Part 2…Plate Tectonics
... Developing the Theory 1. How much of the earth’s surface is beneath the water? 2. What was the ocean bottom thought to be like in early times/ 3. What technologic advances greatly improved our ability to envision the ocean bottom? 4. What is the mid ocean ridge system? What are its dimensions? 5. Wh ...
... Developing the Theory 1. How much of the earth’s surface is beneath the water? 2. What was the ocean bottom thought to be like in early times/ 3. What technologic advances greatly improved our ability to envision the ocean bottom? 4. What is the mid ocean ridge system? What are its dimensions? 5. Wh ...
File
... move beneath the other oceans creating deep ocean currents. • As it sinks, it carries with it the oxygen added to it in the surface layer from waves and plankton. – This is the only source of oxygen for deep ocean life! ...
... move beneath the other oceans creating deep ocean currents. • As it sinks, it carries with it the oxygen added to it in the surface layer from waves and plankton. – This is the only source of oxygen for deep ocean life! ...
Key to Investigation 2: Plate Tectonics
... primarily the cause of volcanoes. Converging or colliding plates push up mountains. If plates are not locally interacting with each other, there is little geologic activity, such as in Central Australia, the Great Plains (US) and northern Europe. 1c. In most cases, plotted points will be on or very ...
... primarily the cause of volcanoes. Converging or colliding plates push up mountains. If plates are not locally interacting with each other, there is little geologic activity, such as in Central Australia, the Great Plains (US) and northern Europe. 1c. In most cases, plotted points will be on or very ...
Dynamic Earth
... • Wegener and Taylor, early 1900’s, proposed continental drift and Pangaea • Evidence supporting the idea that the continents had drifted. – Geographic fit of continents ...
... • Wegener and Taylor, early 1900’s, proposed continental drift and Pangaea • Evidence supporting the idea that the continents had drifted. – Geographic fit of continents ...
Snack Tectonics Name ______________ Student Learning
... a. Place the two squares of fruit roll up (oceanic plates) onto the frosting right next to each other. b. Press down slowly on the fruit roll ups (because they are dense and will sink a bit into the asthenosphere) as you slowly push them apart about half a cm. c. Notice how the frosting is exposed a ...
... a. Place the two squares of fruit roll up (oceanic plates) onto the frosting right next to each other. b. Press down slowly on the fruit roll ups (because they are dense and will sink a bit into the asthenosphere) as you slowly push them apart about half a cm. c. Notice how the frosting is exposed a ...
Plate Tectonics PPT
... • When two oceanic plates collide, one runs over the other which causes it to sink into the mantle forming a subduction zone. • The subducting plate is bent downward to form a very deep depression in the ocean floor called a trench. • The worlds deepest parts of the ocean are found along trenches. – ...
... • When two oceanic plates collide, one runs over the other which causes it to sink into the mantle forming a subduction zone. • The subducting plate is bent downward to form a very deep depression in the ocean floor called a trench. • The worlds deepest parts of the ocean are found along trenches. – ...
I-6 Dynamic Planet Notes
... 1. According to plate tectonic theory, the outermost layer of the Earth consists of pieces of lithosphere called plates. The plates move relative to one another. Some of the plates have continents on them. The continents move relative to one another. ...
... 1. According to plate tectonic theory, the outermost layer of the Earth consists of pieces of lithosphere called plates. The plates move relative to one another. Some of the plates have continents on them. The continents move relative to one another. ...
Plate Boundaries and Earth`s Land Features
... to move across the top of it, carrying the continents and ocean basins with them as they move about. For example, North America and a good part of the Atlantic Ocean are on the North American Plate. The Theory of Plate Tectonics revolutionized geology because it finally provided an explanation for t ...
... to move across the top of it, carrying the continents and ocean basins with them as they move about. For example, North America and a good part of the Atlantic Ocean are on the North American Plate. The Theory of Plate Tectonics revolutionized geology because it finally provided an explanation for t ...
