Exemplar: Describe the theory of Plate Tectonics Claim: The theory
... Henry Hess discovered mid-ocean ridges, where divergent boundaries occur and spread the sea floor. Then scientist realized that heat was rising up from the core of the Earth causing convection currents to occur in the asthenosphere (mantle). This current moved the different tectonic plates. At plate ...
... Henry Hess discovered mid-ocean ridges, where divergent boundaries occur and spread the sea floor. Then scientist realized that heat was rising up from the core of the Earth causing convection currents to occur in the asthenosphere (mantle). This current moved the different tectonic plates. At plate ...
Plate Tectonics
... Most of the mountains in the mid-ocean ridge lie hidden under hundreds of meters of water. Hess proposed that the ocean floors move, carrying the continents along with them. The movement begins at the mid-ocean ridge. At the mid-ocean ridge, molten material rises from the mantle and erupts. ...
... Most of the mountains in the mid-ocean ridge lie hidden under hundreds of meters of water. Hess proposed that the ocean floors move, carrying the continents along with them. The movement begins at the mid-ocean ridge. At the mid-ocean ridge, molten material rises from the mantle and erupts. ...
Plate Tectonic Vocabulary
... -Boundary along which two tectonic plates move toward each other -Characterized by subduction or continental collision -Crust is usually destroyed ...
... -Boundary along which two tectonic plates move toward each other -Characterized by subduction or continental collision -Crust is usually destroyed ...
Study Guide - TeacherWeb
... Study Guide Dynamic Earth/Plate Tectonics The following is a list of questions that will help you study for the test. Students who take the time to look up each answer should do well. ...
... Study Guide Dynamic Earth/Plate Tectonics The following is a list of questions that will help you study for the test. Students who take the time to look up each answer should do well. ...
Plate Tectonics
... Write the letter of the correct answer on the line at the left. (1 point each) _____ 1. Scientists rejected Wegener’s theory because he could not a. explain why continental crust was denser that oceanic crust b. describe the climate of Pangaea c. explain what force pushes or pulls continents d. desc ...
... Write the letter of the correct answer on the line at the left. (1 point each) _____ 1. Scientists rejected Wegener’s theory because he could not a. explain why continental crust was denser that oceanic crust b. describe the climate of Pangaea c. explain what force pushes or pulls continents d. desc ...
Notes: Plate Tectonics - Riverdale Middle School
... cause plate tectonics – the cycle of heating, rising, cooling, and sinking of material inside Earth ...
... cause plate tectonics – the cycle of heating, rising, cooling, and sinking of material inside Earth ...
Study Guide
... 9. A. Ridge push and slab pull hypothesis: as new ocean crust moves away from the ridge, it cools, increases in density and eventually descends, pulling the trailing lithosphere along ...
... 9. A. Ridge push and slab pull hypothesis: as new ocean crust moves away from the ridge, it cools, increases in density and eventually descends, pulling the trailing lithosphere along ...
Plate Teconics Study Guide
... 5. What provides us with knowledge about the interior of the earth? 6. What is evidence of sea-floor spreading? 7. What forces cause the earth’s plates to move? 8. Give an example of each type of tectonic plate boundary and where we see them? 9. Approximately how far do plates move each year? 10. Na ...
... 5. What provides us with knowledge about the interior of the earth? 6. What is evidence of sea-floor spreading? 7. What forces cause the earth’s plates to move? 8. Give an example of each type of tectonic plate boundary and where we see them? 9. Approximately how far do plates move each year? 10. Na ...
Plate Tectonic Terms
... caused by earthquakes, and earthquakes are likely to reoccur on pre-existing faults. 4. Lithosphere - outer solid part of the earth, including the crust and uppermost mantle. The lithosphere is about 100 km thick, although its thickness is age dependent (older lithosphere is thicker). 5. Mid-Ocean R ...
... caused by earthquakes, and earthquakes are likely to reoccur on pre-existing faults. 4. Lithosphere - outer solid part of the earth, including the crust and uppermost mantle. The lithosphere is about 100 km thick, although its thickness is age dependent (older lithosphere is thicker). 5. Mid-Ocean R ...
Plate Tectonics (Chap. 3)
... Mantle: composed of Fe/Mg- rich silicates (olivine, pyroxene) Crust: continental – 20–90 km thick (old) Ocean crust- 5–10 km thick (young) Lithosphere: crust + upper mantle = “Plates” Asthenosphere: partially molten upper mantle Mantle: convection due to radioactive heating 3 types of plate boundary ...
