Chapter 22.4: Plate Tectonics
... mantle; plates or lithosphere; convection currents; fissure; Midocean ridge; sea-floor spreading; trench; subduction; volcanic activity, ridge push, slab pull, less or more dense, new/old crust, ocean crust, continental crust ...
... mantle; plates or lithosphere; convection currents; fissure; Midocean ridge; sea-floor spreading; trench; subduction; volcanic activity, ridge push, slab pull, less or more dense, new/old crust, ocean crust, continental crust ...
Chapter 17: Plate Tectonics
... Wegener called his hypothesis continental drift, which proposed that Earth’s continents had once been joined as a single landmass. He called this supercontinent Pangaea, a Greek word that means “all the earth.” Wegener proposed that Pangaea began to break apart about 200 million years ago. Since tha ...
... Wegener called his hypothesis continental drift, which proposed that Earth’s continents had once been joined as a single landmass. He called this supercontinent Pangaea, a Greek word that means “all the earth.” Wegener proposed that Pangaea began to break apart about 200 million years ago. Since tha ...
!GLG 101-Illustrated Vocabulary-Chapter 18 !Plate Tectonics
... *a spreading ridge where two crustal plates are moving apart; this underwater ridge goes straight up the middle of the Atlantic Ocean !oceanic crust *the crust of the Earth beneath the oceans; typically only 2 to three miles thick. !oceanic-contintental plate boundary *if this is a convergent bounda ...
... *a spreading ridge where two crustal plates are moving apart; this underwater ridge goes straight up the middle of the Atlantic Ocean !oceanic crust *the crust of the Earth beneath the oceans; typically only 2 to three miles thick. !oceanic-contintental plate boundary *if this is a convergent bounda ...
Plate tectonics, 9-2..
... • Improved stratigraphic information from Gondwanaland, Paleozoic-Mesozoic boundary • Glacial movements in Gondwanaland made more sense if one assumed continents had been in different positions than found today ...
... • Improved stratigraphic information from Gondwanaland, Paleozoic-Mesozoic boundary • Glacial movements in Gondwanaland made more sense if one assumed continents had been in different positions than found today ...
Sea Floor Spreading Test and Answers
... Scientists have discovered parallel magnetic stripes on either side of the midocean ridge. Each pair of stripes has a similar composition, age, and magnetic character. ...
... Scientists have discovered parallel magnetic stripes on either side of the midocean ridge. Each pair of stripes has a similar composition, age, and magnetic character. ...
Development of the oceans as a manifestation of the expansion of
... from the development of the oceanic lithosphere with so-called quiet magnetic field, adjacent to continental margins. This lithosphere differs from that with distinct magnetic stripes by the presence of micro-continents. The latter indicate the process of the origin of the lithosphere different than ...
... from the development of the oceanic lithosphere with so-called quiet magnetic field, adjacent to continental margins. This lithosphere differs from that with distinct magnetic stripes by the presence of micro-continents. The latter indicate the process of the origin of the lithosphere different than ...
Data
... form new oceanic crust and what is referred to as an oceanic ridge. As molten rock continues to rise beneath the ridge, the convective circulation pattern splits and diverges near the surface. The newly formed crust moves horizontally away from the ridge on both sides (sea-floor spreading). As the n ...
... form new oceanic crust and what is referred to as an oceanic ridge. As molten rock continues to rise beneath the ridge, the convective circulation pattern splits and diverges near the surface. The newly formed crust moves horizontally away from the ridge on both sides (sea-floor spreading). As the n ...
The Earth`s Tectonic Plates and Continental Drift
... animals on different continents that could not have crossed the oceans. 2. He noticed that South America and Africa look like they fit together like puzzle pieces. 3. He found rock formations in Africa and South America that matched. ...
... animals on different continents that could not have crossed the oceans. 2. He noticed that South America and Africa look like they fit together like puzzle pieces. 3. He found rock formations in Africa and South America that matched. ...
Plate Tectonics: A Unifying Theory
... Plates of rigid lithosphere (oceanic and continental) move from the energy of heat transfer below Their interactions define divergent, convergent, and transform boundaries and control many surface processes ...
... Plates of rigid lithosphere (oceanic and continental) move from the energy of heat transfer below Their interactions define divergent, convergent, and transform boundaries and control many surface processes ...
Earthquakes and Plate Boundaries
... (4) Some rocks have magnetic fields that point north (normal polarity) while other rocks had magnetic fields that pointed south (reversed polarity). Magnetic Reversals When scientists dated these rocks they realized that all rocks placed these periods of normal and reversed polarity in chronological ...
... (4) Some rocks have magnetic fields that point north (normal polarity) while other rocks had magnetic fields that pointed south (reversed polarity). Magnetic Reversals When scientists dated these rocks they realized that all rocks placed these periods of normal and reversed polarity in chronological ...
Test 2
... The youngest and oldest volcanos of the Hawaiian-Emperor chain are: (57F) The Atlantic Ocean: (50+) Plate movement along a transform boundary causes [caused]: (55) The rate at which crustal plates move is about: (49) The Pacific (west) side of the San Andreas Fault is moving: (55F) Many geologists c ...
... The youngest and oldest volcanos of the Hawaiian-Emperor chain are: (57F) The Atlantic Ocean: (50+) Plate movement along a transform boundary causes [caused]: (55) The rate at which crustal plates move is about: (49) The Pacific (west) side of the San Andreas Fault is moving: (55F) Many geologists c ...
Chapter 4: Plate Tectonics
... 11. How do the lithospheric plates move where convection currents are sinking? ...
