Structure of the Earth Tectonics
... Flows due to less pressure Rotation of Earth stirs up core material Produces magnetic field (flowing electrical charge) ...
... Flows due to less pressure Rotation of Earth stirs up core material Produces magnetic field (flowing electrical charge) ...
What is the Plate Tectonic Theory?
... • Adds to Wegener’s Theory of Continental Drift. • States the lithosphere is divided into broken pieces (tectonic plates) that are shifting over the asthenosphere (upper mantle). ...
... • Adds to Wegener’s Theory of Continental Drift. • States the lithosphere is divided into broken pieces (tectonic plates) that are shifting over the asthenosphere (upper mantle). ...
Continental Drift and Plate Tectonics ANSWER KEY
... 7.) What happens after it rises? It cools then sinks back towards the core where it becomes heated again. This continuous movement is called a convection current or cycle. 8.) Convection causes the crustal plates to move like a conveyor belt in these three directions: a. ...
... 7.) What happens after it rises? It cools then sinks back towards the core where it becomes heated again. This continuous movement is called a convection current or cycle. 8.) Convection causes the crustal plates to move like a conveyor belt in these three directions: a. ...
Plate Tectonics What is it and what makes it work?
... Plate Tectonics What is it and what makes it work? Steven Earle, Geology Department Malaspina University-College ...
... Plate Tectonics What is it and what makes it work? Steven Earle, Geology Department Malaspina University-College ...
Ch.4 Notes
... why is this important to Alfred Wegeners idea of continental drift It should take at least 2 paragraphs to explain it in detail. ...
... why is this important to Alfred Wegeners idea of continental drift It should take at least 2 paragraphs to explain it in detail. ...
Plate Tectonics Notes
... This layer is known as the _____________ A _________ is one of numerous rigid sections of the _____________ that move as a unit over the material of the _ _ _ __ _ _ _ _ _ _ _ _ _ _ Types of Plate Boundaries __________________ (also called spreading centers) are the place where two plates move apar ...
... This layer is known as the _____________ A _________ is one of numerous rigid sections of the _____________ that move as a unit over the material of the _ _ _ __ _ _ _ _ _ _ _ _ _ _ Types of Plate Boundaries __________________ (also called spreading centers) are the place where two plates move apar ...
Continental Drift Theory and Plate Tectonics
... the Earth's outer shell is not one solid sheet of rock but a series of large and small moving plates. • What did scientists realize when they “connected the dots?” ...
... the Earth's outer shell is not one solid sheet of rock but a series of large and small moving plates. • What did scientists realize when they “connected the dots?” ...
Chapter 17 - MrFuglestad
... Scientists also found that there is more sediment on the sea floor as you move away from the Mid-Ocean ridge. Scientists map the age of the rocks on the ocean floor with isochrons. An isochron is line on a map that connects points that have the same age. ...
... Scientists also found that there is more sediment on the sea floor as you move away from the Mid-Ocean ridge. Scientists map the age of the rocks on the ocean floor with isochrons. An isochron is line on a map that connects points that have the same age. ...
Earth`s Structure
... Reverses aperiodically 9 reversals in last 4 million years Some last millions of years, some thousands Reverses full strength then decays to nothing for a few thousand years ...
... Reverses aperiodically 9 reversals in last 4 million years Some last millions of years, some thousands Reverses full strength then decays to nothing for a few thousand years ...
Name
... The density of a substance can be measured using the unit of grams per cubic centimeter, or g/cm3. The density of the core is about 10 to 13 g/cm3. The density of the mantle is about 3.3 to 5.7 g/ g/cm3. Which is the BEST estimate for the density of the crust? ...
... The density of a substance can be measured using the unit of grams per cubic centimeter, or g/cm3. The density of the core is about 10 to 13 g/cm3. The density of the mantle is about 3.3 to 5.7 g/ g/cm3. Which is the BEST estimate for the density of the crust? ...
Slide 1 - My Teacher Pages
... lithosphere forms • Magma rises to the surface through the mid-ocean ridge forming new oceanic crust • Tectonic plates spread apart and magma fills the gap. • As new crust forms older crust moves away from the M.O.R. ...
