Read-Only - Elliott County Schools
... Interpreting Graphics, continued 13. Describe how a transform boundary differs from the boundaries shown by letters D and E in terms of plate movement and magmatic activity. Answers should include: unlike the plates at a convergent boundary, shown by letter E, or divergent boundary, shown by letter ...
... Interpreting Graphics, continued 13. Describe how a transform boundary differs from the boundaries shown by letters D and E in terms of plate movement and magmatic activity. Answers should include: unlike the plates at a convergent boundary, shown by letter E, or divergent boundary, shown by letter ...
Volcanism: Geological And Geographic Perspectives
... Currently, the hypotheses of sea-floor spreading and "plate tectonics" are gaining wide acceptance, although they certainly cannot as yet be considered proven, and important objections to them have been raised. Briefly, the concept is as follows. Large rigid plates of lithosphere (the crust and uppe ...
... Currently, the hypotheses of sea-floor spreading and "plate tectonics" are gaining wide acceptance, although they certainly cannot as yet be considered proven, and important objections to them have been raised. Briefly, the concept is as follows. Large rigid plates of lithosphere (the crust and uppe ...
Plate Tectonics - ESL Consulting Services
... lithosphere 250 million years ago. Through continental drift the Earth’s lithosphere is constantly moving on top of the asthenosphere. The rate and direction of plate motion is not necessarily constant. There are different types of plate motion. Density and temperature of magma cause the movement of ...
... lithosphere 250 million years ago. Through continental drift the Earth’s lithosphere is constantly moving on top of the asthenosphere. The rate and direction of plate motion is not necessarily constant. There are different types of plate motion. Density and temperature of magma cause the movement of ...
9.3 Theory of Plate Tectonics
... Along divergent boundaries, plates move apart. Because they are the areas where sea-floor spreading begins, divergent boundaries are also called spreading centers. Most divergent boundaries are spreading centers located along the crests of mid-ocean ridges. Some spreading centers, however, occur on t ...
... Along divergent boundaries, plates move apart. Because they are the areas where sea-floor spreading begins, divergent boundaries are also called spreading centers. Most divergent boundaries are spreading centers located along the crests of mid-ocean ridges. Some spreading centers, however, occur on t ...
Rocking our world - University of Victoria
... delivered to North America by plate movement long after they died. “What we’re just starting to look at is whether there might also have been an influx of new, living dinosaurs into North America while the continents were colliding—an invasion of dinosaurs that had cruised north on SAYBIA.” Johnston ...
... delivered to North America by plate movement long after they died. “What we’re just starting to look at is whether there might also have been an influx of new, living dinosaurs into North America while the continents were colliding—an invasion of dinosaurs that had cruised north on SAYBIA.” Johnston ...
Earthquakes
... Faults usually occur along plate boundaries, where the forces of plate motion compress, pull, or shear the crust too much so the crust smashes ...
... Faults usually occur along plate boundaries, where the forces of plate motion compress, pull, or shear the crust too much so the crust smashes ...
Document
... What are the layers of the Earth based on chemistry (in the correct order, from the center to the surface)? A. Crust, Mantle, Core B. Core, Mantle, Crust C. Mantle, Core, Crust D. Inner Core, Outer Core, Mantle, Crust ...
... What are the layers of the Earth based on chemistry (in the correct order, from the center to the surface)? A. Crust, Mantle, Core B. Core, Mantle, Crust C. Mantle, Core, Crust D. Inner Core, Outer Core, Mantle, Crust ...
Mountain Building, Earthquakes, and Sea Floor
... normal faults The uplifted blocks are horsts The down dropped blocks are grabens ...
... normal faults The uplifted blocks are horsts The down dropped blocks are grabens ...
Continental Drift Theory Essay Final
... Alfred believed that over a hundreds of millions years ago the continents formed a super continent called Pangea, meaning all earth. Even though Alfred Wegener's 1915 drawing was not believed until around 1940, it has changed our outlook on life for many people and the world. About 200 million years ...
... Alfred believed that over a hundreds of millions years ago the continents formed a super continent called Pangea, meaning all earth. Even though Alfred Wegener's 1915 drawing was not believed until around 1940, it has changed our outlook on life for many people and the world. About 200 million years ...
(1 point
... provided. Title this drawing “Earth’s Mantle”.(5 points) D. Earth’s Core (10 points, 5 points for 1-4) 1. What is the Earth’s Core thought to be mainly composed of? 2. What releases the heat in the core that provides the source of the cores internal heat? 3. The outer core is _______________________ ...
... provided. Title this drawing “Earth’s Mantle”.(5 points) D. Earth’s Core (10 points, 5 points for 1-4) 1. What is the Earth’s Core thought to be mainly composed of? 2. What releases the heat in the core that provides the source of the cores internal heat? 3. The outer core is _______________________ ...
PowerPoint
... where slabs of crust slip past each other. The rocks on both sides of a fault can move up or down or sideways When enough stress builds on a rock, the rock shatters, creating faults Faults usually occur along plate boundaries, where the forces of plate motion compress, pull, or shear the crust too m ...
