Continental Drift and Plate Tectonic
... continent movement • Solution came from seafloor mapping data • States: Earth’s crust is divided into distinct plates that float on molten interior -> continents move as plates move ...
... continent movement • Solution came from seafloor mapping data • States: Earth’s crust is divided into distinct plates that float on molten interior -> continents move as plates move ...
CHANGING EARTH NOTES
... - Theory of ____________________ : moving tectonic plates, not just continents, is the present theory. - The ____________________ is broken into these plates. - There are about __________ plates and they move about ________________ a year. B: The Force: -The force that moves the plates (that Wegener ...
... - Theory of ____________________ : moving tectonic plates, not just continents, is the present theory. - The ____________________ is broken into these plates. - There are about __________ plates and they move about ________________ a year. B: The Force: -The force that moves the plates (that Wegener ...
Earth Science Chapter 17: Plate Tectonics Chapter Overview
... The transfer of heated material is called convection. The heating of matter causes it to expand and to decrease in density. The warm matter then rises because of buoyancy. As the matter rises it cools, contracts, becomes more dense, and then sinks because of gravity. This pattern of up and down moti ...
... The transfer of heated material is called convection. The heating of matter causes it to expand and to decrease in density. The warm matter then rises because of buoyancy. As the matter rises it cools, contracts, becomes more dense, and then sinks because of gravity. This pattern of up and down moti ...
Document
... • An ocean plate and a continental plate hit head-on. The ocean plate subducts under the continent forming a trench. The subducting plate melts. Magma rises to the surface creating a string of volcanic mountains parallel to the shoreline. ...
... • An ocean plate and a continental plate hit head-on. The ocean plate subducts under the continent forming a trench. The subducting plate melts. Magma rises to the surface creating a string of volcanic mountains parallel to the shoreline. ...
Take Home 11 Complete the following on your own paper. Do not
... distance to an object. L. Name of the single landmass that broke apart 200 million years ago and drifted apart into continents. M. Plate boundary where two plates move away from each other. N. Undersea mountain chain; divergent plate boundary. O. Plate boundary where two plates move toward each othe ...
... distance to an object. L. Name of the single landmass that broke apart 200 million years ago and drifted apart into continents. M. Plate boundary where two plates move away from each other. N. Undersea mountain chain; divergent plate boundary. O. Plate boundary where two plates move toward each othe ...
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... • Continental slope: steep, boundary between continental and oceanic crust. Submarine canyons. To 3,000 - 4,000 M depth. • Continental rise: sediment accumulation. Turbidity currents. Mud and sand. • Abyssal plain: 4,500 - 6,000 M depth. Oceanic crust below. Mostly flat and soft sediment. Mangane ...
... • Continental slope: steep, boundary between continental and oceanic crust. Submarine canyons. To 3,000 - 4,000 M depth. • Continental rise: sediment accumulation. Turbidity currents. Mud and sand. • Abyssal plain: 4,500 - 6,000 M depth. Oceanic crust below. Mostly flat and soft sediment. Mangane ...
TOPICS: Earthquakes Plate Movement and Boundaries Landforms
... age of oceanic crust, magnetic signatures) that explain seafloor spreading. KEY VOCAB: seafloor spreading, magnetic signatures, magnetic field reversal, midocean ridge, temperature of oceanic crust, age of oceanic crust ...
... age of oceanic crust, magnetic signatures) that explain seafloor spreading. KEY VOCAB: seafloor spreading, magnetic signatures, magnetic field reversal, midocean ridge, temperature of oceanic crust, age of oceanic crust ...
Plate Tectonics and the Ocean Floor opens with a brief history of
... 3. Oceanic-continental convergence a. Ocean plate subducted beneath continental plate b. Continental arc made up of andesite volcanic rock created through explosive volcanic activity 4. Oceanic-oceanic convergence a. Denser oceanic plate subducted beneath other oceanic plate b. Island arc made up of ...
... 3. Oceanic-continental convergence a. Ocean plate subducted beneath continental plate b. Continental arc made up of andesite volcanic rock created through explosive volcanic activity 4. Oceanic-oceanic convergence a. Denser oceanic plate subducted beneath other oceanic plate b. Island arc made up of ...
PowerPoint - Cal State LA - Instructional Web Server
... Plates interact with each other along their edges (plate boundaries) Plate boundaries have a high degree of tectonic activity – mountain building – earthquakes – volcanoes ...
... Plates interact with each other along their edges (plate boundaries) Plate boundaries have a high degree of tectonic activity – mountain building – earthquakes – volcanoes ...
The Rock Cycle - WNMS8thScience
... Solid – cannot move through liquid Side-to-side motion Slower Shadow zone – told us that the Earth’s interior is liquid ...
... Solid – cannot move through liquid Side-to-side motion Slower Shadow zone – told us that the Earth’s interior is liquid ...
