Plate Tectonics – A Geologic Revolution
... • Heat transfer from the core to the surface via convection currents • Incremental heat addition occurs due to decay of radioactive elements • Cooling of the earth will eventually lead to the cessation of plate tectonics and the Earth will become a geologically dead planet ...
... • Heat transfer from the core to the surface via convection currents • Incremental heat addition occurs due to decay of radioactive elements • Cooling of the earth will eventually lead to the cessation of plate tectonics and the Earth will become a geologically dead planet ...
Ocean Landforms - Lisle CUSD 202
... •The mid ocean ridge is a series of mountain ranges on the ocean floor. •They are more than 84,000 kilometers (52,000 miles) in length and they extend through the North and South of the Atlantic ocean, the Indian Ocean, and the South Pacific ocean. •According to the plate tectonics theory, volcanic ...
... •The mid ocean ridge is a series of mountain ranges on the ocean floor. •They are more than 84,000 kilometers (52,000 miles) in length and they extend through the North and South of the Atlantic ocean, the Indian Ocean, and the South Pacific ocean. •According to the plate tectonics theory, volcanic ...
Formation of the Atmosphere
... somehow synthesized into primitive organic molecules from which early life began. This probably occurred in the first half billion years of Earth’s history in an atmosphere with practically no oxygen. The anaerobic bacteria developing at this time could not have survived in an oxygen-rich environmen ...
... somehow synthesized into primitive organic molecules from which early life began. This probably occurred in the first half billion years of Earth’s history in an atmosphere with practically no oxygen. The anaerobic bacteria developing at this time could not have survived in an oxygen-rich environmen ...
Chapter 1 - University Corporation for Atmospheric Research
... Incidentally, the carbon dioxide and donor molecule used for photosynthesis are not the only requirements for plant growth. Plants also need nitrogen, phosphorus, sulfur, potassium, and a dozen or so trace elements, like zinc and iron. As we shall see below, human activities are changing the atmosph ...
... Incidentally, the carbon dioxide and donor molecule used for photosynthesis are not the only requirements for plant growth. Plants also need nitrogen, phosphorus, sulfur, potassium, and a dozen or so trace elements, like zinc and iron. As we shall see below, human activities are changing the atmosph ...
Earth`s Changing Surface
... Theory of Plate Tectonics: Earth’s lithospheric plates are in constant motion on the ______________________ The motion is driven by ___________________ ___________________ in the mantle. Draw diagram here: ...
... Theory of Plate Tectonics: Earth’s lithospheric plates are in constant motion on the ______________________ The motion is driven by ___________________ ___________________ in the mantle. Draw diagram here: ...
Revision summary presentation for C1 Earth Chemistry File
... • Over the past 200 million years the amount of carbon dioxide in the atmosphere has not changed much ...
... • Over the past 200 million years the amount of carbon dioxide in the atmosphere has not changed much ...
Plate Tectonics and Deformation of the Crust
... in Africa and South America provided one of the earliest clues to a former connection between the two continents. Mesosaurus was a freshwater species and so clearly incapable of a transatlantic swim. ...
... in Africa and South America provided one of the earliest clues to a former connection between the two continents. Mesosaurus was a freshwater species and so clearly incapable of a transatlantic swim. ...
What`s Down There?
... Shoreline: boundary where the land and ocean meet. Continental margin: where the underwater edge of a continent meets the ocean. Continental shelf: flat part of the continental margin covered with ocean water. Best fishing; large deposits of oil. ...
... Shoreline: boundary where the land and ocean meet. Continental margin: where the underwater edge of a continent meets the ocean. Continental shelf: flat part of the continental margin covered with ocean water. Best fishing; large deposits of oil. ...
Earth`s Evolution through Geologic Time
... DeepDeep-sea vents offer wide range of temperatures Organic compounds readily dissolve in warm water Protection from ultraviolet radiation Protection from O2 Abundant phosphorous Contain metals Contain clays ...
... DeepDeep-sea vents offer wide range of temperatures Organic compounds readily dissolve in warm water Protection from ultraviolet radiation Protection from O2 Abundant phosphorous Contain metals Contain clays ...
February 2008 - UP Beta Sigma
... Also called the Ocean Conveyor Belt because it acts like one, thermohaline circulation plays a key role in modulating global temperature as oceans absorb, store, and redistribute vast amounts of the sun's heat around the globe. As such, this circulation is mostly responsible for why places at the sa ...
... Also called the Ocean Conveyor Belt because it acts like one, thermohaline circulation plays a key role in modulating global temperature as oceans absorb, store, and redistribute vast amounts of the sun's heat around the globe. As such, this circulation is mostly responsible for why places at the sa ...
Oceanography – EXAM 1 Review Questions
... 73) Warm-water (From 30°C to 350°C) hydrothermal vents form: A) abyssal hills. B) black smokers. C) cold seeps. D) turbidity currents. E) white smokers. 74) The direction of motion along a seafloor transform fault is: A) associated with turbidity currents. B) in the same direction as the plates are ...
... 73) Warm-water (From 30°C to 350°C) hydrothermal vents form: A) abyssal hills. B) black smokers. C) cold seeps. D) turbidity currents. E) white smokers. 74) The direction of motion along a seafloor transform fault is: A) associated with turbidity currents. B) in the same direction as the plates are ...
