Sea Floor Spreading
... ex. ocean floor east of east Pacific rise older than 40 million years old has already subducted while ocean floor in the NW Pacific is about 180 years old. ...
... ex. ocean floor east of east Pacific rise older than 40 million years old has already subducted while ocean floor in the NW Pacific is about 180 years old. ...
phase_4_ip_for_sci101
... of the magnetic poles illustrated in rocks, indicates that continents have moved. This is shown in polar wandering curves. The curves for North America and Europe have similar shapes but are separated by about 240 of longitude. The difference between the paths can be reconciled if the continents are ...
... of the magnetic poles illustrated in rocks, indicates that continents have moved. This is shown in polar wandering curves. The curves for North America and Europe have similar shapes but are separated by about 240 of longitude. The difference between the paths can be reconciled if the continents are ...
Plate Tectonics - maxwellsciencenfhs
... continents which drifted apart to their present positions. ...
... continents which drifted apart to their present positions. ...
Plate Tectonics - My Teacher Pages
... • Continents are splitting apart Red Sea, Gulf of California ...
... • Continents are splitting apart Red Sea, Gulf of California ...
Seafloor Spreading
... In 1968, scientists aboard the research ship Glomar Challenger began gathering information about the rocks on the seafloor. Glomar Challengerwas equipped with a drilling rig that allowed scientists to drill into the seafloor to obtain rock samples. Scientists found that the youngest rocks are locate ...
... In 1968, scientists aboard the research ship Glomar Challenger began gathering information about the rocks on the seafloor. Glomar Challengerwas equipped with a drilling rig that allowed scientists to drill into the seafloor to obtain rock samples. Scientists found that the youngest rocks are locate ...
Journey_to_the_surface_of_the_earth_pt2
... It is metallic AND it is liquid AND in motion ALL THREE are required to produced the magnetic field – For example – Mercury has an iron core, but no magnetic field because it is solid! – Venus has a liquid iron core, but it has no magnetic field because there is very little motion within the liq ...
... It is metallic AND it is liquid AND in motion ALL THREE are required to produced the magnetic field – For example – Mercury has an iron core, but no magnetic field because it is solid! – Venus has a liquid iron core, but it has no magnetic field because there is very little motion within the liq ...
5. I can evaluate Alfred Wegner`s theory of continental drift based on
... a. I can describe the 4 pieces of evidence for plate tectonics used by Alfred Wegner b. I can evaluate Alfred Wegner’s hypothesis of continental drift c. I can explain how magnetic minerals in the Earth’s crust are evidence for continental drift. d. I can describe the role of convection currents in ...
... a. I can describe the 4 pieces of evidence for plate tectonics used by Alfred Wegner b. I can evaluate Alfred Wegner’s hypothesis of continental drift c. I can explain how magnetic minerals in the Earth’s crust are evidence for continental drift. d. I can describe the role of convection currents in ...
Earth`s Interior
... solid inner core to spin at a slightly faster rate than the spinning of the whole Earth. • Earth’s magnetic field – Caused by the core movement – Causes the planet to act like a giant bar magnet ...
... solid inner core to spin at a slightly faster rate than the spinning of the whole Earth. • Earth’s magnetic field – Caused by the core movement – Causes the planet to act like a giant bar magnet ...
1. There is a link between WHY they occur and - DP
... •Instead, the Earth is a "self-exciting dynamo," meaning that the magnetism is produced by electric currents in the outer core. •This is the magnetism that led to the generation of an electric current in the flowing iron alloy in the first place—this system perpetuates itself. ...
... •Instead, the Earth is a "self-exciting dynamo," meaning that the magnetism is produced by electric currents in the outer core. •This is the magnetism that led to the generation of an electric current in the flowing iron alloy in the first place—this system perpetuates itself. ...
Continental Drift
... – PLATE TECTONICS – surface of earth composed of “plates” (LITHOSPHERE) that move on a “conveyor belt” (ASTHENOSPHERE) ...
... – PLATE TECTONICS – surface of earth composed of “plates” (LITHOSPHERE) that move on a “conveyor belt” (ASTHENOSPHERE) ...
File
... When minerals in rocks solidify, iron-rich mineral grains will be permanently magnetized in the direction of the Earth’s magnetic field ...
... When minerals in rocks solidify, iron-rich mineral grains will be permanently magnetized in the direction of the Earth’s magnetic field ...
Unit1continetaldrift 3.40MB 2017-03-29 12:41:28
... As Wegener developed his ideas on the movement of continents it became clear that about 300 million years ago the continents were a single landmass called Pangaea. Over the next 100 million years this landmass drifted apart forming two distinct regions: Laurasia – In the Northern Hemisphere, made ...
... As Wegener developed his ideas on the movement of continents it became clear that about 300 million years ago the continents were a single landmass called Pangaea. Over the next 100 million years this landmass drifted apart forming two distinct regions: Laurasia – In the Northern Hemisphere, made ...
Plate Tectonics - for Jack L. Pierce
... It is extremely crucial that you understand the meaning of various vocabulary words to gain full comprehension of the chapter’s content. Briefly define each vocabulary term, IN YOUR OWN WORDS, found at the end of the chapter. Use a separate pieces of paper. C. Chapter Questions 2 pts each / -10 pts ...
... It is extremely crucial that you understand the meaning of various vocabulary words to gain full comprehension of the chapter’s content. Briefly define each vocabulary term, IN YOUR OWN WORDS, found at the end of the chapter. Use a separate pieces of paper. C. Chapter Questions 2 pts each / -10 pts ...