Seafloor Spreading: Quiz 1
... Mid-ocean ridges (rifts) normally form where tectonic plates are A) moving toward one another (converging) B) moving apart from one another (diverging) C) stationary D) sliding past each other 2) Which observation about the Mid-Atlantic Ridge region provides the best evidence that the seafloor has b ...
... Mid-ocean ridges (rifts) normally form where tectonic plates are A) moving toward one another (converging) B) moving apart from one another (diverging) C) stationary D) sliding past each other 2) Which observation about the Mid-Atlantic Ridge region provides the best evidence that the seafloor has b ...
What is the difference between primary production and primary
... Name two ways different types of copepods feed. Name ways in which bacteria in marine systems acquire energy in marine systems. Through what group of organism does this energy passed through to higher trophic levels. What is the role of viruses in an oceanic food web? In otherwords, be able to draw ...
... Name two ways different types of copepods feed. Name ways in which bacteria in marine systems acquire energy in marine systems. Through what group of organism does this energy passed through to higher trophic levels. What is the role of viruses in an oceanic food web? In otherwords, be able to draw ...
The two major areas of the ocean floor are the and the
... 12. Scientists working in the ________________ hemisphere had trouble catching on to his hypothesis. 13. The biggest problem scientists had with his hypothesis was the ________________ that caused the continents to drift. 14. Wegener’s explanation for how the continents moved was based on __________ ...
... 12. Scientists working in the ________________ hemisphere had trouble catching on to his hypothesis. 13. The biggest problem scientists had with his hypothesis was the ________________ that caused the continents to drift. 14. Wegener’s explanation for how the continents moved was based on __________ ...
Study Guide Geology 303, SDSU Spring PEOPLE for TEST 1: 1
... 17.(2)-radioactivity: The breakdown of unstable atomic nuclei by emission of particles or radiation and energy is released. Source of energy keeping Earth’s interior hot. The early Earth was transformed by this heat along with impact and gravitational energy. 18.(2)-ridge: A volcanic mountain range ...
... 17.(2)-radioactivity: The breakdown of unstable atomic nuclei by emission of particles or radiation and energy is released. Source of energy keeping Earth’s interior hot. The early Earth was transformed by this heat along with impact and gravitational energy. 18.(2)-ridge: A volcanic mountain range ...
Crack structure in oceanic crust: A seismic anisotropy study in the
... tectonic stress that may provide important pathways for the downflow of seawater into the crust. However, near the bottom of the dyke section, a lower ratio of A4θ /A2θ and higher anisotropy amplitude is evidence for the presence of thicker cracks, which may implicate lower rate of mineral precipita ...
... tectonic stress that may provide important pathways for the downflow of seawater into the crust. However, near the bottom of the dyke section, a lower ratio of A4θ /A2θ and higher anisotropy amplitude is evidence for the presence of thicker cracks, which may implicate lower rate of mineral precipita ...
Plate Tectonics - School of Ocean and Earth Science and Technology
... exposure to cold water (black smoker) Bacteria oxidize the sulfides (chemosynthesis) Worms have a symbiotic relationship with the bacteria in their guts ...
... exposure to cold water (black smoker) Bacteria oxidize the sulfides (chemosynthesis) Worms have a symbiotic relationship with the bacteria in their guts ...
Unit 11 vocabulary
... 9) Divergent Boundary: Locations where plates are moving away from one another; occurs above rising convection currents and causes rifts, volcanoes and mid-ocean ridges ...
... 9) Divergent Boundary: Locations where plates are moving away from one another; occurs above rising convection currents and causes rifts, volcanoes and mid-ocean ridges ...
12/2 Sea Floor Spreading HW
... The longest chain of mountains in the world is the system of mid-ocean ridges. In the mid1900s, scientists mapped the mid-ocean ridges using sonar. Sonar is a device that bounces sound waves off underwater objects and then records the echoes of these sound waves. The mid-ocean ridges curve along the ...
... The longest chain of mountains in the world is the system of mid-ocean ridges. In the mid1900s, scientists mapped the mid-ocean ridges using sonar. Sonar is a device that bounces sound waves off underwater objects and then records the echoes of these sound waves. The mid-ocean ridges curve along the ...
