the earth`s life support systems - sohs
... • Huge volumes of heated and molten rack moving around the earth’s interior form massive solid plates that move extremely slowly across the earth’s surface. – Tectonic plates: huge rigid plates that are moved with convection cells or currents by floating on magma or molten rock. ...
... • Huge volumes of heated and molten rack moving around the earth’s interior form massive solid plates that move extremely slowly across the earth’s surface. – Tectonic plates: huge rigid plates that are moved with convection cells or currents by floating on magma or molten rock. ...
Chapter 4 Case Studies and Study Guide: Continental Drift and
... Oceanic lithosphere is consumed in subduction zones that are characterized by deep seafloor trenches. Accretionary prisms form behind the trench. Oceanic lithosphere becomes denser and thicker with age until subduction eventually starts. Only oceanic lithosphere subducts. Continental lithosphere is ...
... Oceanic lithosphere is consumed in subduction zones that are characterized by deep seafloor trenches. Accretionary prisms form behind the trench. Oceanic lithosphere becomes denser and thicker with age until subduction eventually starts. Only oceanic lithosphere subducts. Continental lithosphere is ...
Rift Valleys (1)
... Cycle of mountain building: (1)Erosion- rocks of the land are weathered and eroded by rivers, waves, glaciers and wind. (2)Deposition- sedimentary and volcanic rocks are deposited on ocean floor where they accumulate. (3) Deformation- as the crust of the ocean floor slides under the continent in the ...
... Cycle of mountain building: (1)Erosion- rocks of the land are weathered and eroded by rivers, waves, glaciers and wind. (2)Deposition- sedimentary and volcanic rocks are deposited on ocean floor where they accumulate. (3) Deformation- as the crust of the ocean floor slides under the continent in the ...
Plate Tectonics
... Theory of Continental Drift • A Dutch cartographer, Ortelius, noted the fit of the coastlines of Africa and S. America. • In 1912, Alfred Wegener thought that the shape of the continents was no coincidence. • He proposed his idea of continental drift to scientists, but couldn’t tell them why they f ...
... Theory of Continental Drift • A Dutch cartographer, Ortelius, noted the fit of the coastlines of Africa and S. America. • In 1912, Alfred Wegener thought that the shape of the continents was no coincidence. • He proposed his idea of continental drift to scientists, but couldn’t tell them why they f ...
geology exam is - Spring Branch ISD
... 1. Name one mineral that you can scratch with your fingernail. 2. Which mineral can scratch anything? ...
... 1. Name one mineral that you can scratch with your fingernail. 2. Which mineral can scratch anything? ...
File
... Millions of years ago, these mountain peaks didn’t exist. The Asian continent was mostly intact, but India was an island floating off the coast of Australia. Around 220 million years ago, around the time that Pangea was breaking apart, India started to move northwards. It travelled some 6,000 kilome ...
... Millions of years ago, these mountain peaks didn’t exist. The Asian continent was mostly intact, but India was an island floating off the coast of Australia. Around 220 million years ago, around the time that Pangea was breaking apart, India started to move northwards. It travelled some 6,000 kilome ...
PLATE TECTONICS TEST 1 ES1
... *B__16. Two plates move past each other and crust is neither created nor destroyed along:! a. convergent plate boundaries b. transform fault boundaries! c. divergent plate boundaries! d. deep ocean trenches! ...
... *B__16. Two plates move past each other and crust is neither created nor destroyed along:! a. convergent plate boundaries b. transform fault boundaries! c. divergent plate boundaries! d. deep ocean trenches! ...
Word format
... C. continental drift D. paleomagnetic reversals E. jigsaw geology Evidence that North America used to be connected to Europe is given by the fact that the following two mountain chains seem to match up from one continent to the other when they are brought back together: A. Rockies and Caledonides B. ...
... C. continental drift D. paleomagnetic reversals E. jigsaw geology Evidence that North America used to be connected to Europe is given by the fact that the following two mountain chains seem to match up from one continent to the other when they are brought back together: A. Rockies and Caledonides B. ...
Chapter 3 Test Review
... A. a convergent boundary B. a strike-slip boundary C. a transform boundary D. a divergent boundary ...
... A. a convergent boundary B. a strike-slip boundary C. a transform boundary D. a divergent boundary ...
Convection and the Hemispheric Dichotomy: Any Links, or Just B.S.?
... Chandrasekhar, 1961 “It has been suggested that at an early stage in the history of its formation, the Earth was a nearly homogeneous fluid sphere with convective motions of the type we have just described; and, further, that we can infer the existence, at one time, of such motions from the divisio ...
... Chandrasekhar, 1961 “It has been suggested that at an early stage in the history of its formation, the Earth was a nearly homogeneous fluid sphere with convective motions of the type we have just described; and, further, that we can infer the existence, at one time, of such motions from the divisio ...
