Chapter 9 WS #2
... C. the predicted movement of the magnetic poles in future years D. none of these choices 30. When two continents collide A. one is subducted beneath the other B. neither is completely subducted, but both are thickened and extensively deformed C. earthquakes are rare occurrences D. due to resistance ...
... C. the predicted movement of the magnetic poles in future years D. none of these choices 30. When two continents collide A. one is subducted beneath the other B. neither is completely subducted, but both are thickened and extensively deformed C. earthquakes are rare occurrences D. due to resistance ...
KEY for Tectonics Study Guide #1
... Use this “key” to check the answers on your study guide. Remember, answers do not need to match word-for-word, but the ideas should be the same. Your answer should have the same level of detail that the key shows, too. Goal 1: Describe the Shrinking Earth Theory. Explain how new ideas and technology ...
... Use this “key” to check the answers on your study guide. Remember, answers do not need to match word-for-word, but the ideas should be the same. Your answer should have the same level of detail that the key shows, too. Goal 1: Describe the Shrinking Earth Theory. Explain how new ideas and technology ...
Integrated Science One
... approximately 200 million years ago in a supercontinent called Pangaea. • This theory is called continental drift ...
... approximately 200 million years ago in a supercontinent called Pangaea. • This theory is called continental drift ...
Plate Tectonics 2
... now: plates are mostly ‘self-propelled’ by pull from sinking slabs at subduction zones this is why ocean plates move much faster than continents hot, flowing mantle and ‘weak’ plate boundaries make this possible: as Earth cools further plate tectonics will stop ...
... now: plates are mostly ‘self-propelled’ by pull from sinking slabs at subduction zones this is why ocean plates move much faster than continents hot, flowing mantle and ‘weak’ plate boundaries make this possible: as Earth cools further plate tectonics will stop ...
Part B Continental Drift Slide Show
... At the mid ocean ridges, magma erupts between the two plates, forcing the two plates apart and creating mid-oceanic mountain ridges as it cools and solidifies. At the mid-oceanic ridges new crust is created. But Earth’s crust is in balance, so that as new crustal material is created, old crust is “ ...
... At the mid ocean ridges, magma erupts between the two plates, forcing the two plates apart and creating mid-oceanic mountain ridges as it cools and solidifies. At the mid-oceanic ridges new crust is created. But Earth’s crust is in balance, so that as new crustal material is created, old crust is “ ...
Geosphere in Motion Pre-Post Test
... Study Guide: The Dynamic Earth Part I Directions: Decide if the underlined words in each statement is T or F; correct if F. _____ 1. When tectonic plates collide, a rift valley forms. (E3.3A) _____ 2. Subducting oceanic lithosphere pulls the rest of the plate along with it. (E3.3B) _____ 3. The chai ...
... Study Guide: The Dynamic Earth Part I Directions: Decide if the underlined words in each statement is T or F; correct if F. _____ 1. When tectonic plates collide, a rift valley forms. (E3.3A) _____ 2. Subducting oceanic lithosphere pulls the rest of the plate along with it. (E3.3B) _____ 3. The chai ...
Fig. 1
... the process of subduction. In regions where plates converge, one lithospheric plate is forced down into the mantle beneath the other plate. These zones of subduction are visible on the seafloor as deep ocean trenches. They are seismically active areas characterized by shallow-, intermediate-, and de ...
... the process of subduction. In regions where plates converge, one lithospheric plate is forced down into the mantle beneath the other plate. These zones of subduction are visible on the seafloor as deep ocean trenches. They are seismically active areas characterized by shallow-, intermediate-, and de ...
Passing Plates I - The Theory By Trista L
... softer layer called the asthenosphere. The asthenosphere is made up of a mixture of gases. These plates would move in relation to each other above hotter deeper zones. Along the boundaries of these shifting plates you have some of the world's most active volcanoes or plate-boundary volcanoes. ...
... softer layer called the asthenosphere. The asthenosphere is made up of a mixture of gases. These plates would move in relation to each other above hotter deeper zones. Along the boundaries of these shifting plates you have some of the world's most active volcanoes or plate-boundary volcanoes. ...
THE DYNAMIC CRUST There are 4 major sub
... asthenosphere in a manner that would bring material from the mantle up to the crust 3. The sea floor is spreading out from MARRS - the age of the floor supports this idea 4. Molten material from the asthenosphere is oozing up through a crack (rift or tear) in the Atlantic Ocean floor - direct obser ...
