2nd_nine_weeks_exam_review_answers
... Mid-Atlantic ridge 18. Give an example of a divergent plate boundary involving two continental plates. Great Rift Valley of Africa 19. Plates that move towards one another are called? convergent plate boundary 20. What is a subduction zone? A more dense oceanic plate is forced under a less dense con ...
... Mid-Atlantic ridge 18. Give an example of a divergent plate boundary involving two continental plates. Great Rift Valley of Africa 19. Plates that move towards one another are called? convergent plate boundary 20. What is a subduction zone? A more dense oceanic plate is forced under a less dense con ...
and at the subduction zones Lesser Antilles Subduction Zone
... Split into two types: Continental and Oceanic ...
... Split into two types: Continental and Oceanic ...
Marine Ecosystems - Distribution Access
... Biomes are “life zones” — large regions of the world that share similar characteristics. Each biome is made of many distinct ecosystems, which are communities of plants and animals and the nonliving environment that surrounds them. Marine ecosystems are part of an aquatic biome containing salt water ...
... Biomes are “life zones” — large regions of the world that share similar characteristics. Each biome is made of many distinct ecosystems, which are communities of plants and animals and the nonliving environment that surrounds them. Marine ecosystems are part of an aquatic biome containing salt water ...
Plate Tectonics
... • Found the maximum age of the ocean floor and its sediments were less than 200 million years • Centers of continents are much older – Parts are more than 3.9 billion years old ...
... • Found the maximum age of the ocean floor and its sediments were less than 200 million years • Centers of continents are much older – Parts are more than 3.9 billion years old ...
Inquiry 15.1 - Using a Simple Model of Plate
... 2) Compare continental and oceanic plates: Continental plates are much thicker but less dense, they contain the Earth’s continents. Oceanic plates are thinner but more dense than continental plates. 3) What happens when two continental plates collide? When two continental plates collide their edges ...
... 2) Compare continental and oceanic plates: Continental plates are much thicker but less dense, they contain the Earth’s continents. Oceanic plates are thinner but more dense than continental plates. 3) What happens when two continental plates collide? When two continental plates collide their edges ...
Slide 1
... The map shows the world’s major surface currents. In the northern hemisphere these currents move clockwise, in the southern hemisphere they move counterclockwise. ...
... The map shows the world’s major surface currents. In the northern hemisphere these currents move clockwise, in the southern hemisphere they move counterclockwise. ...
Ocean and Climate
... Fresh water has maximum density at 4oC (cooling forms ice) At 15oC the water at the ocean surface (S≈36 psu) has ≈26.7 kg/m3 which translates into a lower density =1026.7 kg/m3 compared to a temperature of 0oC. ...
... Fresh water has maximum density at 4oC (cooling forms ice) At 15oC the water at the ocean surface (S≈36 psu) has ≈26.7 kg/m3 which translates into a lower density =1026.7 kg/m3 compared to a temperature of 0oC. ...
deep-ocean trench
... – When the two collide, a deep underwater canyon forms where the ocean crust plunges back into the mantle. – The place where it plunges back into the mantle is called a deep-ocean trench. – This sinking of the older more dense crust is called subduction. ...
... – When the two collide, a deep underwater canyon forms where the ocean crust plunges back into the mantle. – The place where it plunges back into the mantle is called a deep-ocean trench. – This sinking of the older more dense crust is called subduction. ...
Plate Tectonics Continued
... Place two pieces of green paper together; these represent the continents at the time of Pangaea. As we travel through history, the continents move apart and new oceanic crust is formed between the continents. The earth’s magnetic polarity is reversing throughout history as well. Magnetite in the roc ...
... Place two pieces of green paper together; these represent the continents at the time of Pangaea. As we travel through history, the continents move apart and new oceanic crust is formed between the continents. The earth’s magnetic polarity is reversing throughout history as well. Magnetite in the roc ...
