Indirect evidence
... 7. Pressure increases the deeper you go because there is more and more weight on top. If you go down one mile, there is a mile of rock above pushing down. ...
... 7. Pressure increases the deeper you go because there is more and more weight on top. If you go down one mile, there is a mile of rock above pushing down. ...
Ancient rocks yield clues about Earth`s earliest crust
... 29 May 2014, by Bryan Alary One theory is the first continents formed in the ocean as liquid magma rose from the Earth's mantle before cooling and solidifying into a crust. Iceland's crust formed when magma from the mantle rises to shallow levels, incorporating previously formed volcanic rocks. For ...
... 29 May 2014, by Bryan Alary One theory is the first continents formed in the ocean as liquid magma rose from the Earth's mantle before cooling and solidifying into a crust. Iceland's crust formed when magma from the mantle rises to shallow levels, incorporating previously formed volcanic rocks. For ...
GLS100_Lab_DiscPlateBdry-1
... Sea-floor Spread: The process occurring along oceanic divergent boundaries where new oceanic crust is created. When plates pull apart magma generated from the underlying mantle wells up to fill the space, thereby creating new oceanic crust. Subduction: The process along converging boundaries involvi ...
... Sea-floor Spread: The process occurring along oceanic divergent boundaries where new oceanic crust is created. When plates pull apart magma generated from the underlying mantle wells up to fill the space, thereby creating new oceanic crust. Subduction: The process along converging boundaries involvi ...
Convergent and Divergent plate boundaries
... faults, forming a continental rift, like in the Great Rift Valley. The down-dropped blocks may form basins that can trap sediment and water, resulting in lakes. Deep rifting causes solid mantle material in the asthenosphere to flow upward and partially melt. The resulting magma may solidify beneath ...
... faults, forming a continental rift, like in the Great Rift Valley. The down-dropped blocks may form basins that can trap sediment and water, resulting in lakes. Deep rifting causes solid mantle material in the asthenosphere to flow upward and partially melt. The resulting magma may solidify beneath ...
Structure of the Earth
... composition similar to peridotite – Two parts • Mesosphere (lower mantle) • Asthenosphere or upper mantle ...
... composition similar to peridotite – Two parts • Mesosphere (lower mantle) • Asthenosphere or upper mantle ...
Inside the Earth
... • The less familiar layers are the physical layers. • They are based on how the layer looks or acts. ...
... • The less familiar layers are the physical layers. • They are based on how the layer looks or acts. ...
information about earth`s layers
... earth's crust is a little different then the crust on a piece of bread. It is not soft and chewy, but it hard and composed of different minerals. The thin, outermost layer of the earth is called the crust. It makes up only one percent of the earth's mass. The continental crust is thicker than the oc ...
... earth's crust is a little different then the crust on a piece of bread. It is not soft and chewy, but it hard and composed of different minerals. The thin, outermost layer of the earth is called the crust. It makes up only one percent of the earth's mass. The continental crust is thicker than the oc ...
ES - Chapter 4
... What country is a part of the MidAtlantic Ridge, where it rises out of the ocean? ...
... What country is a part of the MidAtlantic Ridge, where it rises out of the ocean? ...
Lesson 1 - Earth`s Interior
... crust, the mantle, and the core. These layers vary greatly in size, composition, temperature and pressure. ...
... crust, the mantle, and the core. These layers vary greatly in size, composition, temperature and pressure. ...
ON THE WESTWARD DRIFT OF THE LITHOSPHERE
... There still are doubts about 1) what is generating the westward drift, and 2) whether it affects the entire lithosphere or it is rather only a mean value, with most of the lithosphere moving "west" due to the dominant effect of the Pacific plate, but part of it still moving in the opposite direction ...
... There still are doubts about 1) what is generating the westward drift, and 2) whether it affects the entire lithosphere or it is rather only a mean value, with most of the lithosphere moving "west" due to the dominant effect of the Pacific plate, but part of it still moving in the opposite direction ...
Plate Tectonics Unit - the E-Portfolio of Jessica Mann B.Com., RED
... Allotted Time Sources used to develop this plan: BC Science 7 Textbook ...
... Allotted Time Sources used to develop this plan: BC Science 7 Textbook ...
Unit 2 Earth Structures 1. The movement of tectonic plates is so slow
... 8. Rainwater can break down rocks by dissolving minerals in the rocks. Acid rain is rainwater that is more acidic than normal rainwater. Acid rain can also dissolve the minerals in rocks faster than normal rainwater can. Which statement about acid rain is true? S.C.7.E.6.2 A. Acid rain causes less ...
... 8. Rainwater can break down rocks by dissolving minerals in the rocks. Acid rain is rainwater that is more acidic than normal rainwater. Acid rain can also dissolve the minerals in rocks faster than normal rainwater can. Which statement about acid rain is true? S.C.7.E.6.2 A. Acid rain causes less ...
Chapter 22.1: Earth`s Structure
... How do we know about Earth’s interior if we can’t see it? - Interpret seismic (earthquake) waves - Waves travel at different speeds in different mediums and materials ...
... How do we know about Earth’s interior if we can’t see it? - Interpret seismic (earthquake) waves - Waves travel at different speeds in different mediums and materials ...
