plate tectonics - Math/Science Nucleus
... on the behavior of seismic waves and laboratory experiments. These divisions are based on the composition of each layer. The outermost layer is the crust. The Earth has two types of crust. Continental crust underlies much of the Earth’s land surface and is what we live on. The ocean floors are under ...
... on the behavior of seismic waves and laboratory experiments. These divisions are based on the composition of each layer. The outermost layer is the crust. The Earth has two types of crust. Continental crust underlies much of the Earth’s land surface and is what we live on. The ocean floors are under ...
Week 7 Quiz: Plate Tectonics Name
... ____4. Why is Earth not growing in spite of sea floor spreading? A. because of subduction in the Atlantic Ocean. C. because of subduction the Pacific Ocean. B. because of subduction in the Indian Ocean. D. because of subduction in the Gulf of Mexico. ____5. The ________ in the asthenosphere is descr ...
... ____4. Why is Earth not growing in spite of sea floor spreading? A. because of subduction in the Atlantic Ocean. C. because of subduction the Pacific Ocean. B. because of subduction in the Indian Ocean. D. because of subduction in the Gulf of Mexico. ____5. The ________ in the asthenosphere is descr ...
Tectonic Movement – Plates and Faults
... up as time progresses and may conclude in the release of this energy. The crust is divided into layers of materials that have been compressed together. These layers are known as strata, laid down and composed of the denudated material of pre-existing rocks. Folding and faulting are the result of tec ...
... up as time progresses and may conclude in the release of this energy. The crust is divided into layers of materials that have been compressed together. These layers are known as strata, laid down and composed of the denudated material of pre-existing rocks. Folding and faulting are the result of tec ...
Chapter 1: Introduction
... subduction of the Pacific oceanic plate occurs below the underthrusted Yacutat terrane at South-Alaska (Brocher et al., 1994). This terrane may have accreted to the subducting plate to result in a thickened crust, and the associated increased compositional buoyancy might postpone steep subduction. A ...
... subduction of the Pacific oceanic plate occurs below the underthrusted Yacutat terrane at South-Alaska (Brocher et al., 1994). This terrane may have accreted to the subducting plate to result in a thickened crust, and the associated increased compositional buoyancy might postpone steep subduction. A ...
How and Where Volcanoes Form
... Definition of Volcano • A. Volcano: Both an opening in Earth’s crust through which molten rock, gases and ash erupt and the landform that develops around this ...
... Definition of Volcano • A. Volcano: Both an opening in Earth’s crust through which molten rock, gases and ash erupt and the landform that develops around this ...
video slide
... properties of life • Protobionts are collections of abiotically produced molecules, surrounded by a membrane or membrane-like structure • They would show simple reproduction and metabolism, and maintain an internal chemical environment (beginnings of homeostasis) ...
... properties of life • Protobionts are collections of abiotically produced molecules, surrounded by a membrane or membrane-like structure • They would show simple reproduction and metabolism, and maintain an internal chemical environment (beginnings of homeostasis) ...
FIRST MOTION STUDIES OF EARTHQUAKES
... Divergent boundaries (“rift valley” on continent “spreading center” or “mid-ocean ridge” in ocean lithosphere) ...
... Divergent boundaries (“rift valley” on continent “spreading center” or “mid-ocean ridge” in ocean lithosphere) ...
Mountain Building Mountain Building
... • Several hypotheses have been proposed for the formations of Earth’s mountain belts • None explain all observations as well as plate tectonics • Most – but not all – mountain building occurs at convergent plate boundaries ...
... • Several hypotheses have been proposed for the formations of Earth’s mountain belts • None explain all observations as well as plate tectonics • Most – but not all – mountain building occurs at convergent plate boundaries ...
Ophiolites as Archives of Recycled Crustal Material Residing in the
... phases, presumably derived from zones with extremely low fO2, as required for the formation of moissanite and other native elements. Stage 3 – Continued ascent above the transition of peridotites containing chromite and ultrahigh-pressure minerals transports them to shallow mantle depths, where they ...
... phases, presumably derived from zones with extremely low fO2, as required for the formation of moissanite and other native elements. Stage 3 – Continued ascent above the transition of peridotites containing chromite and ultrahigh-pressure minerals transports them to shallow mantle depths, where they ...
QUESTION 1 What are the 4 layers of Earth called? Describe each
... radioactive decay and leftover from Earth’s formation) warms magma in the mantle. This magma becomes less dense, and rises. Cooler magma sinks to take its place, creating convection currents. Plates on top of the rising magma zones are pushed apart: ...
... radioactive decay and leftover from Earth’s formation) warms magma in the mantle. This magma becomes less dense, and rises. Cooler magma sinks to take its place, creating convection currents. Plates on top of the rising magma zones are pushed apart: ...
