Plate Tectonics: Ch. 22.4 Self Quiz
... 1. Which choice DOES NOT represent evidence that Alfred Wegner used to support his theory of Continental Drift? a. Fossil records from continents separated by oceans b. Similar geological formations, like mountain chains, on different continents. c. Observations of sea floor spreading at the MidOce ...
... 1. Which choice DOES NOT represent evidence that Alfred Wegner used to support his theory of Continental Drift? a. Fossil records from continents separated by oceans b. Similar geological formations, like mountain chains, on different continents. c. Observations of sea floor spreading at the MidOce ...
Ch. 9 Review - 8th Grade Science
... • 28. The arrow at A represents: D – Molten magma rising from the mantle • 29. What is occuring at the feature labeled B? F – New rock is being added to the oceanic plate • 30. As sea-floor spreading occurs, the oceanic plate: C – Moves from B to C • 31. What is occuring at D? G – The oceanic plate ...
... • 28. The arrow at A represents: D – Molten magma rising from the mantle • 29. What is occuring at the feature labeled B? F – New rock is being added to the oceanic plate • 30. As sea-floor spreading occurs, the oceanic plate: C – Moves from B to C • 31. What is occuring at D? G – The oceanic plate ...
Do deep mantle plumes exist?
... progressions occur in differing directions (Christiansen 2003) and in the Snake River Plain of Nevada where a silicic time-progressive chain is directionally fixed relative to the Hawaiian chain whilst basaltic magmatism is continuous. Furthermore, Icelandic magmatism is not fixed relative to the Ha ...
... progressions occur in differing directions (Christiansen 2003) and in the Snake River Plain of Nevada where a silicic time-progressive chain is directionally fixed relative to the Hawaiian chain whilst basaltic magmatism is continuous. Furthermore, Icelandic magmatism is not fixed relative to the Ha ...
Plate Movement ppt
... • Mid-Ocean Ridges are found winding around the Earth in all oceans. • They look like mountain ranges. • Most stay under the surface of the water. • Iceland is one area of the mountain range that rises above the surface of the North Atlantic Ocean • What happens when plates move apart??? Magma/lava ...
... • Mid-Ocean Ridges are found winding around the Earth in all oceans. • They look like mountain ranges. • Most stay under the surface of the water. • Iceland is one area of the mountain range that rises above the surface of the North Atlantic Ocean • What happens when plates move apart??? Magma/lava ...
File
... 2. Convergent (boundaries of destruction) Three types of destructive boundaries: 1. Oceanic-oceanic: where two ocean plates collide 2. Oceanic-continental: where an ocean and continental plate ...
... 2. Convergent (boundaries of destruction) Three types of destructive boundaries: 1. Oceanic-oceanic: where two ocean plates collide 2. Oceanic-continental: where an ocean and continental plate ...
Chapter 17 Study Guide 16
... 12) What is the asthenosphere? _____________________________________________________________ ____________________________________________________________________________________ 13) What takes place in the asthenosphere to cause the plates to move? ___________________________________________________ ...
... 12) What is the asthenosphere? _____________________________________________________________ ____________________________________________________________________________________ 13) What takes place in the asthenosphere to cause the plates to move? ___________________________________________________ ...
The Earth Label the diagram Choose the correct answer
... Vision of the school :To be the best choice for any parent who seeks to achieve the best educational service for his/ her children ...
... Vision of the school :To be the best choice for any parent who seeks to achieve the best educational service for his/ her children ...
Plate Tectonics Vocab List
... 1. The giant supercontinent that once existed 2. It states that the Earth’s crust is broken up into plates ...
... 1. The giant supercontinent that once existed 2. It states that the Earth’s crust is broken up into plates ...
Chapter 5 Earths Interior
... Less than 1% of Earth’s mass Minerals similar to granite, Less dense Average thickness 30 km ...
... Less than 1% of Earth’s mass Minerals similar to granite, Less dense Average thickness 30 km ...
File
... Earth and is broken into several pieces called plates asthenosphere: solid, plastic layer of the mantle beneath the lithosphere made of mantle rock that flows very slowly which allows plates to move on top of it ...
