What is the Earth made of?
... moving apart due to convection currents inside the earth. The Eurasian and North American plates moving away from each other – so very slowly Europe is getting further away from America. As the plates move apart (very slowly), magma rises from the mantle. The magma erupts to the surface of the earth ...
... moving apart due to convection currents inside the earth. The Eurasian and North American plates moving away from each other – so very slowly Europe is getting further away from America. As the plates move apart (very slowly), magma rises from the mantle. The magma erupts to the surface of the earth ...
1. What evidence did Alfred Wagner use to support his theory of
... They were Arthur Holmes and Harry Hess. Their evidence was that thermal convection in the earth’s mantle could cause continents to move, but they suggested that the continents didn’t move but were “carried” by larger pieces of the earth’s crust called tectonic plates. And it let to the development o ...
... They were Arthur Holmes and Harry Hess. Their evidence was that thermal convection in the earth’s mantle could cause continents to move, but they suggested that the continents didn’t move but were “carried” by larger pieces of the earth’s crust called tectonic plates. And it let to the development o ...
Composite Volcanoes - Wallkill Valley Regional High School
... Basalt is much denser than the granite. Because of this the less dense continents ride on the denser oceanic plates. ...
... Basalt is much denser than the granite. Because of this the less dense continents ride on the denser oceanic plates. ...
Quizlet Chapter 30: Plate Tectonics- Plate tectonics Introduction to
... 1. The lithosphere is broken into about a dozen large plates (and some smaller ones) that “float” on asthenosphere 2. Convection currents in the asthenosphere move the plates (1 to 15 cm per year) 3. Gravitational and electromagnetic forces push the plates. 4. Energy comes from radioactive decay of ...
... 1. The lithosphere is broken into about a dozen large plates (and some smaller ones) that “float” on asthenosphere 2. Convection currents in the asthenosphere move the plates (1 to 15 cm per year) 3. Gravitational and electromagnetic forces push the plates. 4. Energy comes from radioactive decay of ...
EarthViewer Questions
... 17. On what continents have scientists found fossils of the seed fern Glossopteris? ____________________________________________ ____________________________________________ _______________________________________ _______________ ...
... 17. On what continents have scientists found fossils of the seed fern Glossopteris? ____________________________________________ ____________________________________________ _______________________________________ _______________ ...
Earth Surfaces Chapter 1 Study Guide The inner core is . (A
... 15. Mantle material rises in convection currents because heated materials N. conduction become ____________ dense. (U-Y) 16. When geologists study Earth’s interior, they rely on ________ methods O. indirect such as seismic waves to study layers. (K-O) 17. When sun warms your face it is a form of hea ...
... 15. Mantle material rises in convection currents because heated materials N. conduction become ____________ dense. (U-Y) 16. When geologists study Earth’s interior, they rely on ________ methods O. indirect such as seismic waves to study layers. (K-O) 17. When sun warms your face it is a form of hea ...
Plate Tectonics II: Transform Faults, Subduction Zones, and Ho
... b. Of the plate boundaries you identified above, which has the deepest earthquakes? c. Along western South America, what is the position of the earthquakes with respect to the trenches? d. What major types of geologic features are common in subduction zones? e. What geologic events are common at sub ...
... b. Of the plate boundaries you identified above, which has the deepest earthquakes? c. Along western South America, what is the position of the earthquakes with respect to the trenches? d. What major types of geologic features are common in subduction zones? e. What geologic events are common at sub ...
Testing Plate tectonics
... The Hawaiian Islands were formed when the Pacific Plate moved over A. B. C. D. ...
... The Hawaiian Islands were formed when the Pacific Plate moved over A. B. C. D. ...
Getting to Know: Plate Tectonics
... What natural processes do tectonic plates cause? Tectonic plates are the cause of many natural processes on Earth’s surface. For example, heat flow and movement of material within Earth causes earthquakes and volcanic eruptions. Mountains and ocean basins also result from tectonic movement. At the e ...
... What natural processes do tectonic plates cause? Tectonic plates are the cause of many natural processes on Earth’s surface. For example, heat flow and movement of material within Earth causes earthquakes and volcanic eruptions. Mountains and ocean basins also result from tectonic movement. At the e ...