2008, final Lecture 12 deep sea and hydro vents
... that precipitate out (form into particles) when the superhot vent water meets the surrounding deep ocean water, which is only a few degrees above freezing. • Black smokers are the hottest of the vents. They spew mostly iron and sulfide, which combine to form iron monosulfide. This compound gives the ...
... that precipitate out (form into particles) when the superhot vent water meets the surrounding deep ocean water, which is only a few degrees above freezing. • Black smokers are the hottest of the vents. They spew mostly iron and sulfide, which combine to form iron monosulfide. This compound gives the ...
Layers of Earth Notes
... interior to become •Dense material moved to the center; less dense to the edges •Materials that hit the Earth caused it to grow •As Earth began to COOL Radioactive elements moved out and heat was released ...
... interior to become •Dense material moved to the center; less dense to the edges •Materials that hit the Earth caused it to grow •As Earth began to COOL Radioactive elements moved out and heat was released ...
Layers of the Earth WebQuest 1. Define the following terms and give
... l. What causes the mantle to float like asphalt? ...
... l. What causes the mantle to float like asphalt? ...
33. The Post-Jurassic Sedimentary Sequence on the Pacific Plate
... tests dissolve during exposure to deep ocean water, their rate of solution being controlled by such physical factors as temperature and pressure and such kinetic factors as supply and removal rates of silica and calcium carbonate. For the calcareous and siliceous remains, this results in an effectiv ...
... tests dissolve during exposure to deep ocean water, their rate of solution being controlled by such physical factors as temperature and pressure and such kinetic factors as supply and removal rates of silica and calcium carbonate. For the calcareous and siliceous remains, this results in an effectiv ...
Plate Tectonics Study Guide for Earth Science Chapter 17
... Give evidence to explain why we believe Antarctica was warmer in the past. Be able to explain 4 supporting evidences for the theory of Continental Drift. Be able to explain seafloor spreading and give supporting evidence for it. Study all notes from Layered Earth B “Tectonic Plates,” Power Point and ...
... Give evidence to explain why we believe Antarctica was warmer in the past. Be able to explain 4 supporting evidences for the theory of Continental Drift. Be able to explain seafloor spreading and give supporting evidence for it. Study all notes from Layered Earth B “Tectonic Plates,” Power Point and ...
PPT
... happens when sea level falls? (negative feed-back – polar ice forming) What happens when deep water warms? (positive feed-back – less CO2 in water) Both effects liberate gas hydrates (CH4), which combines with O2 to form CO2, ultimately reaching the atmosphere ...
... happens when sea level falls? (negative feed-back – polar ice forming) What happens when deep water warms? (positive feed-back – less CO2 in water) Both effects liberate gas hydrates (CH4), which combines with O2 to form CO2, ultimately reaching the atmosphere ...
Crust and Mantle vs. Lithosphere and Asthenosphere
... asthenosphere (a:without; stheno:strength) is the weak and easily deformed layer of the Earth that acts as a “lubricant” for the tectonic plates to slide over. The asthenosphere extends from 100 km depth to 660 km beneath the Earth's surface. Beneath the asthenosphere is the mesosphere, another stro ...
... asthenosphere (a:without; stheno:strength) is the weak and easily deformed layer of the Earth that acts as a “lubricant” for the tectonic plates to slide over. The asthenosphere extends from 100 km depth to 660 km beneath the Earth's surface. Beneath the asthenosphere is the mesosphere, another stro ...
Plate Tectonics Simulation Assignment
... Alfred Wegener based his theory of continental drift on a varied collection of evidence that showed striking similarities between continents separated by vast distances. Wegener's theory began with his and others' observations that the coastlines of continents on opposite sides of the Atlantic appea ...
... Alfred Wegener based his theory of continental drift on a varied collection of evidence that showed striking similarities between continents separated by vast distances. Wegener's theory began with his and others' observations that the coastlines of continents on opposite sides of the Atlantic appea ...
Expedition #8 - SJSU Geology Online Classes
... appeared that the oceanic lithosphere should be older with greater distance from the center of the mid-ocean ridge where it first formed By matching the reversal history to the magnetic patterns under the sea, and assuming seafloor spreading, the age of a particular piece of oceanic lithosphere coul ...
