The Theory of Plate Tectonics
... •Core (Inner and outer) •Mantle •Crust (Oceanic and Continental) ...
... •Core (Inner and outer) •Mantle •Crust (Oceanic and Continental) ...
Document
... Trenches are long, narrow, deep-cutting canyons (8 to 10 km deep) formed by slab pull (negative buoyancy) as the old, cold lithosphere descends into the hotter, less dense asthenosphere. The older, colder, denser the oceanic crust, the deeper the trench! (Basically, the mantle is pulling downwar ...
... Trenches are long, narrow, deep-cutting canyons (8 to 10 km deep) formed by slab pull (negative buoyancy) as the old, cold lithosphere descends into the hotter, less dense asthenosphere. The older, colder, denser the oceanic crust, the deeper the trench! (Basically, the mantle is pulling downwar ...
Plate Tectonics Links together 2 theories
... Pacific Plate is largest 1/5 of Earth’s surface containing Los Angeles, California ...
... Pacific Plate is largest 1/5 of Earth’s surface containing Los Angeles, California ...
File
... A rise in temperature prodeced by friction 2. A drop in pressure reduces the melting point 3. The presence of liquids reduces the melting point Magma from deep mantle is released at mid-ocean ridges, rifts and hot spots.This magma is rich in iron and magnesium and has a low fluid content.The magma f ...
... A rise in temperature prodeced by friction 2. A drop in pressure reduces the melting point 3. The presence of liquids reduces the melting point Magma from deep mantle is released at mid-ocean ridges, rifts and hot spots.This magma is rich in iron and magnesium and has a low fluid content.The magma f ...
oceans
... – thin outer layer • less dense, rocks that floated to the surface when the Earth was formed • between 35km and 70km thick. – not a continuous layer of rock • Split into plates, which are free to drift slowly across the surface of the planet. ...
... – thin outer layer • less dense, rocks that floated to the surface when the Earth was formed • between 35km and 70km thick. – not a continuous layer of rock • Split into plates, which are free to drift slowly across the surface of the planet. ...
Volcanoes and Igneous Activity Earth - Chapter 4
... – Average about 5 centimeters (2 inches) per ...
... – Average about 5 centimeters (2 inches) per ...
- GPlates
... to the Java-Sunda subduction zone. Recent models, including Hall (2012), argue that subduction was not active along this margin during this time, but the continuous subducted slab features suggest otherwise - assuming average sinking velocities of 3 and 1.2 cm/yr for the upper and lower mantle, resp ...
... to the Java-Sunda subduction zone. Recent models, including Hall (2012), argue that subduction was not active along this margin during this time, but the continuous subducted slab features suggest otherwise - assuming average sinking velocities of 3 and 1.2 cm/yr for the upper and lower mantle, resp ...
Plate Tectonics - Helena High School
... Antarctica, therefore Antarctica must have been closer to the equator at one time. ...
... Antarctica, therefore Antarctica must have been closer to the equator at one time. ...
The Earth`s Tectonic Plates and Continental Drift
... Ridge Push – At mid-ocean ridges, the oceanic lithosphere is higher than it is where it sinks into the asthenosphere. Because of ridge push, the oceanic lithosphere slides downhill under the force of gravity. Slab Pull – Because oceanic lithosphere is denser than the asthenosphere, the edge of the t ...
... Ridge Push – At mid-ocean ridges, the oceanic lithosphere is higher than it is where it sinks into the asthenosphere. Because of ridge push, the oceanic lithosphere slides downhill under the force of gravity. Slab Pull – Because oceanic lithosphere is denser than the asthenosphere, the edge of the t ...
Dynamic Earth Interactive: Plate Tectonics
... http://www.learner.org/interactives/dynamicearth/index.html Be sure to follow each link all the way, roll your mouse over the diagrams wherever it says to do so, and take each “Challenge”. Make sketches to complement your notes as you see fit. Earth’s Structure 1. The outermost layer of the Earth is ...
... http://www.learner.org/interactives/dynamicearth/index.html Be sure to follow each link all the way, roll your mouse over the diagrams wherever it says to do so, and take each “Challenge”. Make sketches to complement your notes as you see fit. Earth’s Structure 1. The outermost layer of the Earth is ...
Pl Tec Study Guide
... _____ Java and Sumatra _____ The Aleutian Islands 4. What happens when two continents converge? 5. What happens at oceanic-continental convergent plate boundary? 6. What is the source of the material which is melted and later erupted at island arc volcanoes? 7. Where do island arcs form? 8. Give an ...
... _____ Java and Sumatra _____ The Aleutian Islands 4. What happens when two continents converge? 5. What happens at oceanic-continental convergent plate boundary? 6. What is the source of the material which is melted and later erupted at island arc volcanoes? 7. Where do island arcs form? 8. Give an ...
Slide 1
... more than a dozen slabs of rock called plates that rest on layer of the upper mantle -these plates carry earth’s oceans & continents ...
... more than a dozen slabs of rock called plates that rest on layer of the upper mantle -these plates carry earth’s oceans & continents ...
Plate Tectonics
... Transform Boundaries • 2 plates slide past each other, moving in opposite directions • Along these boundaries, crust is neither created or destroyed • Earthquakes occur here ...
