Evidence for Plate Tectonics
... which old ocean floor is pushed away from a mid-ocean ridge by the formation of new ocean floor • Trenches: V-shaped valley on the ocean floor where old ocean floor is subducted; a convergent plate boundary ...
... which old ocean floor is pushed away from a mid-ocean ridge by the formation of new ocean floor • Trenches: V-shaped valley on the ocean floor where old ocean floor is subducted; a convergent plate boundary ...
APES-Chapter-16-Geology-PPT-Part
... Minerals and Rocks • Earth’s crust is composed of minerals and rocks • Mineral: element or inorganic compound that occurs naturally and is solid (gold, silver, salt, quartz) • Rock: any material that makes up a large, natural, continuous part of the Earth’s crust; most rocks consists of two or more ...
... Minerals and Rocks • Earth’s crust is composed of minerals and rocks • Mineral: element or inorganic compound that occurs naturally and is solid (gold, silver, salt, quartz) • Rock: any material that makes up a large, natural, continuous part of the Earth’s crust; most rocks consists of two or more ...
Coastal Zones - hrsbstaff.ednet.ns.ca
... • also called the midlittoral or eulittoral zone • is the area that is exposed to the air at low tide and ...
... • also called the midlittoral or eulittoral zone • is the area that is exposed to the air at low tide and ...
exploring the ocean floor - Brighten AcademyMiddle School
... Extends from the base of the continental rise into deep ocean basins. Among Earth’s flattest and smoothest regions an the least explored. Formed by particles of sediment slowly drifting onto the deep ocean floor. Most abyssal plains occur in the Atlantic and Indian oceans. Cover about 40% of the oce ...
... Extends from the base of the continental rise into deep ocean basins. Among Earth’s flattest and smoothest regions an the least explored. Formed by particles of sediment slowly drifting onto the deep ocean floor. Most abyssal plains occur in the Atlantic and Indian oceans. Cover about 40% of the oce ...
Year 4-Tectonic Landscapes Exam Skills 1
... Describe and explain the characteristic features of a constructive boundary. (4) What are the features? Mid-ocean ridges, volcanic islands and earthquakes are the features of a constructive boundary. The question asks for an explanation , i.e. the reasons for these features. You may answer this que ...
... Describe and explain the characteristic features of a constructive boundary. (4) What are the features? Mid-ocean ridges, volcanic islands and earthquakes are the features of a constructive boundary. The question asks for an explanation , i.e. the reasons for these features. You may answer this que ...
File
... activity occurs on the ocean floor *Most volcanoes are found where the plates that make up Earth’s crust meet each other *Volcanoes tend to erupt where one plate is pushed under another plate *The Ring of Fire follows the boundaries of the plates that meet around the Pacific Ocean *An eruption is an ...
... activity occurs on the ocean floor *Most volcanoes are found where the plates that make up Earth’s crust meet each other *Volcanoes tend to erupt where one plate is pushed under another plate *The Ring of Fire follows the boundaries of the plates that meet around the Pacific Ocean *An eruption is an ...
1 - Scioly.org
... 5. Approximately what speed do tectonic plates move per year? a. 4 miles b. 4 feet c. 4 inches d. 4 yards 6. The idea that the landmasses of Earth are not stationary and have moved throughout geologic time was first suggested in the early 1900’s and referred to as __________. (A) sea floor spreading ...
... 5. Approximately what speed do tectonic plates move per year? a. 4 miles b. 4 feet c. 4 inches d. 4 yards 6. The idea that the landmasses of Earth are not stationary and have moved throughout geologic time was first suggested in the early 1900’s and referred to as __________. (A) sea floor spreading ...
Study Guide: Plate Tectonics Test
... 6. The process which occurs during the convergence of two oceanic plates, or an oceanic-continental plate resulting in old oceanic plate (old sea floor) being recycled back down into the mantle is called: a. sea floor spreading b. convection c. subduction d. elimination 7. The result of two oceanic- ...
... 6. The process which occurs during the convergence of two oceanic plates, or an oceanic-continental plate resulting in old oceanic plate (old sea floor) being recycled back down into the mantle is called: a. sea floor spreading b. convection c. subduction d. elimination 7. The result of two oceanic- ...
Click HERE
... Test Review Questions 1. Rocks have alternating patterns of magnetic orientation. This is evidence of… 2. How can we support the theory of plate tectonics and continental drift? 3. List features formed at convergent boundary between ocean and continental crust. 4. What happens to temp., density, pre ...
... Test Review Questions 1. Rocks have alternating patterns of magnetic orientation. This is evidence of… 2. How can we support the theory of plate tectonics and continental drift? 3. List features formed at convergent boundary between ocean and continental crust. 4. What happens to temp., density, pre ...
Theory of Plate Tectonics PowerPoint
... seafloor vary across the ocean floor, and these variations are predictable. The age of oceanic crust consistently increases with distance from a ridge. ...
... seafloor vary across the ocean floor, and these variations are predictable. The age of oceanic crust consistently increases with distance from a ridge. ...
8.4 Earth`s Layers
... Over 82 % of Earth’s volume is contained in the mantle Mantle – a solid, rocky shell that extends to a depth of 2890 km. The boundary between the crust & mantle shows a change in chemical composition. ...
... Over 82 % of Earth’s volume is contained in the mantle Mantle – a solid, rocky shell that extends to a depth of 2890 km. The boundary between the crust & mantle shows a change in chemical composition. ...
Plate Tectonics Review
... 6. Sea-floor spreading takes place where? a. divergent boundaries b. convergent boundaries c. transform boundaries d. all of the above 7. Which of the following is an important reason why Wegener’s continental drift hypothesis was not widely accepted? a. Not all of the continents appear as though th ...