Section 11-3
... • No subduction zone usually occurs here. • The collision forms mountain ranges or causes earthquakes. ...
... • No subduction zone usually occurs here. • The collision forms mountain ranges or causes earthquakes. ...
Week 1
... Related to avalanche of subducted slabs that break the 660 When major mass arrives to D`` it causes superplume events. ...
... Related to avalanche of subducted slabs that break the 660 When major mass arrives to D`` it causes superplume events. ...
Sea-Floor Spreading
... A trench is a steep-walled valley on the sea floor adjacent to a continental margin. For example, ocean crust formed at the East Pacific Rise, an oceanic ridge in the east Pacific, plunges into the trench adjacent to the Andes Mountains on the west side of the South American continent. In Hess' mode ...
... A trench is a steep-walled valley on the sea floor adjacent to a continental margin. For example, ocean crust formed at the East Pacific Rise, an oceanic ridge in the east Pacific, plunges into the trench adjacent to the Andes Mountains on the west side of the South American continent. In Hess' mode ...
Earth structure
... All students are able to recall the structure of the Earth ( grade D ) Most students are to describe what are tectonic plates and how they move by convection currents ( grade C ) Some students are able to explain continental drift and what happens at plate boundaries ( grade B ) ...
... All students are able to recall the structure of the Earth ( grade D ) Most students are to describe what are tectonic plates and how they move by convection currents ( grade C ) Some students are able to explain continental drift and what happens at plate boundaries ( grade B ) ...
Evidence of Continental Drift
... confirmed what the seafloor spreading hypothesis predicted. • The youngest oceanic crust is at the ridge crest, and the oldest oceanic crust is at the continental margins. ...
... confirmed what the seafloor spreading hypothesis predicted. • The youngest oceanic crust is at the ridge crest, and the oldest oceanic crust is at the continental margins. ...
Continental Drift
... several year’s movement is released all at once in an earthquake. There are three main types of plate boundary. • Divergent plate boundaries • Convergent plate boundaries • Transform fault boundaries ...
... several year’s movement is released all at once in an earthquake. There are three main types of plate boundary. • Divergent plate boundaries • Convergent plate boundaries • Transform fault boundaries ...
plate tectonics
... Graded Work Take notes in outline form in your notebook (use subtopics and bold words) ...
... Graded Work Take notes in outline form in your notebook (use subtopics and bold words) ...
The Modern Theory of Plate Tectonics
... For some reason(s), these plates are moving. There are two types of crust “riding” on the plates – continental crust and oceanic crust. New crust can form (at spreading plate boundaries) and older crust can be destroyed at subduction zones, where plates are coming together. ...
... For some reason(s), these plates are moving. There are two types of crust “riding” on the plates – continental crust and oceanic crust. New crust can form (at spreading plate boundaries) and older crust can be destroyed at subduction zones, where plates are coming together. ...
Chapter 9 Plate Tectonics
... Effects Plate motion averages about 5cm per year About as fast as your fingernails grow Earthquakes, volcanoes, and mountain building ...
... Effects Plate motion averages about 5cm per year About as fast as your fingernails grow Earthquakes, volcanoes, and mountain building ...
Plate Tectonics slideshow
... and becoming more rounded. Why are these two mountains changing in different ways? Himalayas’ convergent boundary is still active, while Appalachians’ boundary is no longer active (so they are being weathered and eroded) ...
... and becoming more rounded. Why are these two mountains changing in different ways? Himalayas’ convergent boundary is still active, while Appalachians’ boundary is no longer active (so they are being weathered and eroded) ...
Get the GIST on the Theories of Continental Drift and Seafloor
... 12. The place where lithospheric plates meet are called plate boundaries. There are 3 types of plate boundaries shown on pages 108-109. Write the types of boundaries, then study the illustrations at the bottom of the pages. a) ____________________ boundaries- plates move away from each other. b) ___ ...
... 12. The place where lithospheric plates meet are called plate boundaries. There are 3 types of plate boundaries shown on pages 108-109. Write the types of boundaries, then study the illustrations at the bottom of the pages. a) ____________________ boundaries- plates move away from each other. b) ___ ...
Early Earth Quiz Prep
... 3. True or false (circle) – Continents keep changing, but never disappear? Vocabulary; Know the meaning of each word. Word Bank: molten landforms Pangaea plateau plate tectonics ______________ ...
... 3. True or false (circle) – Continents keep changing, but never disappear? Vocabulary; Know the meaning of each word. Word Bank: molten landforms Pangaea plateau plate tectonics ______________ ...
plates
... As the seafloor spreads apart, magma moves up and flows from the cracks, cools, and forms new seafloor ...
... As the seafloor spreads apart, magma moves up and flows from the cracks, cools, and forms new seafloor ...
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.