Earth`s Surface
... Approximately 4.5 billion years ago, the Earth and the solar system began to form from clouds of dust that resulted from the Big Bang. Scientists estimate that the Big Bang, which is thought to have been a great cosmic explosion of matter and energy from a single point, occurred about 13.7 billion y ...
... Approximately 4.5 billion years ago, the Earth and the solar system began to form from clouds of dust that resulted from the Big Bang. Scientists estimate that the Big Bang, which is thought to have been a great cosmic explosion of matter and energy from a single point, occurred about 13.7 billion y ...
Geology Unit Review - Bennatti
... The test will cover the entire geology unit including plate tectonics, earthquakes, the structure of the Earth, rocks and minerals, the influence of the last ice age on the Maine landscape and other topics covered in this unit. Go over each of your handouts (paying careful attention to questions tha ...
... The test will cover the entire geology unit including plate tectonics, earthquakes, the structure of the Earth, rocks and minerals, the influence of the last ice age on the Maine landscape and other topics covered in this unit. Go over each of your handouts (paying careful attention to questions tha ...
Plate Tectonics
... volcanoes. On contact with seawater it cools quickly forming a solid skin that is broken by more lava. This has the effect of producing a series of "blobs". As the new oceanic crust slowly moves away from the ridge, it becomes colder and denser. Exercise 7 What is the proper name for these igneous f ...
... volcanoes. On contact with seawater it cools quickly forming a solid skin that is broken by more lava. This has the effect of producing a series of "blobs". As the new oceanic crust slowly moves away from the ridge, it becomes colder and denser. Exercise 7 What is the proper name for these igneous f ...
Plate Tectonics
... Plate tectonics=The Earth's surface is made up of moving plates According to this theory, the Earth's crust….. is made up of about a dozen plates, some are little and others ...
... Plate tectonics=The Earth's surface is made up of moving plates According to this theory, the Earth's crust….. is made up of about a dozen plates, some are little and others ...
Section 9.3 Actions at Plate Boundaries
... topics and the blue headings as subtopics. As you read, add supporting details. For more information on this Reading Strategy, see the Reading and Study Skills in the Skills and Reference Handbook at the end of your textbook. Actions at Boundaries I. Divergent Boundaries ...
... topics and the blue headings as subtopics. As you read, add supporting details. For more information on this Reading Strategy, see the Reading and Study Skills in the Skills and Reference Handbook at the end of your textbook. Actions at Boundaries I. Divergent Boundaries ...
Continental Drift Powerpoint
... Wegener’s idea was ridiculed by geologists This is because while Wegener could provide evidence, he couldn’t provide an actual mechanism – an Earth PROCESS – that could cause huge land masses to move across the globe However, new technology finally led to findings to support Wegener’s theory U ...
... Wegener’s idea was ridiculed by geologists This is because while Wegener could provide evidence, he couldn’t provide an actual mechanism – an Earth PROCESS – that could cause huge land masses to move across the globe However, new technology finally led to findings to support Wegener’s theory U ...
Presentation
... and the Americas, are Jurassic in age, showing the time of formation of the Atlantic Ocean. ...
... and the Americas, are Jurassic in age, showing the time of formation of the Atlantic Ocean. ...
Chapter 7 Section 2 Pages 198-201
... and the Americas, are Jurassic in age, showing the time of formation of the Atlantic Ocean. ...
... and the Americas, are Jurassic in age, showing the time of formation of the Atlantic Ocean. ...
"Inside Earth" Chapter 1 Section 5
... *The Theory of Plate Tectonics explains the formation, movement, and subduction of Earth’s plates. * Convection currents in the mantle move the plates. As they move, they collide, pull apart, or grind past each other. Plate Boundaries * Faults are breaks in Earth’s crust where rocks have slipped pas ...
... *The Theory of Plate Tectonics explains the formation, movement, and subduction of Earth’s plates. * Convection currents in the mantle move the plates. As they move, they collide, pull apart, or grind past each other. Plate Boundaries * Faults are breaks in Earth’s crust where rocks have slipped pas ...
02-Plate-Tectonics
... http://www.physics.mcgill.ca/~crawford/PSG/PSG12/204_97_L12.2_earthxn.html January 24, 2008 ...
... http://www.physics.mcgill.ca/~crawford/PSG/PSG12/204_97_L12.2_earthxn.html January 24, 2008 ...
7.3 Theory of Plate Tectonics
... ocean crust sinks into the mantle. Subduction- process by which ocean crust sinks beneath a deep-ocean trench and back into the mantle ...
... ocean crust sinks into the mantle. Subduction- process by which ocean crust sinks beneath a deep-ocean trench and back into the mantle ...
Plate Tectonics
... each other • Earthquakes, forms mountain ranges & trenches • Ex) Himalayan Mountains ...