Plate Tectonics Convergent Boundary
... An oceanic collision is when tectonic oceanic plates collide. The oceanic plate is forced down into the mantle in a process known as “subduction”. As the plates descends, it is forced into a higher temperature environment which causes melting of the crust forming magma. (geology.com) ...
... An oceanic collision is when tectonic oceanic plates collide. The oceanic plate is forced down into the mantle in a process known as “subduction”. As the plates descends, it is forced into a higher temperature environment which causes melting of the crust forming magma. (geology.com) ...
1 Mountains and Mountain Ranges
... • 190 mya (Jurassic) South America moves west • By 140 mya, Pacific plate had subducted to accommodate motion • By 130 mya, descending plate creates lots of basaltic magma ...
... • 190 mya (Jurassic) South America moves west • By 140 mya, Pacific plate had subducted to accommodate motion • By 130 mya, descending plate creates lots of basaltic magma ...
Unit 2 - Todd County Schools
... a. only asthenosphere. b. only oceanic crust. c. only continental crust. d. both oceanic and continental crust. ...
... a. only asthenosphere. b. only oceanic crust. c. only continental crust. d. both oceanic and continental crust. ...
Earth Systems and Plate Tectonics Study Guide Name 6th Grade
... Types of Plate Interactions 16. Where are the plates of the Earth located? (What is this section of the crust called?) ...
... Types of Plate Interactions 16. Where are the plates of the Earth located? (What is this section of the crust called?) ...
Layers of the Earth
... The earth is composed of four different layers. Many geologists believe that as the Earth cooled the heavier, denser materials sank to the center and the lighter materials rose to the top. Because of this, the crust is made of the lightest materials (rock basalts and granites) and the core consists ...
... The earth is composed of four different layers. Many geologists believe that as the Earth cooled the heavier, denser materials sank to the center and the lighter materials rose to the top. Because of this, the crust is made of the lightest materials (rock basalts and granites) and the core consists ...
Plate Tectonics, Tsunamis, and Earthquakes
... • A tsunami is a series of sea waves most commonly caused by an earthquake beneath the sea floor • In the open ocean, tsunami waves travel at speeds of up to 600 miles per hour • The first wave is often not the largest • Successive waves may be spaced many minutes (up to 30-40 mins) apart and contin ...
... • A tsunami is a series of sea waves most commonly caused by an earthquake beneath the sea floor • In the open ocean, tsunami waves travel at speeds of up to 600 miles per hour • The first wave is often not the largest • Successive waves may be spaced many minutes (up to 30-40 mins) apart and contin ...
Chapter 4 lesson 1
... A type of fault in which rocks on either side move past each other in opposite directions with little up or down motion ...
... A type of fault in which rocks on either side move past each other in opposite directions with little up or down motion ...
Natural Disasters
... The mantle contains MORE Fe and Mg than the oceanic crust and the oceanic crust contains MORE Fe and Mg than the continental crust. Because Fe and Mg are DENSER elements, the mantle is denser than the oceanic crust and the oceanic crust is denser than the continental crust. ...
... The mantle contains MORE Fe and Mg than the oceanic crust and the oceanic crust contains MORE Fe and Mg than the continental crust. Because Fe and Mg are DENSER elements, the mantle is denser than the oceanic crust and the oceanic crust is denser than the continental crust. ...
earths_interior
... The earth’s rotation flung the lighter elements towards the surface. So the earth layers are caused by density. This process is called differentiation. ...
... The earth’s rotation flung the lighter elements towards the surface. So the earth layers are caused by density. This process is called differentiation. ...
12.002 Physics and Chemistry of the Earth and Terrestrial Planets
... e) How does this help you to answer the last question in problem 1. ...
... e) How does this help you to answer the last question in problem 1. ...
Semester 1 Exam Study Guide Stars ESS1-1 1) HS-ESS1
... 21) Which one of the following most accurately describes the volcanoes of the Hawaiian Islands. A. stratovolcanoes associated with subduction and a convergent plate boundary B. shield volcanoes associated with a mid-Pacific ridge and spreading center C. shield volcanoes fed by a long-lived hot spot ...
... 21) Which one of the following most accurately describes the volcanoes of the Hawaiian Islands. A. stratovolcanoes associated with subduction and a convergent plate boundary B. shield volcanoes associated with a mid-Pacific ridge and spreading center C. shield volcanoes fed by a long-lived hot spot ...
Chapter 28 Plate Tectonics Lab
... deep ocean trenches. Some mid-ocean ridges are labeled as rises (i.e., the East Pacific Rise). List one example of each from your map in the second column in the table below. 2. In the third column, list which kind of plate boundary is associated with each feature. The map on the last page of this l ...
... deep ocean trenches. Some mid-ocean ridges are labeled as rises (i.e., the East Pacific Rise). List one example of each from your map in the second column in the table below. 2. In the third column, list which kind of plate boundary is associated with each feature. The map on the last page of this l ...
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.