Earths Changing Surface
... 1. _________ boundary is when 2 plates move away from each other. 2. _________ is when 2 oceanic plates move apart. 3. ________ occurs along the boundary of sea floor spreading. 4. Breaks or cracks in earth’s surface are called _____ 5. Earthquakes occur as a result of _______ boundaries. ...
... 1. _________ boundary is when 2 plates move away from each other. 2. _________ is when 2 oceanic plates move apart. 3. ________ occurs along the boundary of sea floor spreading. 4. Breaks or cracks in earth’s surface are called _____ 5. Earthquakes occur as a result of _______ boundaries. ...
the proof-----seafloor spreading
... •An American scientist named Harry Hess proposed the seafloor spreading theory in ...
... •An American scientist named Harry Hess proposed the seafloor spreading theory in ...
Layers of the Earth
... mass. Common elements found in the mantle are: silicon, oxygen, aluminum, iron, & magnesium. ...
... mass. Common elements found in the mantle are: silicon, oxygen, aluminum, iron, & magnesium. ...
Plate Boundaries and Earthquake Science
... III. Plate Tectonics • three types of plate boundaries: o divergent plates spreading apart small earthquakes example: ocean floors o convergent plates come together subduction zones increased volcanic activity large earthquakes example: South America o transform plates slide past o ...
... III. Plate Tectonics • three types of plate boundaries: o divergent plates spreading apart small earthquakes example: ocean floors o convergent plates come together subduction zones increased volcanic activity large earthquakes example: South America o transform plates slide past o ...
Plate Tectonics
... isostatic equilibrium: the concept that the oceanic crust and the continental crust float buoyantly in the denser mantle beneath. • Earth’s internal layers are studied by observing how earthquake waves change as they pass through the earth. • In plate tectonic theory the Earth’s outer rigid surface ...
... isostatic equilibrium: the concept that the oceanic crust and the continental crust float buoyantly in the denser mantle beneath. • Earth’s internal layers are studied by observing how earthquake waves change as they pass through the earth. • In plate tectonic theory the Earth’s outer rigid surface ...
Lecture3_ptectonics2
... Large earthquakes Volcanoes over the subducting slab on the overriding plate ...
... Large earthquakes Volcanoes over the subducting slab on the overriding plate ...
Plate Tectonics : Different Plate Boundaries Create Different
... break/fault. As crust is stretched wider, the valley drops deeper. Eventually can lead to the creation of a new body of water if low enough. ...
... break/fault. As crust is stretched wider, the valley drops deeper. Eventually can lead to the creation of a new body of water if low enough. ...
Plate Tectonics : Different Plate Boundaries Create Different
... break/fault. As crust is stretched wider, the valley drops deeper. Eventually can lead to the creation of a new body of water if low enough. ...
... break/fault. As crust is stretched wider, the valley drops deeper. Eventually can lead to the creation of a new body of water if low enough. ...
MST DQ Week 3 Name: 3/31/2014 1. During which season does
... plate, forming composite volcanoes on the continent C. Island arc because one oceanic plate melts underneath the continental plate, forming volcanic mountains that eventually become islands D. Folded mountain range because the two colliding plates have equal composition and density, causing both to ...
... plate, forming composite volcanoes on the continent C. Island arc because one oceanic plate melts underneath the continental plate, forming volcanic mountains that eventually become islands D. Folded mountain range because the two colliding plates have equal composition and density, causing both to ...
Notes
... against each other and raise the crust (i.e. Himalayas) or move one under the other (Andes) to produce mountains and often volcanoes. • When plates slide along each other friction resists motion until too much stored force is present and the slide abruptly (southern California) again producing earth ...
... against each other and raise the crust (i.e. Himalayas) or move one under the other (Andes) to produce mountains and often volcanoes. • When plates slide along each other friction resists motion until too much stored force is present and the slide abruptly (southern California) again producing earth ...
Plate Movement - San Jose Unified School District
... Magma injected along the central rift spills over and forms a chain of underwater mountains and volcanoes. This is now a fully functional mid-ocean spreading ridge, with new ocean crust being injected into the central rift. The ocean will continue to grow wider until the continental crust at the edg ...