... asthenosphere in a manner that would bring material from the mantle up to the crust 3. The sea floor is spreading out from MARRS - the age of the floor supports this idea 4. Molten material from the asthenosphere is oozing up through a crack (rift or tear) in the Atlantic Ocean floor - direct obser ...
Plate Boundaries
... Subduction zone Trench Area of melting Area of volcanism Arrows indicating direction of plate movement ...
... Subduction zone Trench Area of melting Area of volcanism Arrows indicating direction of plate movement ...
Plate Tectonics
... To the seafloor……Ideas of Harry Hess Location of mid-ocean ridges, deep sea trenches age of seafloor ...
... To the seafloor……Ideas of Harry Hess Location of mid-ocean ridges, deep sea trenches age of seafloor ...
Seafloor Spreading
... The _____________________________ the most extensive chain of mountains on earth, but more than ________________ of this mountain range lies in the deep ocean. The midocean ridge wraps around the globe for more than 65,000 km like the seam of a baseball. 2. ____________________________ – Rocks that ...
... The _____________________________ the most extensive chain of mountains on earth, but more than ________________ of this mountain range lies in the deep ocean. The midocean ridge wraps around the globe for more than 65,000 km like the seam of a baseball. 2. ____________________________ – Rocks that ...
The Dynamic Earth Name
... “If the Earth's crust was expanding along the oceanic ridges”then what MUST be happening elsewhere? ...
... “If the Earth's crust was expanding along the oceanic ridges”then what MUST be happening elsewhere? ...
theory of Plate Tectonics ppt
... seemed to me unlikely to happen if the Earth were solid to the center. I therefore imagined that the internal parts might be a fluid more dense, and of greater specific gravity than any of the solids we are acquainted with, which therefore might swim in or upon the fluid. Thus the surface of the Ear ...
... seemed to me unlikely to happen if the Earth were solid to the center. I therefore imagined that the internal parts might be a fluid more dense, and of greater specific gravity than any of the solids we are acquainted with, which therefore might swim in or upon the fluid. Thus the surface of the Ear ...
How do you think it formed?
... -Made up of rock that is solid. -Farther down is hot enough to flow like putty. ...
... -Made up of rock that is solid. -Farther down is hot enough to flow like putty. ...
File
... In a process called sea floor spreading, molten rock forces its way upward through cracks, or rifts. The molten rock hardens into new oceanic crust. ...
... In a process called sea floor spreading, molten rock forces its way upward through cracks, or rifts. The molten rock hardens into new oceanic crust. ...
Plate Boundaries, evidence to support Plate Tectonics, Mechanisms
... b. continental crust, by comparison, has been found up to 3,900 m.a. D. Hot spots—explanation of the data, within framework of plate tectonics model ...
... b. continental crust, by comparison, has been found up to 3,900 m.a. D. Hot spots—explanation of the data, within framework of plate tectonics model ...
Plate Tectonics - NagelBeelmanScience
... occurred. However the theory of a ‘super continent’ originally was not accepted by scientists. Continental drift was being discussed during the time Wegener introduced his Pangaea theory. ...
... occurred. However the theory of a ‘super continent’ originally was not accepted by scientists. Continental drift was being discussed during the time Wegener introduced his Pangaea theory. ...
A Living Planet Internal Forces Shaping the Earth
... The Ring of Fire is a zone formed around the rim of the Pacific Ocean, it is the location of the vast majority of active volcanoes in the ...
... The Ring of Fire is a zone formed around the rim of the Pacific Ocean, it is the location of the vast majority of active volcanoes in the ...
geology unit test - Sonoma Valley High School
... What are two pieces of evidence that helped to prove the theory of continental drift? What was the super-continent called in the continental drift theory? (Pangaea) What evidence was used to form the plate tectonics theory? How does Continental Drift and Plate Tectonics differ? What is the ...
... What are two pieces of evidence that helped to prove the theory of continental drift? What was the super-continent called in the continental drift theory? (Pangaea) What evidence was used to form the plate tectonics theory? How does Continental Drift and Plate Tectonics differ? What is the ...
It`s easy! Each plate is named after the major land mass
... 6 Major Tectonic Plates on Earth Earth has many tectonic plates - like a giant jigsaw puzzle. The largest 6 plates are called the major plates. Your job is to know the names and locations of the 6 major plates. (It's easy! You will see how the names of the plates match up to the names of Earth's co ...
... 6 Major Tectonic Plates on Earth Earth has many tectonic plates - like a giant jigsaw puzzle. The largest 6 plates are called the major plates. Your job is to know the names and locations of the 6 major plates. (It's easy! You will see how the names of the plates match up to the names of Earth's co ...
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.