Earthquakes WebQuest - Warren County Schools
... landmasses gradually shifted and broke apart to form the continents as we know them today. How many original "supercontinents" did Wegener's theory of continental drift assume? 2. The Earth's crust is made up of a series twelve interconnected landmasses are called tectonic plates. What are the major ...
... landmasses gradually shifted and broke apart to form the continents as we know them today. How many original "supercontinents" did Wegener's theory of continental drift assume? 2. The Earth's crust is made up of a series twelve interconnected landmasses are called tectonic plates. What are the major ...
Plate Tectonics
... Almost identical patterns of rock layers on different continents is evidence that the rocks were once close together or joined. Why are the continents moving? 12 of 31 ...
... Almost identical patterns of rock layers on different continents is evidence that the rocks were once close together or joined. Why are the continents moving? 12 of 31 ...
Plate Tectonics 1
... • Why do we have oceanic and continental crusts? • Why are there deep-sea trenches, mid-ocean ridges and long seamount chains? Break ...
... • Why do we have oceanic and continental crusts? • Why are there deep-sea trenches, mid-ocean ridges and long seamount chains? Break ...
CHAPTER 18 Volcanism
... massive ranges that extends 2,500 kilometers across South Asia north of India. The Himalayas cover all or part of the countries of Tibet, Nepal, and Bhutan. A climber on the high slopes of Mt. Everest would probably be surprised to learn that the region was relatively flat about 40 million years ago ...
... massive ranges that extends 2,500 kilometers across South Asia north of India. The Himalayas cover all or part of the countries of Tibet, Nepal, and Bhutan. A climber on the high slopes of Mt. Everest would probably be surprised to learn that the region was relatively flat about 40 million years ago ...
Historical Geology - FacultyWeb Support Center
... Oceanography – the study of the chemical and physical aspects of the earth’s oceans Glaciology – the study of the cause and occurrence of glacial episodes Weathering & Erosion –the disintegration or physical and chemical breakdown and subsequent transportation of earth materials Geomorphology – the ...
... Oceanography – the study of the chemical and physical aspects of the earth’s oceans Glaciology – the study of the cause and occurrence of glacial episodes Weathering & Erosion –the disintegration or physical and chemical breakdown and subsequent transportation of earth materials Geomorphology – the ...
File - Mr. Medler, Science
... Density is the amount of anything in a certain space; the quantity of a matter in a given area. Hot liquids are less dense than cold liquids. Currents are a flow of water, air, or any liquid (or gas). Convection currents are circular currents or movement within a liquid (or gas) due to different den ...
... Density is the amount of anything in a certain space; the quantity of a matter in a given area. Hot liquids are less dense than cold liquids. Currents are a flow of water, air, or any liquid (or gas). Convection currents are circular currents or movement within a liquid (or gas) due to different den ...
Terms/Concepts/People/Case Hist
... 1. (9)-climate: The average weather conditions at a place over many years. Based mainly on temperature and precipitation data collected over decades. 2. (9)-Coriolis effect: Moving objects experience the Earth move out from beneath them; in the Northern Hemisphere, bodies move toward their right-han ...
... 1. (9)-climate: The average weather conditions at a place over many years. Based mainly on temperature and precipitation data collected over decades. 2. (9)-Coriolis effect: Moving objects experience the Earth move out from beneath them; in the Northern Hemisphere, bodies move toward their right-han ...
Plate Tectonics
... What term describes a region on the earth's surface that receives neither P nor S waves from a particular earthquake? ...
... What term describes a region on the earth's surface that receives neither P nor S waves from a particular earthquake? ...
C1b 6.1 Structure of the Earth
... The core extends to about half the radius of the Earth. It is made mostly from iron and nickel and is where the Earth’s magnetic field comes from. It is very dense. ...
... The core extends to about half the radius of the Earth. It is made mostly from iron and nickel and is where the Earth’s magnetic field comes from. It is very dense. ...
bokelmannAbstract_5p..
... Are the tectonic plates pulled and/or pushed from the side as the Orowan−Elsasser model (Elsasser, 1969) suggests or does mantle convection play an active role in driving the plates (Holmes, 1933)? Both concepts, driving from the side by "slab pull" from the subducting plates (slabs) and "ridge push ...