... each other • Earthquakes, forms mountain ranges & trenches • Ex) Himalayan Mountains ...
exam_1
... 32. Which of the following is NOT true about passive continental margins? A. They have little seismic or volcanic activity. B. They form after continents are rifted apart. C. They tend to be wider than active margins. D. They occur away from plate boundaries. E. They are commonly at subduction zones ...
... 32. Which of the following is NOT true about passive continental margins? A. They have little seismic or volcanic activity. B. They form after continents are rifted apart. C. They tend to be wider than active margins. D. They occur away from plate boundaries. E. They are commonly at subduction zones ...
ch07 (1) - earthjay science
... 11. Alfred Wegener might have cited the following evidence in support of his ideas on continental motion: geological similarities of India, Africa, and South America; the geographic fit of the continents; similar climates of parts indicated in widely separated areas; evidence that some areas at low ...
... 11. Alfred Wegener might have cited the following evidence in support of his ideas on continental motion: geological similarities of India, Africa, and South America; the geographic fit of the continents; similar climates of parts indicated in widely separated areas; evidence that some areas at low ...
Unit Six Notes
... pattern of earthquakes as an ocean plate grinds down the underneath side of a continent) ...
... pattern of earthquakes as an ocean plate grinds down the underneath side of a continent) ...
Earth*s Layers notes Part 2
... moving in opposite directions or away from each other. Two main things that occur at this type of plate boundary is sea floor spreading and rift valleys. Sea floor spreading creates new sea floor and rift valleys make huge valleys in the earth that will sometimes fill up with water to create large l ...
... moving in opposite directions or away from each other. Two main things that occur at this type of plate boundary is sea floor spreading and rift valleys. Sea floor spreading creates new sea floor and rift valleys make huge valleys in the earth that will sometimes fill up with water to create large l ...
PLATE TECTONICS REVIEW SHEET Write rock or metal to indicate
... 16. What happens along the Ring of Fire and what type of boundary is to blame? _Volcanic Eruptions caused by convergent plate boundaries with subduction.___________________________________________________ 17. The North American plate is diverging from the Eurasian plate. What is happening to the Atl ...
... 16. What happens along the Ring of Fire and what type of boundary is to blame? _Volcanic Eruptions caused by convergent plate boundaries with subduction.___________________________________________________ 17. The North American plate is diverging from the Eurasian plate. What is happening to the Atl ...
Bell ringer- How do plate tectonics keep Earth inhabitable?
... poles of Earth & harden in the rock as it cools • When poles reverse, these small grains switch • Earth’s magnetic field results from movement in the outer core ...
... poles of Earth & harden in the rock as it cools • When poles reverse, these small grains switch • Earth’s magnetic field results from movement in the outer core ...
TB Chapter 13 - Discover Earth Science
... • Divergent Boundaries- plates are moving apart at spreading centers • These boundaries form mid-ocean ridges or rises (like underwater mountain ranges) • In between the 2 peaks of the ridge are valleys called rift valleys – Ex. mid-Atlantic Ridge, g , East Pacific Ridge g ...
... • Divergent Boundaries- plates are moving apart at spreading centers • These boundaries form mid-ocean ridges or rises (like underwater mountain ranges) • In between the 2 peaks of the ridge are valleys called rift valleys – Ex. mid-Atlantic Ridge, g , East Pacific Ridge g ...
Sea Floor Spreading The Mid-ocean Ridge
... • Seafloor spreading- new ocean crust is formed at ocean ridges and destroyed at deep sea trenches – Magma forced toward crust – Fills gaps and hardens – Forms new ocean floor ...
... • Seafloor spreading- new ocean crust is formed at ocean ridges and destroyed at deep sea trenches – Magma forced toward crust – Fills gaps and hardens – Forms new ocean floor ...
answers
... 38. The process which occurs during the convergence of two oceanic plates, or an oceaniccontinental plate resulting in old oceanic plate (old sea floor) being recycled back down into the mantle is called: a. sea floor spreading b. convection c. subduction d. elimination 39. The result of two oceanic ...
... 38. The process which occurs during the convergence of two oceanic plates, or an oceaniccontinental plate resulting in old oceanic plate (old sea floor) being recycled back down into the mantle is called: a. sea floor spreading b. convection c. subduction d. elimination 39. The result of two oceanic ...
Plate Tectonics - ESL Consulting Services
... subducted plate, and rises toward the surface because it is less dense than the surrounding rock. The “Ring of Fire” around the Pacific Ocean is caused by this melting at subduction zones all around the Pacific. ...
... subducted plate, and rises toward the surface because it is less dense than the surrounding rock. The “Ring of Fire” around the Pacific Ocean is caused by this melting at subduction zones all around the Pacific. ...
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.