... Earth and is broken into several pieces called plates asthenosphere: solid, plastic layer of the mantle beneath the lithosphere made of mantle rock that flows very slowly which allows plates to move on top of it ...
Key Concept Review (Answers to in-text “Concept Checks”) Chapter
... demanded explanation, and researchers redoubled their efforts to discover the links after the conclusion of the Second World War. 17. Radiometric dating allowed rock sequences to be dated and their relative positions through time determined. Radiometric studies also solidified understanding of Eart ...
... demanded explanation, and researchers redoubled their efforts to discover the links after the conclusion of the Second World War. 17. Radiometric dating allowed rock sequences to be dated and their relative positions through time determined. Radiometric studies also solidified understanding of Eart ...
Plate Tectonics - maxwellsciencenfhs
... • No acceptable mechanism - Where did the energy come from? • Proposes that continents move through oceanic crust – but geological features do not support this (the oceanic crust would deform). • Doesn’t account for the erosion of coastlines that must have occurred over 250,000 years. ...
... • No acceptable mechanism - Where did the energy come from? • Proposes that continents move through oceanic crust – but geological features do not support this (the oceanic crust would deform). • Doesn’t account for the erosion of coastlines that must have occurred over 250,000 years. ...
journey 05 - Auburn High School
... The study of seismic waves allows scientists to “see” inside the earth. Scientists have discovered that seismic waves • refract • reflect • change velocity • and become absorbed by various parts of the Earth’s interior ...
... The study of seismic waves allows scientists to “see” inside the earth. Scientists have discovered that seismic waves • refract • reflect • change velocity • and become absorbed by various parts of the Earth’s interior ...
Unit 7 Plate Tectonics: Key Concept Notes
... Wegener’s ideas were not accepted because he couldn’t show how continents could move thousands of miles to their current locations. Today, it is known that the crust is broken into 15 major tectonic plates that all move due to convection currents in the Earths’ mantle. Three types of tectonic plate ...
... Wegener’s ideas were not accepted because he couldn’t show how continents could move thousands of miles to their current locations. Today, it is known that the crust is broken into 15 major tectonic plates that all move due to convection currents in the Earths’ mantle. Three types of tectonic plate ...
Plate Tectonics - Crafton Hills College
... 6) Polar Wandering: ancient poles were in different positions than the present poles. This can only be explained by: 1) Continents remained still and the poles moved 2) Poles were still and the continents moved (Reality: they both move) Wagener’s theory was not accepted. Why? ...
... 6) Polar Wandering: ancient poles were in different positions than the present poles. This can only be explained by: 1) Continents remained still and the poles moved 2) Poles were still and the continents moved (Reality: they both move) Wagener’s theory was not accepted. Why? ...
Mantle plume
A mantle plume is a mechanism proposed in 1971 to explain volcanic regions of the earth that were not thought to be explicable by the then-new theory of plate tectonics. Some such volcanic regions lie far from tectonic plate boundaries, for example, Hawaii. Others represent unusually large-volume volcanism, whether on plate boundaries, e.g. Iceland, or basalt floods such as the Deccan or Siberian traps.A mantle plume is posited to exist where hot rock nucleates at the core-mantle boundary and rises through the Earth's mantle becoming a diapir in the Earth's crust. The currently active volcanic centers are known as ""hot spots"". In particular, the concept that mantle plumes are fixed relative to one another, and anchored at the core-mantle boundary, was thought to provide a natural explanation for the time-progressive chains of older volcanoes seen extending out from some such hot spots, such as the Hawaiian–Emperor seamount chain.The hypothesis of mantle plumes from depth is not universally accepted as explaining all such volcanism. It has required progressive hypothesis-elaboration leading to variant propositions such as mini-plumes and pulsing plumes. Another hypothesis for unusual volcanic regions is the ""Plate model"". This proposes shallower, passive leakage of magma from the mantle onto the Earth's surface where extension of the lithosphere permits it, attributing most volcanism to plate tectonic processes, with volcanoes far from plate boundaries resulting from intraplate extension.