Chapter 3 – Review Book Questions
... 37. What is the pattern of magnetism on both sides of the ridges that show many reversals of Earth’s magnetism in the past? _________________________________________________________________ 38. What is happening at the mid-ocean ridge that is causing diverging (spreading apart)? ___________ ________ ...
... 37. What is the pattern of magnetism on both sides of the ridges that show many reversals of Earth’s magnetism in the past? _________________________________________________________________ 38. What is happening at the mid-ocean ridge that is causing diverging (spreading apart)? ___________ ________ ...
Plate Tectonics Tutoiral Questions
... Base your answer on the passage and map below and on your knowledge of Earth science. The passage provides some information about the sediments under Portland, Oregon, and the map shows where Portland is located. Bad seismic combination under Portland: Earthquake faults and jiggly sediment Using a t ...
... Base your answer on the passage and map below and on your knowledge of Earth science. The passage provides some information about the sediments under Portland, Oregon, and the map shows where Portland is located. Bad seismic combination under Portland: Earthquake faults and jiggly sediment Using a t ...
epicontinental seas
... Factors that influence isostasy are crust thickness, crust density, erosion rates, and glaciation rates. ...
... Factors that influence isostasy are crust thickness, crust density, erosion rates, and glaciation rates. ...
Summary of lesson - TI Education
... Scientists estimate that Earth is over 4 billion years old. However, the oldest region of the sea floor is only 200 million years old. How can we explain this? The answer is related to what is happening under the sea at the trenches and ridges in the earth’s crust. In this simulation, you will analy ...
... Scientists estimate that Earth is over 4 billion years old. However, the oldest region of the sea floor is only 200 million years old. How can we explain this? The answer is related to what is happening under the sea at the trenches and ridges in the earth’s crust. In this simulation, you will analy ...
Summary of lesson - TI Education
... Scientists estimate that Earth is over 4 billion years old. However, the oldest region of the sea floor is only 200 million years old. How can we explain this? The answer is related to what is happening under the sea at the trenches and ridges in the earth’s crust. In this simulation, you will analy ...
... Scientists estimate that Earth is over 4 billion years old. However, the oldest region of the sea floor is only 200 million years old. How can we explain this? The answer is related to what is happening under the sea at the trenches and ridges in the earth’s crust. In this simulation, you will analy ...
Theory of Continental Drift
... In 1947, scientists went to map the Mid-Atlantic ridge. While studying the ridge, the scientists collected and studied rock samples. They found ...
... In 1947, scientists went to map the Mid-Atlantic ridge. While studying the ridge, the scientists collected and studied rock samples. They found ...
Continental Drift, sea floor spreading and plate tectonics PDF
... In 1947, scientists went to map the Mid-Atlantic ridge. While studying the ridge, the scientists collected and studied rock samples. They found ...
... In 1947, scientists went to map the Mid-Atlantic ridge. While studying the ridge, the scientists collected and studied rock samples. They found ...
Ocean - abyss of time planet earth
... precipitation of metal sulphides, a reaction that has generated some of the largest metal ore bodies on Earth. Hot, sulphide and metal-laden fluids do not sound like the ideal place for life to thrive, but it is precisely around these vents that the highest concentrations of biomass in the deep sea ...
... precipitation of metal sulphides, a reaction that has generated some of the largest metal ore bodies on Earth. Hot, sulphide and metal-laden fluids do not sound like the ideal place for life to thrive, but it is precisely around these vents that the highest concentrations of biomass in the deep sea ...
Understanding the Cascadia Subduction Zone
... One way tectonic plates move is for an oceanic plate to sink underneath a continental plate as the two plates converge, called a subduction zone. Subduction zones create the largest earthquakes observed on the earth, such as the frequent earthquakes in Japan and Chile, so understanding these bounda ...
... One way tectonic plates move is for an oceanic plate to sink underneath a continental plate as the two plates converge, called a subduction zone. Subduction zones create the largest earthquakes observed on the earth, such as the frequent earthquakes in Japan and Chile, so understanding these bounda ...
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.