... Are the tectonic plates pulled and/or pushed from the side as the Orowan−Elsasser model (Elsasser, 1969) suggests or does mantle convection play an active role in driving the plates (Holmes, 1933)? Both concepts, driving from the side by "slab pull" from the subducting plates (slabs) and "ridge push ...
NAME - Thomas C. Cario Middle School
... 11.) How many seismograph stations are needed to locate an epicenter? 3 12.) What information is needed in order to use a graph to find out how far away an earthquake is from a seismograph station? The difference in arrival times between the p and s waves. 13.) Which seismic waves are the slowest an ...
... 11.) How many seismograph stations are needed to locate an epicenter? 3 12.) What information is needed in order to use a graph to find out how far away an earthquake is from a seismograph station? The difference in arrival times between the p and s waves. 13.) Which seismic waves are the slowest an ...
CRUSTAL EVOLUTION OF EARTH AND MARS E. Gazel1, H. Y.
... Archean tonalite, trondhjemite and granodiorite (TTG, the building blocks of continental crust on Earth) suites and modern magmas with slab melt signatures in some subduction zones [7]. The stagnant-lid model proposes that during the early part of Earth’s evolution the crust behaved as a rigid, slow ...
... Archean tonalite, trondhjemite and granodiorite (TTG, the building blocks of continental crust on Earth) suites and modern magmas with slab melt signatures in some subduction zones [7]. The stagnant-lid model proposes that during the early part of Earth’s evolution the crust behaved as a rigid, slow ...
Most earthquakes are the result of huge pieces of rock in the earth
... The crust of the earth, along with the rigid uppermost part of the mantle, is called the lithosphere. The lithosphere is 18-120 kilometers thick. It covers the earth’s interior and is broken into pieces called plates. The rocks that make up these plates grind, collide, move past one another, and sep ...
... The crust of the earth, along with the rigid uppermost part of the mantle, is called the lithosphere. The lithosphere is 18-120 kilometers thick. It covers the earth’s interior and is broken into pieces called plates. The rocks that make up these plates grind, collide, move past one another, and sep ...
Sliding Plates
... Earth’s crust and the top of Earth’s mantle form a solid layer called the lithosphere. Below this layer, lies the asthenosphere, which is soft and jelly-like. The convection currents within this layer cause the lithosphere to break into plates and slide along the surface of the asthenosphere. Plate ...
... Earth’s crust and the top of Earth’s mantle form a solid layer called the lithosphere. Below this layer, lies the asthenosphere, which is soft and jelly-like. The convection currents within this layer cause the lithosphere to break into plates and slide along the surface of the asthenosphere. Plate ...
Tectonic Plates
... The three major types of rocks found in the earth’s crust—sedimentary, igneous, and metamorphic—are recycled very slowly by the process of erosion, melting, and metamorphism. ...
... The three major types of rocks found in the earth’s crust—sedimentary, igneous, and metamorphic—are recycled very slowly by the process of erosion, melting, and metamorphism. ...
The Initial Break Up
... Building a Theory of Plate Tectonics • The Theory of Plate Tectonics says that the Lithosphere is cracked and broken into pieces called plates that move on top of the convecting Asthenosphere. ...
... Building a Theory of Plate Tectonics • The Theory of Plate Tectonics says that the Lithosphere is cracked and broken into pieces called plates that move on top of the convecting Asthenosphere. ...
chapter_4_the_earths_interior - Unama`ki Training & Education
... mantle is quite different than the rock of the crust. The crust and uppermost mantle together form the lithosphere which is relatively strong and brittle. ...
... mantle is quite different than the rock of the crust. The crust and uppermost mantle together form the lithosphere which is relatively strong and brittle. ...
Plate Tectonics: too weak to build mountains
... has continued since the early 1970s, with increasing sophistication but still no general solution. There has long been a preference for top-down, density-driven slab pull as the dominant driver of plate tectonics. Sometimes this is simply stated as a fact".1 "One of the most uncomfortable contradict ...
... has continued since the early 1970s, with increasing sophistication but still no general solution. There has long been a preference for top-down, density-driven slab pull as the dominant driver of plate tectonics. Sometimes this is simply stated as a fact".1 "One of the most uncomfortable contradict ...
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.