... appeared that the oceanic lithosphere should be older with greater distance from the center of the mid-ocean ridge where it first formed By matching the reversal history to the magnetic patterns under the sea, and assuming seafloor spreading, the age of a particular piece of oceanic lithosphere coul ...
The surface of Earth is constantly being changed. Rocks are
... us from the sun. The lithosphere covers Earth in a thin layer, which is split into sections called plates. The plates float on the molten rock of the mantle. Earth’s plates are slowly moving. Sometimes the plates grind together, and sometimes they move apart. Some of the changes occur slowly, such a ...
... us from the sun. The lithosphere covers Earth in a thin layer, which is split into sections called plates. The plates float on the molten rock of the mantle. Earth’s plates are slowly moving. Sometimes the plates grind together, and sometimes they move apart. Some of the changes occur slowly, such a ...
The Ocean Floor
... The red colors are the youngest parts of the seafloor, where fresh new crust is formed as lava seeps up from the deep interior of the Earth at spreading ridges. The green colors are the spreading ridges, older crust, that moves away from the ridge as new crust is formed. The blue colors are the olde ...
... The red colors are the youngest parts of the seafloor, where fresh new crust is formed as lava seeps up from the deep interior of the Earth at spreading ridges. The green colors are the spreading ridges, older crust, that moves away from the ridge as new crust is formed. The blue colors are the olde ...
Fundamental discoveries about the growth and recycling of continents
... previously proposed based on geologic studies, but was equally widely ignored on the grounds of counter-intuitiveness [Scholl et al., 1980]. By the mid 1980s, trace-element and isotopic studies of ocean-floor sediment and arc eruptive rocks independently confirmed that terrestrial crustal material w ...
... previously proposed based on geologic studies, but was equally widely ignored on the grounds of counter-intuitiveness [Scholl et al., 1980]. By the mid 1980s, trace-element and isotopic studies of ocean-floor sediment and arc eruptive rocks independently confirmed that terrestrial crustal material w ...
The Origin of Ocean Basins
... • Moving across the ocean floor perpendicularly to the oceanic ridges, magnetometers record alternating strong (positive) and weak (negative) magnetic measurements (called magnetic anomalies) in response to the influence of the sea floor rocks. ...
... • Moving across the ocean floor perpendicularly to the oceanic ridges, magnetometers record alternating strong (positive) and weak (negative) magnetic measurements (called magnetic anomalies) in response to the influence of the sea floor rocks. ...
Plate Tectonics - Asheboro High School
... Volcanism at divergent boundaries 15% of volcanoes are found at divergent boundaries Magma is forced upward into the fractures and faults that form as the plate separates Iceland is an example of this volcanism, its part of the midAtlantic ridge ...
... Volcanism at divergent boundaries 15% of volcanoes are found at divergent boundaries Magma is forced upward into the fractures and faults that form as the plate separates Iceland is an example of this volcanism, its part of the midAtlantic ridge ...
Carib x SGI sett.2010
... At the moment, even if the acquired facts can be considered enough for an evolution outline, a lot of different order problems remain open or insufficiently explained, so that the related models seem to be far too speculative. ...
... At the moment, even if the acquired facts can be considered enough for an evolution outline, a lot of different order problems remain open or insufficiently explained, so that the related models seem to be far too speculative. ...
SEDIMENT DISTRIBUTION IN THE OCEANS: THE ATLANTIC
... less than on the 10 “-crossing, the maximum being about 1,000 m, the mean of the order of 500 m. About half of the sediments are layered, the rest is formed by the homogeneous layer that can be followed on the recordings over the whole section as a layer lying roughly conformable over the basement. ...
... less than on the 10 “-crossing, the maximum being about 1,000 m, the mean of the order of 500 m. About half of the sediments are layered, the rest is formed by the homogeneous layer that can be followed on the recordings over the whole section as a layer lying roughly conformable over the basement. ...
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.