File
... 1) One theory about the formation of the continents is that all of the continents were at one time joined together in a huge land mass, called ________________________ (which means ________________________________), and it broke apart about ______________________________ years ago. 2) The theory of ...
... 1) One theory about the formation of the continents is that all of the continents were at one time joined together in a huge land mass, called ________________________ (which means ________________________________), and it broke apart about ______________________________ years ago. 2) The theory of ...
PLATE TECTONICS
... FIGURE 3.2 Fossils of the freshwater reptile Mesosaurus, 300 million years old, are found in South America and Africa and nowhere else in the world. If Mesosaurus could swim across the South Atlantic Ocean, it should have been able to cross other oceans and should have spread more ...
... FIGURE 3.2 Fossils of the freshwater reptile Mesosaurus, 300 million years old, are found in South America and Africa and nowhere else in the world. If Mesosaurus could swim across the South Atlantic Ocean, it should have been able to cross other oceans and should have spread more ...
Commotion Beneath the Ocean
... So what do the ridges have to do with plate movement? • Undersea volcanoes • Deposit molten rock from mantle convection • Seafloor spreading Supported Theory of Plate Tectonics 1962 - Harry Hess ...
... So what do the ridges have to do with plate movement? • Undersea volcanoes • Deposit molten rock from mantle convection • Seafloor spreading Supported Theory of Plate Tectonics 1962 - Harry Hess ...
AICE Env Day 5 Evidence of Plate Tectonics Stations
... underwater objects and then records the echoes of these sound waves. The mid-ocean ridges curve along the sea floor, extending into all of Earth’s oceans. Most of the mountains in the mid-ocean ridges lie hidden under hundreds of meters of water. A steep-sided valley splits the top of some mid-ocean ...
... underwater objects and then records the echoes of these sound waves. The mid-ocean ridges curve along the sea floor, extending into all of Earth’s oceans. Most of the mountains in the mid-ocean ridges lie hidden under hundreds of meters of water. A steep-sided valley splits the top of some mid-ocean ...
Seafloor Spreading and Plate Tectonics
... • Confirmed for some by Vine and Matthews (1963): the “tape recorder” model: ...
... • Confirmed for some by Vine and Matthews (1963): the “tape recorder” model: ...
PLATE TECTONICS
... Wegener observed that 1) the coastlines of some continents fit like a jigsaw puzzle, and 2) similar fossils are found on opposite sides of the Atlantic. But he could not explain why continents would drift. • In 1959, Harry Hess proposed seafloor spreading: molten rock seeps up from the mantle ...
... Wegener observed that 1) the coastlines of some continents fit like a jigsaw puzzle, and 2) similar fossils are found on opposite sides of the Atlantic. But he could not explain why continents would drift. • In 1959, Harry Hess proposed seafloor spreading: molten rock seeps up from the mantle ...
Section Quiz - TheVirtualNeal
... walls tend to push above the footwall. Answers will vary. Sample answer: Molten rock at mid-ocean ridges has magnetized minerals that align with Earth’s magnetic field. When the Earth’s magnetic field reverses, the magnetized minerals align in the opposite direction. The record of magnetic reversals ...
... walls tend to push above the footwall. Answers will vary. Sample answer: Molten rock at mid-ocean ridges has magnetized minerals that align with Earth’s magnetic field. When the Earth’s magnetic field reverses, the magnetized minerals align in the opposite direction. The record of magnetic reversals ...
Seafloor Spreading and Paleomagnetism
... Eventually, this newly formed ocean crust is carried away from the mid-oceanic ridge by the spreading seafloor. It is recycled millions of years later when it returns to the mantle by descending into the deep ocean trenches. Persuasive evidence to support seafloor spreading soon followed Hess’ hypot ...
... Eventually, this newly formed ocean crust is carried away from the mid-oceanic ridge by the spreading seafloor. It is recycled millions of years later when it returns to the mantle by descending into the deep ocean trenches. Persuasive evidence to support seafloor spreading soon followed Hess’ hypot ...
Answer Key - Scioly.org
... respectively (2). The basin and range has above normal elevation and below average crustal thickness, so it is not in isostatic equilibrium (2). Rather, it is supported by dynamic upwelling of mantle asthenosphere beneath it, which is also causing the extension (2). Products of erosion of the ranges ...
... respectively (2). The basin and range has above normal elevation and below average crustal thickness, so it is not in isostatic equilibrium (2). Rather, it is supported by dynamic upwelling of mantle asthenosphere beneath it, which is also causing the extension (2). Products of erosion of the ranges ...
theory of continental drift
... • The theory of plate tectonics is relatively new • Early 1900s, Alfred Wegener first developed a theory of continental drift based on a collection of evidence from rocks and fossils found on continents separated by vast distances • 1928, Arthur Holmes proposed a mechanism to explain how the contine ...
... • The theory of plate tectonics is relatively new • Early 1900s, Alfred Wegener first developed a theory of continental drift based on a collection of evidence from rocks and fossils found on continents separated by vast distances • 1928, Arthur Holmes proposed a mechanism to explain how the contine ...
Geomagnetic reversal
A geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was the opposite. These periods are called chrons. The time spans of chrons are randomly distributed with most being between 0.1 and 1 million years with an average of 450,000 years. Most reversals are estimated to take between 1,000 and 10,000 years.The latest one, the Brunhes–Matuyama reversal, occurred 780,000 years ago;and may have happened very quickly, within a human lifetime. A brief complete reversal, known as the Laschamp event, occurred only 41,000 years ago during the last glacial period. That reversal lasted only about 440 years with the actual change of polarity lasting around 250 years. During this change the strength of the magnetic field dropped to 5% of its present strength. Brief disruptions that do not result in reversal are called geomagnetic excursions.