... Transform Boundaries • 2 plates slide past each other, moving in opposite directions • Along these boundaries, crust is neither created or destroyed • Earthquakes occur here ...
Chap02 2 TECTONICS OF TAIWAN
... along the decollement. Figure 2.4 shows an image of faulting. The initial break which started around the hypocenter propagated upward along the Chelungpu fault, and downward along the decollement. The rupture within the prism should be slow already. If not, severe damages would have occurred around ...
... along the decollement. Figure 2.4 shows an image of faulting. The initial break which started around the hypocenter propagated upward along the Chelungpu fault, and downward along the decollement. The rupture within the prism should be slow already. If not, severe damages would have occurred around ...
Chapter 3 Plate Tectonics Study Guide – Test Friday Oct 21
... Convergent boundary between two continental plates produces… ...
... Convergent boundary between two continental plates produces… ...
Chapter 5 Study Guide Answers!!
... The tectonic plates move at a rates ranging from 1 to 12 ____ per ____. ...
... The tectonic plates move at a rates ranging from 1 to 12 ____ per ____. ...
Earth*s Structure
... 10. What evidence did Wegner find that supports the hypothesis that the Earth’s continents were once joined in a single large landmass? ...
... 10. What evidence did Wegner find that supports the hypothesis that the Earth’s continents were once joined in a single large landmass? ...
PRACTICE Test: Earth Science INSTRUCTIONS - Ms
... PART 2: MULTIPLE CHOICE (1 mark each = 22 marks) Please circle the best answer. 1. Which of the following is not a reason for natural climate change? a. changing ocean currents b. the composition of Earth’s atmosphere c. Earth’s tilt, rotation, and orbit around the Sun d. the increase in greenhouse ...
... PART 2: MULTIPLE CHOICE (1 mark each = 22 marks) Please circle the best answer. 1. Which of the following is not a reason for natural climate change? a. changing ocean currents b. the composition of Earth’s atmosphere c. Earth’s tilt, rotation, and orbit around the Sun d. the increase in greenhouse ...
Continental Drift and Plate Tectonics ANSWER KEY
... coast of the USA and the Andes Mountains of South America and deep ocean trenches such as the Marianas Trench. 11.) Diverging plates create: mid ocean ridges such as the Mid-Atlantic ridge that runs north to south along the middle of the Atlantic Ocean between North and South America and Europe and ...
... coast of the USA and the Andes Mountains of South America and deep ocean trenches such as the Marianas Trench. 11.) Diverging plates create: mid ocean ridges such as the Mid-Atlantic ridge that runs north to south along the middle of the Atlantic Ocean between North and South America and Europe and ...
Theory of Plate Tectonics II
... boundaries evolving over time, because the time scale is too great, but: ...
... boundaries evolving over time, because the time scale is too great, but: ...
Chapter 7.1
... • Sometimes conditions (lower pressure or added water) allow part of the solid mantle to melt and become flowing liquid magma. ...
... • Sometimes conditions (lower pressure or added water) allow part of the solid mantle to melt and become flowing liquid magma. ...
Benchmark 1 Study Guide 6th Grade Earth Science Mr. Ventiquattro
... 15. Know that lithospheric plates is a term interchangeable with tectonic plates 16. Convergent plates, move towards each other 17. Divergent plates, move away from each other 18. Convergent subduction, ocean plate hits continental plate and ocean plate sinks back into mantle ...
... 15. Know that lithospheric plates is a term interchangeable with tectonic plates 16. Convergent plates, move towards each other 17. Divergent plates, move away from each other 18. Convergent subduction, ocean plate hits continental plate and ocean plate sinks back into mantle ...
Section 9.5 Mechanism for Plate Tectonics
... oceanic crust sinks into the mantle and “pulls” the trailing lithosphere along. It is thought to be the primary downward arm of convective flow in the mantle. Ridge-push causes oceanic lithosphere to slide down the sides of the oceanic ridge under the pull of gravity. It may contribute to plate moti ...
... oceanic crust sinks into the mantle and “pulls” the trailing lithosphere along. It is thought to be the primary downward arm of convective flow in the mantle. Ridge-push causes oceanic lithosphere to slide down the sides of the oceanic ridge under the pull of gravity. It may contribute to plate moti ...
PLATE TECTONICS
... Magnetic signature is “locked in” as rock solidifies Subsequent pole reversals do not change the mineral alignment in solid rock ...
... Magnetic signature is “locked in” as rock solidifies Subsequent pole reversals do not change the mineral alignment in solid rock ...
Oceanic trench
The oceanic trenches are hemispheric-scale long but narrow topographic depressions of the sea floor. They are also the deepest parts of the ocean floor. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries, along which lithospheric plates move towards each other at rates that vary from a few mm to over ten cm per year. A trench marks the position at which the flexed, subducting slab begins to descend beneath another lithospheric slab. Trenches are generally parallel to a volcanic island arc, and about 200 km (120 mi) from a volcanic arc. Oceanic trenches typically extend 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic floor. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench, at a depth of 11,034 m (36,201 ft) below sea level. Oceanic lithosphere moves into trenches at a global rate of about 3 km2/yr.