... where slabs of crust slip past each other. The rocks on both sides of a fault can move up or down or sideways When enough stress builds on a rock, the rock shatters, creating faults Faults usually occur along plate boundaries, where the forces of plate motion compress, pull, or shear the crust too m ...
SCIENCE 6 3rd rating part 1
... 1. Let the pupils read orally textbook page 199-200 about eh moving crust of the earth. 2. Divide the class into two groups Group I Perform Activity 6.2 (Into the Future p. 109) Group II Perform Activity – Simulating a Crustal Movement – The Science Connection 6 p. 211 a. What happens to the towels ...
... 1. Let the pupils read orally textbook page 199-200 about eh moving crust of the earth. 2. Divide the class into two groups Group I Perform Activity 6.2 (Into the Future p. 109) Group II Perform Activity – Simulating a Crustal Movement – The Science Connection 6 p. 211 a. What happens to the towels ...
Quiz 2 Fall 2007 Handout Page
... 23. The idea proposed by Alfred Wegener to explain the continental shapes and positions is known as _____. a. sea floor spreading b. Pangaea c. continental drift d. plate tectonics e. rift valley ...
... 23. The idea proposed by Alfred Wegener to explain the continental shapes and positions is known as _____. a. sea floor spreading b. Pangaea c. continental drift d. plate tectonics e. rift valley ...
Graham Cracker Frosting Lab
... The Theory of Plate Tectonics states that the crust of the Earth is composed of seven major plates and numerous smaller plates. These plates “ride” on the hot plastic upper mantle known as the asthenosphere. This theory also says that most of these plates are in motion, due to convection in the mant ...
... The Theory of Plate Tectonics states that the crust of the Earth is composed of seven major plates and numerous smaller plates. These plates “ride” on the hot plastic upper mantle known as the asthenosphere. This theory also says that most of these plates are in motion, due to convection in the mant ...
How vocanoes form File
... Magma can also push up under the middle of a lithosphere plate, though this is much less common than magma production around plate boundaries. This interplate volcanic activity is caused by unusually hot mantle material forming in the lower mantle and pushing up into the upper mantle. The mantle mat ...
... Magma can also push up under the middle of a lithosphere plate, though this is much less common than magma production around plate boundaries. This interplate volcanic activity is caused by unusually hot mantle material forming in the lower mantle and pushing up into the upper mantle. The mantle mat ...
Thermal structure
... • For the most part, Earth’s mechanical structure is equivalent to it’s viscosity structure • Viscosity structure is temperature dependent and non-linear, with viscosity decreasing near the melting temperature. • Viscosity is also strongly dependent on water content • Large mechanical contrasts exis ...
... • For the most part, Earth’s mechanical structure is equivalent to it’s viscosity structure • Viscosity structure is temperature dependent and non-linear, with viscosity decreasing near the melting temperature. • Viscosity is also strongly dependent on water content • Large mechanical contrasts exis ...
Explore and Discover… Volcanoes and Earthquakes
... How would you try and reduce the impact of earthquakes on people? Write two ideas here: Ideas from the displays could include: • Tsunami early warning systems, when the first seismic waves are detected. • Automatic shutdowns of public transport and power stations in areas at risk of tsunamis, when ...
... How would you try and reduce the impact of earthquakes on people? Write two ideas here: Ideas from the displays could include: • Tsunami early warning systems, when the first seismic waves are detected. • Automatic shutdowns of public transport and power stations in areas at risk of tsunamis, when ...
Plate Tectonics - 7thGradeScienceBCS
... The box represents a conveyor belt. The drawings represent packages. Which person are the packages moving toward? ...
... The box represents a conveyor belt. The drawings represent packages. Which person are the packages moving toward? ...
Y10 Earthquakes - Learning on the Loop
... Crust - 6km thick under oceans – solid - up to 70 km thick under continents. Av: 30-40 km Mantle- 3 000 km thick – plastic – flows - upper 100 km – rigid Outer core – 2,300 km thick – liquid Inner core – 1,200 km thick - solid ...
... Crust - 6km thick under oceans – solid - up to 70 km thick under continents. Av: 30-40 km Mantle- 3 000 km thick – plastic – flows - upper 100 km – rigid Outer core – 2,300 km thick – liquid Inner core – 1,200 km thick - solid ...
Plate motions, mantle convection and chaos
... University of Toronto, Toronto, Canada McMaster University, Hamilton, Canada ...
... University of Toronto, Toronto, Canada McMaster University, Hamilton, Canada ...
Chapter 13 - The Theory of Plate Tectonics
... The Creation and Destruction of Seafloor In 1960, geologists Harry Hess and Robert S. Dietz proposed an explanation of seafloor features. They hypothesized that the seafloor is in a constant state of creation and destruction through a process called seafloor spreading. In the theory of seafloor ...
... The Creation and Destruction of Seafloor In 1960, geologists Harry Hess and Robert S. Dietz proposed an explanation of seafloor features. They hypothesized that the seafloor is in a constant state of creation and destruction through a process called seafloor spreading. In the theory of 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.