plate tectonics crossword
... 1. The primary force that causes the seafloor to spread and continents to drift. 2. Plate _____________. 4. ______________ zones. Places where the seafloor is forced under continental plates. 5. Section of the Earth below the crust. 7. Paleontologists noticed that these were the same on different co ...
... 1. The primary force that causes the seafloor to spread and continents to drift. 2. Plate _____________. 4. ______________ zones. Places where the seafloor is forced under continental plates. 5. Section of the Earth below the crust. 7. Paleontologists noticed that these were the same on different co ...
Plate Tectonic, Earthquakes, and Volcanoes Test Review
... Asthenosphere Mesosphere 4. Who discovered the theory of continental drift? When did he do this? Alfred Wegener (early 1900’s) 5. What are the three pieces of evidence that he used to support his theory? Give examples. 1. Landforms from other continents fit well together like puzzle pieces (South Am ...
... Asthenosphere Mesosphere 4. Who discovered the theory of continental drift? When did he do this? Alfred Wegener (early 1900’s) 5. What are the three pieces of evidence that he used to support his theory? Give examples. 1. Landforms from other continents fit well together like puzzle pieces (South Am ...
Ocean Vocabulary
... beyond every few years, characterized by the appearance of unusually warm, nutrient-poor water off northern Peru and Ecuador, typically in late December. Hydrothermal vents - An opening in the sea floor out of which heated mineral-rich water flows. Oceanic ridge - An elevated region with a central v ...
... beyond every few years, characterized by the appearance of unusually warm, nutrient-poor water off northern Peru and Ecuador, typically in late December. Hydrothermal vents - An opening in the sea floor out of which heated mineral-rich water flows. Oceanic ridge - An elevated region with a central v ...
Plate Tectonics - Effingham County Schools
... • Extremely thick and contains most of the Earth’s mass. • Scientist look on the ocean floor where molten rock from the mantle flows out of active volcanoes • Asthenosphere- a layer of hotter, softer rock in the upper mantle. ...
... • Extremely thick and contains most of the Earth’s mass. • Scientist look on the ocean floor where molten rock from the mantle flows out of active volcanoes • Asthenosphere- a layer of hotter, softer rock in the upper mantle. ...
Sea-Floor Spreading 49
... prominent. The cat’s “elbow” joint is most prominent. You can tell equivalent joints by the bones that make up the joint. 4. Limb changes are most extreme in the dolphin. It is the only mammal shown that moves exclusively through water. ...
... prominent. The cat’s “elbow” joint is most prominent. You can tell equivalent joints by the bones that make up the joint. 4. Limb changes are most extreme in the dolphin. It is the only mammal shown that moves exclusively through water. ...
Earth Science Chapter 20 20.1 The Water Planet 20.1 The Water
... •Water in the Artic is less salty than the other oceans. •Pacific is the largest and deepest •The 2nd is the Atlantic which contains the Mediterranean, Caribbean, Gulf of Mexico and Baltic Sea. ...
... •Water in the Artic is less salty than the other oceans. •Pacific is the largest and deepest •The 2nd is the Atlantic which contains the Mediterranean, Caribbean, Gulf of Mexico and Baltic Sea. ...
SGES 1302 Lecture6 - Department Of Geology
... The basaltic lavas that make up the ocean floor were discovered to be less than 180 million years old, and the amount of sediments in the ocean basins were much thinner than expected. The ocean floor was not flat and featureless as expected. Numerous oceanographic surveys revealed that a great subma ...
... The basaltic lavas that make up the ocean floor were discovered to be less than 180 million years old, and the amount of sediments in the ocean basins were much thinner than expected. The ocean floor was not flat and featureless as expected. Numerous oceanographic surveys revealed that a great subma ...
Tectonic Landforms
... to form a chain of volcanic islands. • Where the edge of the subducting plate is curved in shape (the Pacific Plate) = The islands form an arc. ...
... to form a chain of volcanic islands. • Where the edge of the subducting plate is curved in shape (the Pacific Plate) = The islands form an arc. ...