... lithosphere forms • Magma rises to the surface through the mid-ocean ridge forming new oceanic crust • Tectonic plates spread apart and magma fills the gap. • As new crust forms older crust moves away from the M.O.R. ...
Science 8th Grade - Holy Family School | Phoenixville, PA
... further away from the mid-ocean ridge, the older the samples ...
... further away from the mid-ocean ridge, the older the samples ...
Restless Continents
... lithosphere forms • Magma rises to the surface through the mid-ocean ridge forming new oceanic crust • Tectonic plates spread apart and magma fills the gap. • As new crust forms older crust moves away from the M.O.R. ...
... lithosphere forms • Magma rises to the surface through the mid-ocean ridge forming new oceanic crust • Tectonic plates spread apart and magma fills the gap. • As new crust forms older crust moves away from the M.O.R. ...
The Earth`s Interior & Plate Tectonics
... The mantle extends about half way to the center. It's made of solid rock and behaves like an viscous liquid. The convection of heat from the center of the Earth is what ultimately drives the movement of the tectonic plates and cause mountains to rise. ...
... The mantle extends about half way to the center. It's made of solid rock and behaves like an viscous liquid. The convection of heat from the center of the Earth is what ultimately drives the movement of the tectonic plates and cause mountains to rise. ...
Continental Drift 1 The hypothesis that all the continents were once
... The geologist whose theory stated that the plates are in slow constant motion, driven by convection currents in the mantle. (Plate Tectonics) A trace of an organism preserved in ...
... The geologist whose theory stated that the plates are in slow constant motion, driven by convection currents in the mantle. (Plate Tectonics) A trace of an organism preserved in ...
Inside the Restless Earth
... 12. For each of the boundaries diagramed above, explain what happens at each of these boundaries and give a real-world example of each one. ...
... 12. For each of the boundaries diagramed above, explain what happens at each of these boundaries and give a real-world example of each one. ...
Chapter 21 – Section 1 - Earth`s Interior and Plate Tectonics
... Assuming that New York was originally “connected” to the west coast of Africa…calculate the number of years that it took for them to reach their current locations, 6.76 x 10 8 cm apart, if the sea floor is spreading an average of 4 cm per year: ...
... Assuming that New York was originally “connected” to the west coast of Africa…calculate the number of years that it took for them to reach their current locations, 6.76 x 10 8 cm apart, if the sea floor is spreading an average of 4 cm per year: ...
Geo 1-2 Tectonic Plates Notes
... Plate Tectonics • Theory that earth’s outer shell (crust) is not one solid sheet of rock…more like a jigsaw puzzle • Each plate moves separately – Movements can lead to earthquakes, volcanoes and more ...
... Plate Tectonics • Theory that earth’s outer shell (crust) is not one solid sheet of rock…more like a jigsaw puzzle • Each plate moves separately – Movements can lead to earthquakes, volcanoes and more ...
Plate Tectonics Study Guide
... That all the continents were once connected in a supercontinent called Pangaea 4. What evidence is there to support Wegener’s theory? List 3 things. 1. Fossils 2. Land Features 3. Climate change 5. Where do we find evidence of sea-floor spreading? At mid-ocean ridges 6. What causes the earth’s plate ...
... That all the continents were once connected in a supercontinent called Pangaea 4. What evidence is there to support Wegener’s theory? List 3 things. 1. Fossils 2. Land Features 3. Climate change 5. Where do we find evidence of sea-floor spreading? At mid-ocean ridges 6. What causes the earth’s plate ...
Chapter 5 Test
... Tectonic plates can be made up of what two types of crust? At a mid-ocean ridge, the two plates are____________________________? In seafloor spreading the oldest rocks are found where? The major lithospheric plate the continental United States sits on is called______________ plate. At divergent boun ...
... Tectonic plates can be made up of what two types of crust? At a mid-ocean ridge, the two plates are____________________________? In seafloor spreading the oldest rocks are found where? The major lithospheric plate the continental United States sits on is called______________ plate. At divergent boun ...
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.