Geobit 10.indd
... continental plate “picks up” small pieces of crust and piles them into a mismatched collection on the west edge. As the Rockies rise, they cut off moisture to the plains to the east. As the global climate temporarily cools, glaciers cover the Midwest many times and completely reshape Illinois into a ...
... continental plate “picks up” small pieces of crust and piles them into a mismatched collection on the west edge. As the Rockies rise, they cut off moisture to the plains to the east. As the global climate temporarily cools, glaciers cover the Midwest many times and completely reshape Illinois into a ...
Plate Tectonics - Issaquah Connect
... Boundaries are where the plates are sliding past each other. (Like two trains going past each other, I know it’s a stretch). ...
... Boundaries are where the plates are sliding past each other. (Like two trains going past each other, I know it’s a stretch). ...
MS Science - Kawameeh Middle School
... enough to form huge mountains and powerful earthquakes. • Tensional forces pull the land apart and form rift valleys and mid-ocean ridges. • Compressional forces form mountains. ...
... enough to form huge mountains and powerful earthquakes. • Tensional forces pull the land apart and form rift valleys and mid-ocean ridges. • Compressional forces form mountains. ...
View Sample - Popular Book Company
... of South America seems to fit nicely with the west coast of Africa, like two puzzle pieces? This can be explained by the theory of plate tectonics in which we believe that, millions of years ago, all the continents of the world were one big landmass called Pangaea. Pangaea began breaking up 180 mill ...
... of South America seems to fit nicely with the west coast of Africa, like two puzzle pieces? This can be explained by the theory of plate tectonics in which we believe that, millions of years ago, all the continents of the world were one big landmass called Pangaea. Pangaea began breaking up 180 mill ...
Plate Tectonics
... mountains and volcanoes When tectonic plates move apart, ocean valleys are made When tectonic plates slide against each other, earthquakes happen We’re going to need more vocabulary words ...
... mountains and volcanoes When tectonic plates move apart, ocean valleys are made When tectonic plates slide against each other, earthquakes happen We’re going to need more vocabulary words ...
Plate Tectonics Review
... • Ocean trench: when 2 plates of different density collide, the denser plate pulls the leading edge of the less dense plate • Continental shelf: flat areas that extend from the shoreline and drop off at the trench • Continental slope: the steep drop off from the shelf into the trench • Benioff zone: ...
... • Ocean trench: when 2 plates of different density collide, the denser plate pulls the leading edge of the less dense plate • Continental shelf: flat areas that extend from the shoreline and drop off at the trench • Continental slope: the steep drop off from the shelf into the trench • Benioff zone: ...
Notes: Plate Tectonics
... • Heat from the core and the mantle itself causes convection currents in the mantle. • Mantle rock rises slowly from the bottom of the mantle toward the top. The hot rock eventually cools and sinks back through the mantle. Over and over the cycle of rising and sinking takes place. • Convection curre ...
... • Heat from the core and the mantle itself causes convection currents in the mantle. • Mantle rock rises slowly from the bottom of the mantle toward the top. The hot rock eventually cools and sinks back through the mantle. Over and over the cycle of rising and sinking takes place. • Convection curre ...
3D Model of Earth`s Layers
... knowledge. Each model was to show the oceanic crust, continental crust, lithosphere, asthenosphere, lower mantle, outer core and inner core. Accompanying each model was an information sheet where the students were to list three facts about each layer of the earth that was diagramed. Also, four facts ...
... knowledge. Each model was to show the oceanic crust, continental crust, lithosphere, asthenosphere, lower mantle, outer core and inner core. Accompanying each model was an information sheet where the students were to list three facts about each layer of the earth that was diagramed. Also, four facts ...
Continental Drift - sciencewithskinner
... - Fossil evidence (coal deposits) indicate a matching tropical or subtropical swamps in the northern hemisphere 4. Seafloor spreading 5. Paleomagnetism ...
... - Fossil evidence (coal deposits) indicate a matching tropical or subtropical swamps in the northern hemisphere 4. Seafloor spreading 5. Paleomagnetism ...
Name: Class: Date: Divergent Boundaries (All answers must be in
... 3) What is the rate of spreading along the Mid-Atlantic ridge each year? ...
... 3) What is the rate of spreading along the Mid-Atlantic ridge each year? ...
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.