What theory does ‘sea-floor spreading’ support? (hint: what is being moved ...
Continental Drift
... – Subduction zone – oceanic sinks under continental – Magma rises to surface and forms volcanic mountains ...
... – Subduction zone – oceanic sinks under continental – Magma rises to surface and forms volcanic mountains ...
Chapter 7 Vocabulary List
... some region extends as deep as 700 kilometers. The rock within this zone is easily deformed. 2. Continental drift theory- A theory that originally proposed that the continents are rafted about. It has essentially been replaced by the plate tectonics theory 3. Continental volcanic arc- Mountains form ...
... some region extends as deep as 700 kilometers. The rock within this zone is easily deformed. 2. Continental drift theory- A theory that originally proposed that the continents are rafted about. It has essentially been replaced by the plate tectonics theory 3. Continental volcanic arc- Mountains form ...
Ch.4 Notes
... Asthenosphere flows upward to fill in Mid-ocean ridge Rift valley – center of plate boundary Red sea is one ...
... Asthenosphere flows upward to fill in Mid-ocean ridge Rift valley – center of plate boundary Red sea is one ...
Plate Tectonics
... in the Earth's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was in ...
... in the Earth's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was in ...
Document
... in the Earth's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was in ...
... in the Earth's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was in ...
Document
... • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming ___________ • E.g. _____ _________ Source: Your Planet Earth ...
... • Oceanic lithosphere heats and dehydrates as it subsides • The melt rises forming ___________ • E.g. _____ _________ Source: Your Planet Earth ...
Plate Tectonics
... will summarize the theory of plate tectonics. I will identify and describe the three types of plate boundaries. I will list and describe three causes of plate movement. ...
... will summarize the theory of plate tectonics. I will identify and describe the three types of plate boundaries. I will list and describe three causes of plate movement. ...
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.