... 6. Sea-floor spreading takes place where? a. divergent boundaries b. convergent boundaries c. transform boundaries d. all of the above 7. Which of the following is an important reason why Wegener’s continental drift hypothesis was not widely accepted? a. Not all of the continents appear as though th ...
Unit 07 Test Review
... 6. What would be the best possible explanation for fossils of land-dwelling organisms found on the east coast of South America and the west coast of Africa? There was a time in Earth’s history, when the Atlantic Ocean did not exist, and the continents of Africa and South America were joined togethe ...
... 6. What would be the best possible explanation for fossils of land-dwelling organisms found on the east coast of South America and the west coast of Africa? There was a time in Earth’s history, when the Atlantic Ocean did not exist, and the continents of Africa and South America were joined togethe ...
Earth`s Structure Earth`s Structure Density Density Stratification
... outer core and solid inner core. Three spheres surround the rocky portion of the Earth. Hydrosphere includes all of the “free” water of the Earth contained in the ocean, lakes, rivers, snow, ice, water vapor and groundwater. Atmosphere is the gaseous envelope that surrounds the Earth and is main ...
... outer core and solid inner core. Three spheres surround the rocky portion of the Earth. Hydrosphere includes all of the “free” water of the Earth contained in the ocean, lakes, rivers, snow, ice, water vapor and groundwater. Atmosphere is the gaseous envelope that surrounds the Earth and is main ...
Chap 3 marine zones
... Hadalpelagic Zone • Hadalpelagic Zone - This layer extends from 6000 meters (19,686 feet) to the bottom of the deepest parts of the ocean. These areas are mostly found in deep water trenches and canyons. The deepest point in the ocean is located in the Mariana Trench off the coast of Japan at 35,7 ...
... Hadalpelagic Zone • Hadalpelagic Zone - This layer extends from 6000 meters (19,686 feet) to the bottom of the deepest parts of the ocean. These areas are mostly found in deep water trenches and canyons. The deepest point in the ocean is located in the Mariana Trench off the coast of Japan at 35,7 ...
Landforms
... The part of the continent located under the water is known as the continental shelf. The width of the continental shelf can vary. In some places the continental shelf is fairly shallow and in other places it becomes very deep, but it is not the ...
... The part of the continent located under the water is known as the continental shelf. The width of the continental shelf can vary. In some places the continental shelf is fairly shallow and in other places it becomes very deep, but it is not the ...
Chapter 3
... Hadalpelagic Zone • Hadalpelagic Zone - This layer extends from 6000 meters (19,686 feet) to the bottom of the deepest parts of the ocean. These areas are mostly found in deep water trenches and canyons. The deepest point in the ocean is located in the Mariana Trench off the coast of Japan at 35,7 ...
... Hadalpelagic Zone • Hadalpelagic Zone - This layer extends from 6000 meters (19,686 feet) to the bottom of the deepest parts of the ocean. These areas are mostly found in deep water trenches and canyons. The deepest point in the ocean is located in the Mariana Trench off the coast of Japan at 35,7 ...
Section 17.3 Theory of Plate Tectonics
... 1. What theory suggests that South America and Africa were once part of a larger continent that broke and moved apart? 2. Who was the German scientist who proposed the most famous version of this theory? 3. List 3 lines of evidence he used to support his theory. ...
... 1. What theory suggests that South America and Africa were once part of a larger continent that broke and moved apart? 2. Who was the German scientist who proposed the most famous version of this theory? 3. List 3 lines of evidence he used to support his theory. ...
Plate Tectonics
... piece of the puzzle… HOW the giant continents could move around the earth. • His idea was not accepted during his lifetime because he did not have a mechanism, a reason, for the movement of the continents. • He spent the rest of his life taking trips to Greenland to test his ideas. In 1930 while ret ...
... piece of the puzzle… HOW the giant continents could move around the earth. • His idea was not accepted during his lifetime because he did not have a mechanism, a reason, for the movement of the continents. • He spent the rest of his life taking trips to Greenland to test his ideas. In 1930 while ret ...
Week 3 (Norton), part a (pdf, 5.3 MB)
... Now we jump ahead to today: this graphic summarizes what we take for granted as major surface expressions of plate tectonic processes: 1. The divergent boundaries of lithosphere plates, as in the mid-oceanic ridge systems; 2. The convergent boundaries of lithospheric continental plates, where one pl ...
... Now we jump ahead to today: this graphic summarizes what we take for granted as major surface expressions of plate tectonic processes: 1. The divergent boundaries of lithosphere plates, as in the mid-oceanic ridge systems; 2. The convergent boundaries of lithospheric continental plates, where one pl ...
Energy from Earth`s interior supports life in global ecosystem
... Microorganisms use the hydrogen as a source of energy to convert carbon dioxide into organic material," explains Dr Lever. "So far, evidence for life deep within oceanic crust was based on chemical and textural signatures in rocks, but direct proof was lacking", adds Dr Olivier Rouxel of the French ...
... Microorganisms use the hydrogen as a source of energy to convert carbon dioxide into organic material," explains Dr Lever. "So far, evidence for life deep within oceanic crust was based on chemical and textural signatures in rocks, but direct proof was lacking", adds Dr Olivier Rouxel of the French ...
Magnetic Field, Sea-floor Spreading, Deep
... reversals recorded on the ocean floor The magnetic poles can change place (called magnetic reversal) Magnetic mineral grains line up in opposite direction of magnetic field ...
... reversals recorded on the ocean floor The magnetic poles can change place (called magnetic reversal) Magnetic mineral grains line up in opposite direction of magnetic field ...
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.