... Magma injected along the central rift spills over and forms a chain of underwater mountains and volcanoes. This is now a fully functional mid-ocean spreading ridge, with new ocean crust being injected into the central rift. The ocean will continue to grow wider until the continental crust at the edg ...
File - Flipped Out Science with Mrs. Thomas!
... Satellite images have provided evidence for plate tectonics by showing the geologic features that form at the boundaries between tectonic plates. East Africa’s Great Rift Valley (left) is so large it can be seen from space. The San Andreas Fault (right) is slowly pulling southern California and part ...
... Satellite images have provided evidence for plate tectonics by showing the geologic features that form at the boundaries between tectonic plates. East Africa’s Great Rift Valley (left) is so large it can be seen from space. The San Andreas Fault (right) is slowly pulling southern California and part ...
Ocean Floor
... Earth structure, Plate tectonics and Ocean floor Difference between oceanic and continental crust. Understand the processes that are continuously changing Earth’s surface as lithospheric plates move relative to one another. Identify the role of oceanic ridges, transform faults and deep-sea trenches ...
... Earth structure, Plate tectonics and Ocean floor Difference between oceanic and continental crust. Understand the processes that are continuously changing Earth’s surface as lithospheric plates move relative to one another. Identify the role of oceanic ridges, transform faults and deep-sea trenches ...
continental drift - East Hanover Schools
... • As the seafloor spreads apart at a midocean ridge, new seafloor is created. • The older seafloor moves away from the ridge in opposite directions. • This helped explain how the crust could move—something that the continental drift hypothesis could not do. ...
... • As the seafloor spreads apart at a midocean ridge, new seafloor is created. • The older seafloor moves away from the ridge in opposite directions. • This helped explain how the crust could move—something that the continental drift hypothesis could not do. ...
Plate Tectonics
... Plate Tectonics Liz LaRosa for use with my 5th Grade Science Class http://www.middleschoolscience.com 2009 ...
... Plate Tectonics Liz LaRosa for use with my 5th Grade Science Class http://www.middleschoolscience.com 2009 ...
(granite) and the deep
... Continental Margin: the submerged outer edge of a continent marks the transition between continent and ocean, composed of shelf, slope & rise a. continental shelf - underwater extension of the continent, most biologically productive area because of light availability b. continental slope – sloping ...
... Continental Margin: the submerged outer edge of a continent marks the transition between continent and ocean, composed of shelf, slope & rise a. continental shelf - underwater extension of the continent, most biologically productive area because of light availability b. continental slope – sloping ...
The Origins of Plate Tectonics Theory
... on both sides. Similar features, called “mid-ocean ridges” by their discoverers, were mapped in the eastern Pacific Ocean and the western Indian Ocean. Based on the fact that they were parallel to the edges of the continents, the ridges had something to do with continental drift, but what? In a 1962 ...
... on both sides. Similar features, called “mid-ocean ridges” by their discoverers, were mapped in the eastern Pacific Ocean and the western Indian Ocean. Based on the fact that they were parallel to the edges of the continents, the ridges had something to do with continental drift, but what? In a 1962 ...
Plate Tectonics
... • Earthquakes are a sudden shaking of the ground caused by the movement of plates. • Earthquakes occur along faults. – Faults are cracks in the crust where plates move past each other. ...
... • Earthquakes are a sudden shaking of the ground caused by the movement of plates. • Earthquakes occur along faults. – Faults are cracks in the crust where plates move past each other. ...
3.1 Reading Guide
... 7. Describe the contents of the crust. 8. Describe the contents of the mantle. 9. Describe the contents of the core. 10. When did the supercontinent, Pangaea, exist? 11. How are the Earth’s layers divided? 12. What is the lithosphere? ...
... 7. Describe the contents of the crust. 8. Describe the contents of the mantle. 9. Describe the contents of the core. 10. When did the supercontinent, Pangaea, exist? 11. How are the Earth’s layers divided? 12. What is the lithosphere? ...
Different plate boundaries
... be destroyed through subduction, so there are no volcanoes, and instead the plates are pushed upwards. ...
... be destroyed through subduction, so there are no volcanoes, and instead the plates are pushed upwards. ...
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.