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Chapter 14 text
Chapter 14 text

...  Slide slowly across earth’s surface - Ocean basins form where continents crack and pull apart. - Magma (molten rock) forced up through the cracks forms new oceanic crust that piles up underwater in mid-ocean ridges. ...
Example Assessment - personal . plattsburgh . edu
Example Assessment - personal . plattsburgh . edu

... Review: Chapter 5: Slip, Slide, & Collide 29. What kind of plate boundary is found where the North American and Caribbean Plates meet? a. Caribbean boundary b. Convergent boundary c. Divergent boundary d. Transform boundary The correct answer is d) Transform boundary Review: Chapter 4: Plates & Boun ...
Picture Review Name
Picture Review Name

... Upward Magma, lava Rocks Rises, sinks Sinks, rises Supercontinent Two broken continents of Pangea Convection current in the asthenosphere Continents are drifting apart by Alfred Wegener What explains the continental drift theory. Plates move because of the convection current in the mantle. Plates se ...
Manusript of the article: Varga, P., Krumm, FW, Grafarend, EW
Manusript of the article: Varga, P., Krumm, FW, Grafarend, EW

No Slide Title
No Slide Title

... Area where one plate is subducting under another plate is called an oceanic__________. ...
Oceanography Review Key
Oceanography Review Key

... 6. List the features found at active continental margins. Continental shelf, continental slope, trench 7. List the features found at passive continental margins. Continental shelf, continental slope, continental rise. ...
Plate Tectonics: The Mechanism
Plate Tectonics: The Mechanism

Mountain Formation
Mountain Formation

... mountains are formed at convergent boundaries, but some are formed at divergent boundaries  The mountains that form along ocean ridges at divergent plate boundaries are fault-block type mountains  Example: the 65,000 kilometer long mid-ocean ridge system ...
Study Guide Exam #4
Study Guide Exam #4

... Chapters 12 & 13 Plate Tectonics: How do continental crust and oceanic crust differ in density, composition, thickness, and relative age? What is isostacy and how does it explain why the oceanic crust sits at a lower elevation than continental crust? ...
Plate tectonics, 9-2..
Plate tectonics, 9-2..

... Evidence accumulated in favor of theory • Orientation of rock crystals on land masses showed different orientations, based on Earth’s magnetic fields when rocks cooled ...
Tectonic Hazards - Bedford Free School
Tectonic Hazards - Bedford Free School

... Collision plate boundary form when two continental plates collide. Neither plate is forced under the other, and so both are forced up and form fold mountains. A constructive plate boundary occurs when plates move apart. Volcanoes are formed as magma wells up to fill the gap, and eventually new crust ...
Scott Foresman Science
Scott Foresman Science

... Name ...
Earth`s Internal Heat
Earth`s Internal Heat

... Divergent plate boundaries exist where two tectonic plates move away from each other. Where two oceanic plates pull apart, magma rises and erupts as lava at the surface. The lava quickly cools and hardens to form new crust. However, the newly formed crust is still much hotter than older crust farthe ...
Inside Our Earth
Inside Our Earth

... ● Forces that construct/build up mountains are called constructive forces. They shape the land’s surface by building up mountains and other landmasses. ● Destructive forces destroy and wear away landmasses forces such as ice, rain, wind, and changing temperatures ...
Notes for the Test Word Definition Pangaea Pangaea is the name
Notes for the Test Word Definition Pangaea Pangaea is the name

... The Earth’s crust and upper mantle are broken into sections called plates. Plates move around on top of the mantle like rafts ...
printer-friendly version of benchmark
printer-friendly version of benchmark

... to volcanism and mountain building. It provides explanations as to why earthquakes and volcanic eruptions occur in very specific areas around the world, and how and why great mountain ranges like the Alps and Himalayas formed. The theory of plate tectonics states that the Earth’s rigid outermost lay ...
Volcano Research Paper
Volcano Research Paper

... Convergent Boundary • A boundary when plates collide and it gets denser and bends • One plate moves under the other (this is called subduction) • As a plate moves down it gets greater heat & pressure • Plates release fluid which causes surrounding rock to melt • When subduction occurs, the denser pl ...
Teaching for Deep and Enduring Understanding of the Development
Teaching for Deep and Enduring Understanding of the Development

... • What does the ocean floor between North America and Europe look like? • Describe what is under the continents. • Describe what happens to the ocean floor when the continents move during continental drift. • What allows the continents to move? • Where does the energy needed to move the continents c ...
Tapping Preconception
Tapping Preconception

... • What does the ocean floor between North America and Europe look like? • Describe what is under the continents. • Describe what happens to the ocean floor when the continents move during continental drift. • What allows the continents to move? • Where does the energy needed to move the continents c ...
Word format
Word format

... C. lithosphere, asthenosphere, lower mantle, outer core, inner core D. inner core, mantle, lithosphere, asthenosphere E. inner core, outer core, lower mantle, upper mantle, lithosphere ...
Chapter 2
Chapter 2

... tectonics explains how forces within the planet create landforms. • The tectonics theory views Earth’s crust as divided into more than a dozen rigid, slow moving plates. The plates can be compared to the cracked shell of a hard boiled egg. ...
Chapter 1, Section 1 – Earth`s Interior
Chapter 1, Section 1 – Earth`s Interior

... a. Two main methods of exploring Earth’s interior: i. Direct evidence – rock samples ii. Indirect evidence – seismic waves 1. examine the speed and paths of seismic waves b. Seismic waves i. Produced from earthquakes ii. Measured with seismographs iii. Two most common types: 1. P waves (primary wave ...
The Geosphere
The Geosphere

... Why can Earth’s tectonic plates move? Most tectonic activity occurs along Earth’s _____________________. Mountain ranges are formed when tectonic plates _________________. Is it possible to never notice an earthquake? Describe one way than an earthquake can cause damage. ...
Picture Review Name
Picture Review Name

... Upward Magma, lava Rocks Rises, sinks Sinks, rises Supercontinent Two broken continents of Pangea Convection current in the asthenosphere Continents are drifting apart by Alfred Wegener What explains the continental drift theory. Plates move because of the convection current in the mantle. Plates se ...
Plate Tec Online
Plate Tec Online

... below. Use the arrows on the bottom of the web page to navigate through this section. 8. What is the Mid-Atlantic Ridge? __________________________________________________________________________________________ ________________________________________________________________________________________ ...
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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.
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