Multiple Choice Questions
... a. mostly lava b. lava and pyroclasts, roughly equal amounts c. mostly pyroclastic d. just gas, only gas, nothing but gas, nada 14 Cleavage in this mineral would be (see diagram to the right): a. two-directions at right angles b. two-directions not at right angles c. basal (one –direction, perfect) ...
... a. mostly lava b. lava and pyroclasts, roughly equal amounts c. mostly pyroclastic d. just gas, only gas, nothing but gas, nada 14 Cleavage in this mineral would be (see diagram to the right): a. two-directions at right angles b. two-directions not at right angles c. basal (one –direction, perfect) ...
PreparationForMidTerm
... global extinction events (the disappearance of many species worldwide) biozones (practice questions were handed out) correlation using planktonic species (more widespread than benthic species) transgression/regression: rise/drop in sealevel which can influence the sequence of rock types and therefor ...
... global extinction events (the disappearance of many species worldwide) biozones (practice questions were handed out) correlation using planktonic species (more widespread than benthic species) transgression/regression: rise/drop in sealevel which can influence the sequence of rock types and therefor ...
Part 1: The Layers of Earth
... Heat transfer is the movement of heat from a warmer object to a cooler object. There are three ways in which heat can be transferred; conduction, convection and/or radiation. Click on the following two links and answer the questions below. ...
... Heat transfer is the movement of heat from a warmer object to a cooler object. There are three ways in which heat can be transferred; conduction, convection and/or radiation. Click on the following two links and answer the questions below. ...
Discovering Plate Boundaries
... Goal: Students will be able to explain and justify conclusions based on data, maps, and diagrams about the formation and boundaries of geologic features due to tectonic plate movement. Background: The Earth’s outermost layer is fragmented into plates that are moving relative to one another as they s ...
... Goal: Students will be able to explain and justify conclusions based on data, maps, and diagrams about the formation and boundaries of geologic features due to tectonic plate movement. Background: The Earth’s outermost layer is fragmented into plates that are moving relative to one another as they s ...
Plate Boundaries and Plate Interactions
... crust. Sometimes these make ocean trenches. • Nazca plate & South American Plate ...
... crust. Sometimes these make ocean trenches. • Nazca plate & South American Plate ...
Restless Earth
... Q: Which volcano is found on a destructive plate margin, give an example with the names of the plates. A: Composite volcano: Mount St Helens – Juan de Fuca Plate and the North American Plate. Q: Describe the key features of a shield volcano? A: Sloping sides caused by low viscosity ...
... Q: Which volcano is found on a destructive plate margin, give an example with the names of the plates. A: Composite volcano: Mount St Helens – Juan de Fuca Plate and the North American Plate. Q: Describe the key features of a shield volcano? A: Sloping sides caused by low viscosity ...
LANDFORMS
... When plates break apart, moving away from each other, they create tensional force. Tensional forces are forces that pull crustal rocks apart. ...
... When plates break apart, moving away from each other, they create tensional force. Tensional forces are forces that pull crustal rocks apart. ...
Reference Frames
... used by most science textbooks is the boundary reference frame. With this reference frame, the relative motion of plates is observed from the plate boundary. ...
... used by most science textbooks is the boundary reference frame. With this reference frame, the relative motion of plates is observed from the plate boundary. ...
The-Changing-Earth-5th-Edition-Monroe-Solution
... 3. Demonstrate the relationship between hot spots and surface volcanic chains with a piece of paper and a lighted match. As you move the paper over the match a burn trace is left with the oldest burn at the farthest distance from the match. Be careful! 4. Use this idea to explain mid ocean ridge spr ...
... 3. Demonstrate the relationship between hot spots and surface volcanic chains with a piece of paper and a lighted match. As you move the paper over the match a burn trace is left with the oldest burn at the farthest distance from the match. Be careful! 4. Use this idea to explain mid ocean ridge spr ...
Managing Hazards
... Convection currents in the mantle move two plates apart. The gap in between is filled by magma. This erupts onto the surface and cools as new land. ...
... Convection currents in the mantle move two plates apart. The gap in between is filled by magma. This erupts onto the surface and cools as new land. ...
Name Aims 27 - 35 Review Questions Version 1 Page 1
... Base your answers to questions 58 through 60 on the passage below. Crustal Activity at Mid-Ocean Ridges Mid-ocean ridges are found at one type of tectonic plate boundary. These ridges consist of extensive underwater mountain ranges split by rift valleys. The rift valleys mark places where two crust ...
... Base your answers to questions 58 through 60 on the passage below. Crustal Activity at Mid-Ocean Ridges Mid-ocean ridges are found at one type of tectonic plate boundary. These ridges consist of extensive underwater mountain ranges split by rift valleys. The rift valleys mark places where two crust ...
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.