Ocean resources and oceanography-Unit C Chapter 3
... densities of water caused by temperature. • Why are currents important? • Move nutrients around for fish • Fish and whales use them to increase their migratory patterns ...
... densities of water caused by temperature. • Why are currents important? • Move nutrients around for fish • Fish and whales use them to increase their migratory patterns ...
Subtidal and Deep Sea
... development and increase larval life • Comparison of pure hydrothermal fluids with ambient deep-sea water that are of biological significance include: • up to 400°C, pH = 3.2, high sulfide 350 uM, salinity typically 2 x, oxygen, nitrite, phosphorus not present. • Mg - not in vent water, but used to ...
... development and increase larval life • Comparison of pure hydrothermal fluids with ambient deep-sea water that are of biological significance include: • up to 400°C, pH = 3.2, high sulfide 350 uM, salinity typically 2 x, oxygen, nitrite, phosphorus not present. • Mg - not in vent water, but used to ...
1 Introduction to Marine Ecology jh part 2 2009
... Three-cell circulation model •considers effects of coriolis force due to the Earth’s rotation. •Northern and Southern Hemisphere are each divided into three cells of circulation, each spanning 30 degrees of latitude. •Equator, 30° North and South, and 60° North and South. •Hadley, Ferrel, polar cel ...
... Three-cell circulation model •considers effects of coriolis force due to the Earth’s rotation. •Northern and Southern Hemisphere are each divided into three cells of circulation, each spanning 30 degrees of latitude. •Equator, 30° North and South, and 60° North and South. •Hadley, Ferrel, polar cel ...
Features of the Ocean Floor
... The shelf is generally thought to be an extension of the continent and not really a part of the ocean basin. The average water depth on the shelf is about 75 meters, varying from zero at the shoreline to about 150 meters near its edge. ...
... The shelf is generally thought to be an extension of the continent and not really a part of the ocean basin. The average water depth on the shelf is about 75 meters, varying from zero at the shoreline to about 150 meters near its edge. ...
Biogeochemical Cycles
... • So how do we replace losses caused by farming/logging? • Logging can also alter processes involved in internal cycling… • What about FIRE!!!???!!! – Read Ch. 19 (Ecological Issues: The Yellowstone Fires of 1988) ...
... • So how do we replace losses caused by farming/logging? • Logging can also alter processes involved in internal cycling… • What about FIRE!!!???!!! – Read Ch. 19 (Ecological Issues: The Yellowstone Fires of 1988) ...
Plate tectonics 2 - PAMS
... Magnetic stripes on the ocean floor were further evidence that the sea floor was spreading. The patterns are identical on each side of the ridge Closer examination shows that the magnetic poles have reversed themselves anywhere from 9-2,000 times in the past 3.5 million years… depends on the streng ...
... Magnetic stripes on the ocean floor were further evidence that the sea floor was spreading. The patterns are identical on each side of the ridge Closer examination shows that the magnetic poles have reversed themselves anywhere from 9-2,000 times in the past 3.5 million years… depends on the streng ...
Reply to reviewer ESDD-1-C149-2011 comments on “Assessing
... 4. Please see reply 2. We assume a 10 fold decrease in chemical weathering with the instantaneous extinction of life. We are very grateful for the suggestion of additional contributions and have included them in the manuscript. Following Schwartman & Volk (1989), it is important to note that if the ...
... 4. Please see reply 2. We assume a 10 fold decrease in chemical weathering with the instantaneous extinction of life. We are very grateful for the suggestion of additional contributions and have included them in the manuscript. Following Schwartman & Volk (1989), it is important to note that if the ...
Key - Scioly.org
... The clear indigo blue color of tropical waters is an indication of low biologic productivity. 7. How is heat different from temperature? (1 point) Heat is thermal energy. Temperature is the measurement of average kinetic energy of the particles which compose the matter being tested. 8. What is the u ...
... The clear indigo blue color of tropical waters is an indication of low biologic productivity. 7. How is heat different from temperature? (1 point) Heat is thermal energy. Temperature is the measurement of average kinetic energy of the particles which compose the matter being tested. 8. What is the u ...
Physiography of the Seafloor
... • Continental mountains can be viewed as blocks of wood of different (lower) densities that float higher and sink deeper than oceanic crust • Oceanic crust is of higher density but thinner so it floats/sinks to lesser extent than continental crust ...
... • Continental mountains can be viewed as blocks of wood of different (lower) densities that float higher and sink deeper than oceanic crust • Oceanic crust is of higher density but thinner so it floats/sinks to lesser extent than continental crust ...
Anoxic event
Oceanic anoxic events or anoxic events (Anoxia conditions) refer to intervals in the Earth's past where portions of oceans become depleted in oxygen (O2) at depths over a large geographic area. During some of these events, euxinia develops - euxinia refers to anoxic waters that contain H2S hydrogen sulfide. Although anoxic events have not happened for millions of years, the geological record shows that they happened many times in the past. Anoxic events coincide with several mass extinctions and may contribute to these events. These mass extinctions include some that geobiologists use as time markers in biostratigraphic dating. It is believed oceanic anoxic events are strongly linked to slowing of ocean circulation, climatic warming and elevated levels of greenhouse gases. Enhanced volcanism (through the release of CO2 and other greenhouse gases) is the proposed central external trigger for the development of these events.