... 11. How do the lithospheric plates move where convection currents are sinking? ...
UNIT PLAN 2A: PLATE TECTONICS
... If the thyme settles to the bottom, mix it up again, then wait for it to stop moving before adding the heat source. Have students measure the rate of motion by picking one piece of thyme and start / stop points and time how long it takes to travel this distance divided by the distance itself. ...
... If the thyme settles to the bottom, mix it up again, then wait for it to stop moving before adding the heat source. Have students measure the rate of motion by picking one piece of thyme and start / stop points and time how long it takes to travel this distance divided by the distance itself. ...
plate tectonics test
... When the leading edge of a heavy plate meets the edge of a lighter plate, the heavier plate bends downward. This place where the heavier plate melts (subducts) beneath the lighter one is called the subduction zone. In the ocean, subduction zones can create huge, deep trenches. Ocean trenches can be ...
... When the leading edge of a heavy plate meets the edge of a lighter plate, the heavier plate bends downward. This place where the heavier plate melts (subducts) beneath the lighter one is called the subduction zone. In the ocean, subduction zones can create huge, deep trenches. Ocean trenches can be ...
Activity #8 Worksheet as a pdf
... Describe four lines of evidence used by Wegener and his supporters as evidence of drifting continents ...
... Describe four lines of evidence used by Wegener and his supporters as evidence of drifting continents ...
The emergence of plate tectonics and the Kuhnian
... (Taylor 1910) were not included). The diameter of the nodes is proportional to the value of the GCS. The time scale is not linear (that is, there are gaps in time) ...
... (Taylor 1910) were not included). The diameter of the nodes is proportional to the value of the GCS. The time scale is not linear (that is, there are gaps in time) ...
Name: 1) The primary cause of convection currents in the Earth`s
... measured by radioactive dating and the present location of part of the Hawaiian Island chain. These volcanic islands may have formed as the Pacific Plate moved over a mantle hot spot. ...
... measured by radioactive dating and the present location of part of the Hawaiian Island chain. These volcanic islands may have formed as the Pacific Plate moved over a mantle hot spot. ...
Ch 17 Plate Tectonics
... d. Thickness of sediments __________________with distance from the mid-ocean ridges e. Paleomagnetism: magnetic record of rocks containing __________________ i. Basalt contains iron minerals which get “stuck” pointing towards Earth’s _______________________ as it cools and hardens ii. The iron mine ...
... d. Thickness of sediments __________________with distance from the mid-ocean ridges e. Paleomagnetism: magnetic record of rocks containing __________________ i. Basalt contains iron minerals which get “stuck” pointing towards Earth’s _______________________ as it cools and hardens ii. The iron mine ...
Plate Tectonics - Holy Angels School
... • At the same time, Gondwana also broke into two continents. • One continent contained land that is now the continents of South America and Africa. • The other continent contained land that is now Antarctica, Australia, and India. What discoveries support the idea of continental drift? • For many ye ...
... • At the same time, Gondwana also broke into two continents. • One continent contained land that is now the continents of South America and Africa. • The other continent contained land that is now Antarctica, Australia, and India. What discoveries support the idea of continental drift? • For many ye ...
20081 Study Guide_i-40
... 1. Because the technology for ocean-floor exploration was unavailable during Wegener’s lifetime, he was unable to offer conclusive evidence supporting his hypothesis. Not until the 1960s were scientists able to explore the ocean floor and discover evidence of seafloor spreading and convection curren ...
... 1. Because the technology for ocean-floor exploration was unavailable during Wegener’s lifetime, he was unable to offer conclusive evidence supporting his hypothesis. Not until the 1960s were scientists able to explore the ocean floor and discover evidence of seafloor spreading and convection curren ...
1 Plate Tectonics Review w
... Fit of Continents: Pangaea approximately 200 million years ago Especially good agreement if continental shelf is included. ...
... Fit of Continents: Pangaea approximately 200 million years ago Especially good agreement if continental shelf is included. ...
Plate Tectonics Continental Drift Around 1912, a German scientist
... fits, similar rock contacts and age relations between continents when fitted together, glacial movements indicated by striations, and sources of boulders in ancient tills, and similar geologic sequences including metamorphic rocks in Brazil and Gabon. 5. The idea that the sea floor spread away from ...
... fits, similar rock contacts and age relations between continents when fitted together, glacial movements indicated by striations, and sources of boulders in ancient tills, and similar geologic sequences including metamorphic rocks in Brazil and Gabon. 5. The idea that the sea floor spread away from ...
Volcanoes and Igneous Activity Earth
... acceptance, supporting evidence from all realms of science must be found • A few scientists considered Wegner’s ideas plausible and continued the search ...
... acceptance, supporting evidence from all realms of science must be found • A few scientists considered Wegner’s ideas plausible and continued the search ...
Geomagnetic reversal
A geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was the opposite. These periods are called chrons. The time spans of chrons are randomly distributed with most being between 0.1 and 1 million years with an average of 450,000 years. Most reversals are estimated to take between 1,000 and 10,000 years.The latest one, the Brunhes–Matuyama reversal, occurred 780,000 years ago;and may have happened very quickly, within a human lifetime. A brief complete reversal, known as the Laschamp event, occurred only 41,000 years ago during the last glacial period. That reversal lasted only about 440 years with the actual change of polarity lasting around 250 years. During this change the strength of the magnetic field dropped to 5% of its present strength. Brief disruptions that do not result in reversal are called geomagnetic excursions.