Chapter 10-11 Study Notes
... • Sea-floor spreading is the process by which new _______ lithosphere_______. – ocean – forms ...
... • Sea-floor spreading is the process by which new _______ lithosphere_______. – ocean – forms ...
Sea Floor Spreading Barrows
... underwater mountains that extend into all of Earth’s oceans. They are more than 50,000 km long Most are under hundreds of meters of water They reach the surface in a few places such as Iceland. Rift Valley - A steep sided valley splits the top of some mid-ocean ridges. ...
... underwater mountains that extend into all of Earth’s oceans. They are more than 50,000 km long Most are under hundreds of meters of water They reach the surface in a few places such as Iceland. Rift Valley - A steep sided valley splits the top of some mid-ocean ridges. ...
Chapter 17 Geo Reading Questions KEY
... 2. What are the relationships among mantle convection, ocean ridges, and subduction zones? Upward mantle convection is thought to be associated with ridges, while downward mantle convection is associated wi ...
... 2. What are the relationships among mantle convection, ocean ridges, and subduction zones? Upward mantle convection is thought to be associated with ridges, while downward mantle convection is associated wi ...
Poetry Test Study Guide
... In sea-floor spreading, the sea floor spreads apart along both sides of a mid-ocean ridge as a new crust is added. ...
... In sea-floor spreading, the sea floor spreads apart along both sides of a mid-ocean ridge as a new crust is added. ...
INSIDE THE EARTH
... EQ6: What happens at deep-ocean trenches? Subduction occurs at deep-ocean trenches. This is where the sea floor goes back into the mantle. ...
... EQ6: What happens at deep-ocean trenches? Subduction occurs at deep-ocean trenches. This is where the sea floor goes back into the mantle. ...
The Theory of Plate Tectonics Plates
... • A well tested concept that explains a wide range of observations ...
... • A well tested concept that explains a wide range of observations ...
1.4 Powerpoint
... B. Evidence from Magnetic Stripes – As the rock cools, it becomes magnetized parallel to Earth’s magnetic field at the time. – Earth’s magnetic field has reversed many times. – Scientist discover that the rock making up the ocean floor lies in a pattern. ...
... B. Evidence from Magnetic Stripes – As the rock cools, it becomes magnetized parallel to Earth’s magnetic field at the time. – Earth’s magnetic field has reversed many times. – Scientist discover that the rock making up the ocean floor lies in a pattern. ...
Chap7Sect2 -Cont Drift and Sea-floor
... at the mid-ocean ridge. Molten material erupts and spreads out through the valley that runs along the center of the mid-ocean ridge. It then pushes aside the rock that was already there. ...
... at the mid-ocean ridge. Molten material erupts and spreads out through the valley that runs along the center of the mid-ocean ridge. It then pushes aside the rock that was already there. ...
plate tectonics
... WHAT EVIDENCE PROVED CONTINENTAL DRIFT AND LED TO THE MODERN THEORY OF PLATE TECTONICS?__________________________________________________ _______________________________________________________________ _______________________________________________________________ ...
... WHAT EVIDENCE PROVED CONTINENTAL DRIFT AND LED TO THE MODERN THEORY OF PLATE TECTONICS?__________________________________________________ _______________________________________________________________ _______________________________________________________________ ...
Chapter 17 - Auburn City Schools
... Magnetic reversal: change in Earth’s magnetic field Magnetic symmetry: matching strips on each side of ridge ...
... Magnetic reversal: change in Earth’s magnetic field Magnetic symmetry: matching strips on each side of ridge ...
Notes 11 – Earth`s Interior
... edges of Earth’s crustal plates that extend deep into the lithosphere ...
... edges of Earth’s crustal plates that extend deep into the lithosphere ...
Plate Tectonics
... • Once, the world had one giant supercontinent, called Pangea and one giant ocean. • Then, over time, the supercontinent spread out, forming the 7 continents we know today—this process is described as continental drift ...