... Mantle: composed of Fe/Mg- rich silicates (olivine, pyroxene) Crust: continental – 20–90 km thick (old) Ocean crust- 5–10 km thick (young) Lithosphere: crust + upper mantle = “Plates” Asthenosphere: partially molten upper mantle Mantle: convection due to radioactive heating 3 types of plate boundary ...
The Theory of Plate Tectonics Homework
... 4. Describe what happens when (a) two plates carrying oceanic crust collide, (b) two plates carrying continental crust collide, and (c) a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent ...
... 4. Describe what happens when (a) two plates carrying oceanic crust collide, (b) two plates carrying continental crust collide, and (c) a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent ...
File - Science Source
... 7. Describe what happens when a plate carrying oceanic crust collides with a plate carrying continental crust. ...
... 7. Describe what happens when a plate carrying oceanic crust collides with a plate carrying continental crust. ...
Name - Cedar Hill ISD
... 15. The oceanic plate is SUBDUCTED below the continental plate in a convergent boundary because the oceanic plate is MORE dense then the continental plate. When this happens, the oceanic plate returns to the MANTLE. 16. Why does subduction not occur when two continental plates converge? THEY ARE THE ...
... 15. The oceanic plate is SUBDUCTED below the continental plate in a convergent boundary because the oceanic plate is MORE dense then the continental plate. When this happens, the oceanic plate returns to the MANTLE. 16. Why does subduction not occur when two continental plates converge? THEY ARE THE ...
Plate Tectonic Notes Layer of Earth 1. inner core
... 4. To support the theory of continental drift Wegener used the similar rocks and similar fossils found on different continents ! 5. Early studies of the ocean floor helped develop the theory of plate tectonics because the age of oceanic crust increases with distance from the mid-ocean ridge.! 6. Pl ...
... 4. To support the theory of continental drift Wegener used the similar rocks and similar fossils found on different continents ! 5. Early studies of the ocean floor helped develop the theory of plate tectonics because the age of oceanic crust increases with distance from the mid-ocean ridge.! 6. Pl ...
Plate Boundaries - Learn Earth Science
... Theory of Continental Drift? • Alfred Wegner, 1915 • The continents were once a super-continent called Pangea • the continents are plowing through the ocean floors---most people didn’t believe this ...
... Theory of Continental Drift? • Alfred Wegner, 1915 • The continents were once a super-continent called Pangea • the continents are plowing through the ocean floors---most people didn’t believe this ...
Plate Boundaries
... Theory of Continental Drift? • Alfred Wegner, 1915 • The continents were once a super-continent called Pangea • the continents are plowing through the ocean floors---most people didn’t believe this ...
... Theory of Continental Drift? • Alfred Wegner, 1915 • The continents were once a super-continent called Pangea • the continents are plowing through the ocean floors---most people didn’t believe this ...
The Theory of Plate Tectonics
... 4. Describe what happens when (a) two plates carrying oceanic crust collide, (b) two plates carrying continental crust collide, and (c) a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent ...
... 4. Describe what happens when (a) two plates carrying oceanic crust collide, (b) two plates carrying continental crust collide, and (c) a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent ...
Continental Drift - Frost Middle School
... • In the 1960’s scientists really started studying the sea floor • Found underwater mountain ranges • Called mid-ocean ridges • Found in every ocean • Seemed to circle the Earth like the seams of a baseball • Sea-floor Spreading • Where the ridges form • Cracks in the crust where molten rock rises, ...
... • In the 1960’s scientists really started studying the sea floor • Found underwater mountain ranges • Called mid-ocean ridges • Found in every ocean • Seemed to circle the Earth like the seams of a baseball • Sea-floor Spreading • Where the ridges form • Cracks in the crust where molten rock rises, ...
Quiz
... In the space provided, write the letter of the term or phrase that best matches each description. ...
... In the space provided, write the letter of the term or phrase that best matches each description. ...
1-5 Review and Reinforce
... 4. Describe what happens when a. two plates carrying oceanic crust collide, b. two plates carrying continental crust collide, and c. a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent to ...
... 4. Describe what happens when a. two plates carrying oceanic crust collide, b. two plates carrying continental crust collide, and c. a plate carrying oceanic crust collides with a plate carrying continental crust. 5. Explain what force caused the movement of the continents from one supercontinent to ...
Chapter 10-11 Study Notes
... • ________ patterns on the ocean floor were puzzling because they showed alternating bands of ______ and _______ ...
... • ________ patterns on the ocean floor were puzzling because they showed alternating bands of ______ 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.