File
... Subsidence of Cooler Rocks ●Rocks that are hot take up more space than cooler rocks. ● The lithosphere is relatively hot at mid-ocean ...
... Subsidence of Cooler Rocks ●Rocks that are hot take up more space than cooler rocks. ● The lithosphere is relatively hot at mid-ocean ...
2017-Earth Forces-Study Guide and Web Quest
... 10. __________________________ occurs when pieces of the earth’s crust are dropped in a new location, helping to build up the earth’s crust. 11. A topographic map shows the shape of the earth’s surface using ______________________ lines. Such lines can never _________________ each other. 12. No matt ...
... 10. __________________________ occurs when pieces of the earth’s crust are dropped in a new location, helping to build up the earth’s crust. 11. A topographic map shows the shape of the earth’s surface using ______________________ lines. Such lines can never _________________ each other. 12. No matt ...
Worksheet
... 19. _________The plate boundary where two plates are moving apart creating new crust and making the oceans spread. 20. _________These are pieces of the crust that "float" and move because of the mantle's convection currents. 21. _________This is the name of the super-continent 250 million years ago. ...
... 19. _________The plate boundary where two plates are moving apart creating new crust and making the oceans spread. 20. _________These are pieces of the crust that "float" and move because of the mantle's convection currents. 21. _________This is the name of the super-continent 250 million years ago. ...
Continental Drift Plate Tectonics
... 8.9A (Supporting) Describe the historical development of evidence that supports the plate tectonic theory. 8.9B (Readiness) Relate plate tectonics to the formation of crustal features. 8.9C (Readiness) Interpret t ...
... 8.9A (Supporting) Describe the historical development of evidence that supports the plate tectonic theory. 8.9B (Readiness) Relate plate tectonics to the formation of crustal features. 8.9C (Readiness) Interpret t ...
mountains ch 14 convergent boundaries
... Forearc and Back-Arc Regions • The forearc region is the area between the trench and the volcanic arc • The back-arc region is located on the side of the volcanic arc opposite the trench ...
... Forearc and Back-Arc Regions • The forearc region is the area between the trench and the volcanic arc • The back-arc region is located on the side of the volcanic arc opposite the trench ...
ANSWER - Test Bank 1
... a. Transform faults show dominantly vertical movement. b. Transform faults are only in the ocean basins. c. Transform faults are areas of spreading and new crustal generation. d. Transform faults change with time from horizontal to vertical motion. e. Transform fault motion typically ends abruptly a ...
... a. Transform faults show dominantly vertical movement. b. Transform faults are only in the ocean basins. c. Transform faults are areas of spreading and new crustal generation. d. Transform faults change with time from horizontal to vertical motion. e. Transform fault motion typically ends abruptly a ...
Water Fluxing - Research at UVU
... 1. Hot mantle rock rises to fill the gap created by the diverging plates. At hot spots, mantle rock rises because it is hotter than surrounding rock, much the way wax rises in a lava lamp. 2. As the hot mantle rock rises, it feels less pressure (it decompresses), yet its temperature doesn't change m ...
... 1. Hot mantle rock rises to fill the gap created by the diverging plates. At hot spots, mantle rock rises because it is hotter than surrounding rock, much the way wax rises in a lava lamp. 2. As the hot mantle rock rises, it feels less pressure (it decompresses), yet its temperature doesn't change m ...
Plate Tectonics Station Notes
... Station 6: Subduction Zones (Use your webquest to answer questions) ...
... Station 6: Subduction Zones (Use your webquest to answer questions) ...
Plate tectonics
Plate tectonics (from the Late Latin tectonicus, from the Greek: τεκτονικός ""pertaining to building"") is a scientific theory that describes the large-scale motion of Earth's lithosphere. This theoretical model builds on the concept of continental drift which was developed during the first few decades of the 20th century. The geoscientific community accepted the theory after the concepts of seafloor spreading were later developed in the late 1950s and early 1960s.The lithosphere, which is the rigid outermost shell of a planet (on Earth, the crust and upper mantle), is broken up into tectonic plates. On Earth, there are seven or eight major plates (depending on how they are defined) and many minor plates. Where plates meet, their relative motion determines the type of boundary; convergent, divergent, or transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along these plate boundaries. The lateral relative movement of the plates typically varies from zero to 100 mm annually.Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. Along convergent boundaries, subduction carries plates into the mantle; the material lost is roughly balanced by the formation of new (oceanic) crust along divergent margins by seafloor spreading. In this way, the total surface of the globe remains the same. This prediction of plate tectonics is also referred to as the conveyor belt principle. Earlier theories (that still have some supporters) propose gradual shrinking (contraction) or gradual expansion of the globe.Tectonic plates are able to move because the Earth's lithosphere has greater strength than the underlying asthenosphere. Lateral density variations in the mantle result in convection. Plate movement is thought to be driven by a combination of the motion of the seafloor away from the spreading ridge (due to variations in topography and density of the crust, which result in differences in gravitational forces) and drag, with downward suction, at the subduction zones. Another explanation lies in the different forces generated by the rotation of the globe and the tidal forces of the Sun and Moon. The relative importance of each of these factors and their relationship to each other is unclear, and still the subject of much debate.