... • Once, the world had one giant supercontinent, called Pangea and one giant ocean. • Then, over time, the supercontinent spread out, forming the 7 continents we know today—this process is described as continental drift ...
esga3092 - 4J Blog Server
... the hypothesis of sea-floor spreading. For more information on this Reading Strategy, see the Reading and Study Skills in the Skills and Reference Handbook at the end of your textbook. ...
... the hypothesis of sea-floor spreading. For more information on this Reading Strategy, see the Reading and Study Skills in the Skills and Reference Handbook at the end of your textbook. ...
File
... expanded and consequently higher than the ocean floor further away. As spreading continued, the older ocean floor cooled and subsided to the level of the abyssal plain which is approximately 4 km deep. Hess believed that ocean trenches were the locations where ocean floor was destroyed and recycled. ...
... expanded and consequently higher than the ocean floor further away. As spreading continued, the older ocean floor cooled and subsided to the level of the abyssal plain which is approximately 4 km deep. Hess believed that ocean trenches were the locations where ocean floor was destroyed and recycled. ...
File
... Bathymetry is the measurement of ocean depths and the charting of ocean floor topography (shape and relief). Determining bathymetry involves measuring the vertical distance from the ocean surface down to the mountains, valleys, and plains on the sea floor. 2. Discuss the development of bathymetric t ...
... Bathymetry is the measurement of ocean depths and the charting of ocean floor topography (shape and relief). Determining bathymetry involves measuring the vertical distance from the ocean surface down to the mountains, valleys, and plains on the sea floor. 2. Discuss the development of bathymetric t ...
Marine Ecology, Ecosystems, Marine Factors, Seawater Chemistry
... the length of time its exposed. • This affects organisms living there because some are restricted to zones according to their adaptations to this type of zone (intertidal etc.). ...
... the length of time its exposed. • This affects organisms living there because some are restricted to zones according to their adaptations to this type of zone (intertidal etc.). ...
Abyssal plain
An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth’s surface. They are among the flattest, smoothest and least explored regions on Earth. Abyssal plains are key geologic elements of oceanic basins (the other elements being an elevated mid-ocean ridge and flanking abyssal hills). In addition to these elements, active oceanic basins (those that are associated with a moving plate tectonic boundary) also typically include an oceanic trench and a subduction zone.Abyssal plains were not recognized as distinct physiographic features of the sea floor until the late 1940s and, until very recently, none had been studied on a systematic basis. They are poorly preserved in the sedimentary record, because they tend to be consumed by the subduction process. The creation of the abyssal plain is the end result of spreading of the seafloor (plate tectonics) and melting of the lower oceanic crust. Magma rises from above the asthenosphere (a layer of the upper mantle) and as this basaltic material reaches the surface at mid-ocean ridges it forms new oceanic crust. This is constantly pulled sideways by spreading of the seafloor. Abyssal plains result from the blanketing of an originally uneven surface of oceanic crust by fine-grained sediments, mainly clay and silt. Much of this sediment is deposited by turbidity currents that have been channelled from the continental margins along submarine canyons down into deeper water. The remainder of the sediment is composed chiefly of pelagic sediments. Metallic nodules are common in some areas of the plains, with varying concentrations of metals, including manganese, iron, nickel, cobalt, and copper. These nodules may provide a significant resource for future mining ventures.Owing in part to their vast size, abyssal plains are currently believed to be a major reservoir of biodiversity. The abyss also exerts significant influence upon ocean carbon cycling, dissolution of calcium carbonate, and atmospheric CO2 concentrations over timescales of 100–1000 years. The structure and function of abyssal ecosystems are strongly influenced by the rate of flux of food to the seafloor and the composition of the material that settles. Factors such as climate change, fishing practices, and ocean fertilization are expected to have a substantial effect on patterns of primary production in the euphotic zone. This will undoubtedly impact the flux of organic material to the abyss in a similar manner and thus have a profound effect on the structure, function and diversity of abyssal ecosystems.