lessons 4 and 5
... Unit Objectives: By the end of this unit pupils will be able to: 1. Understand the global distribution of tectonic activity and its relationship with the plate boundaries. 2. Understand the nature, cause and effects of earthquakes and volcanic eruptions. 3. Be aware of human responses to hazards ass ...
... Unit Objectives: By the end of this unit pupils will be able to: 1. Understand the global distribution of tectonic activity and its relationship with the plate boundaries. 2. Understand the nature, cause and effects of earthquakes and volcanic eruptions. 3. Be aware of human responses to hazards ass ...
Do Now - North Thurston Public Schools
... move and the volcano moves off the hotspot, and becomes inactive and just an island. A new volcano will begin to form on the ocean floor and as it peaks above the ocean surface it will become the new active volcanic island in the chain (ex. Hawaiian Islands) • In the case of a continental hotspot, t ...
... move and the volcano moves off the hotspot, and becomes inactive and just an island. A new volcano will begin to form on the ocean floor and as it peaks above the ocean surface it will become the new active volcanic island in the chain (ex. Hawaiian Islands) • In the case of a continental hotspot, t ...
earth space science review problem sheet
... ___ 10. Fossils of tropical plants found on an island in the Arctic Ocean are evidence for the theory of a. continental drift. b. ocean currents. c. earthquakes. d. subduction. ___ 11. Subduction is a. a device that bounces sound waves off underwater objects. b. the direct transfer of heat through s ...
... ___ 10. Fossils of tropical plants found on an island in the Arctic Ocean are evidence for the theory of a. continental drift. b. ocean currents. c. earthquakes. d. subduction. ___ 11. Subduction is a. a device that bounces sound waves off underwater objects. b. the direct transfer of heat through s ...
Earthsci1
... it becomes more effective as a thermal insulator. For this reason the rate at which heat is lost from the Earth decreases to a self-regulated minimum value. It is currently estimated that although the rate of radioactive heat production 3 billion years ago was twice the rate it is today, the mean te ...
... it becomes more effective as a thermal insulator. For this reason the rate at which heat is lost from the Earth decreases to a self-regulated minimum value. It is currently estimated that although the rate of radioactive heat production 3 billion years ago was twice the rate it is today, the mean te ...
here - ScienceA2Z.com
... to study the ocean floor, they discovered a surprising pattern. Measurements of magnetic variations showed that, in many areas, alternating bands of rocks recording normal and reversed polarity were arranged symmetrically about mid-ocean ridges (Fig. 5). In 1963, F. Vine and D.H. Matthews reasoned t ...
... to study the ocean floor, they discovered a surprising pattern. Measurements of magnetic variations showed that, in many areas, alternating bands of rocks recording normal and reversed polarity were arranged symmetrically about mid-ocean ridges (Fig. 5). In 1963, F. Vine and D.H. Matthews reasoned t ...
Geology 101 minutes to complete the 50-point quiz. first sentence
... b. Is the fault older than the dike? c. If the dike is dated radiometrically as 70 million years old, is that date consistent or inconsistent with the fossil information? 3. (3 points) Still referring to the cross-section above, circle the correct choice within the parentheses: a. This area was or i ...
... b. Is the fault older than the dike? c. If the dike is dated radiometrically as 70 million years old, is that date consistent or inconsistent with the fossil information? 3. (3 points) Still referring to the cross-section above, circle the correct choice within the parentheses: a. This area was or i ...
Atmosphere, Hydrosphere, and Lithosphere
... nitrogen 21% oxygen small amount remaining is composed of carbon dioxide and other gasses. ...
... nitrogen 21% oxygen small amount remaining is composed of carbon dioxide and other gasses. ...
Solid-state convection in Earth`s deep interior and the origin of
... cause of volcanic islands and volcanic fields in the interior of the continents. Such places include the islands of Hawaii and Iceland, and areas such as the Siberian Traps and the volcanoes of Italy and East Africa. Two radically different views have emerged, known as the Plate-, and the Plume hypo ...
... cause of volcanic islands and volcanic fields in the interior of the continents. Such places include the islands of Hawaii and Iceland, and areas such as the Siberian Traps and the volcanoes of Italy and East Africa. Two radically different views have emerged, known as the Plate-, and the Plume hypo ...
Benchmark 3 Study Guide Key
... Mid-Ocean Ridge, Rift Valley, earthquake 15. What geological event takes place at transform boundaries? Earthquake 16. What geological features are created at convergent boundaries with subduction? Ocean trench/volcanoes 17. What causes plate tectonic movement? Convection of the magma in the astheno ...
... Mid-Ocean Ridge, Rift Valley, earthquake 15. What geological event takes place at transform boundaries? Earthquake 16. What geological features are created at convergent boundaries with subduction? Ocean trench/volcanoes 17. What causes plate tectonic movement? Convection of the magma in the astheno ...
Plate Tectonics
... 2. Plates moving together – convergent boundaries. a. Denser plates sink under less dense plates (subduction zones). b. Newly formed hot magma forced upward forms volcanic mountains. ...
... 2. Plates moving together – convergent boundaries. a. Denser plates sink under less dense plates (subduction zones). b. Newly formed hot magma forced upward forms volcanic mountains. ...
3A_Internal_Earth_Structure
... one” and what to do? How to deal with the potential consequence? ...
... one” and what to do? How to deal with the potential consequence? ...
Geography Plate Tectonics Earthquakes Volcanoes
... The most dramatic volcanic action is an eruption, in which hot lava, gases, ash, dust, and rocks explode out of vents in the earth’s crust. ...
... The most dramatic volcanic action is an eruption, in which hot lava, gases, ash, dust, and rocks explode out of vents in the earth’s crust. ...
Today`s Warm-Up Friday, January 10
... – Energy waves from earthquakes, change path and speed as they move through the Earth. Why? – Waves travel differently through different materials ...
... – Energy waves from earthquakes, change path and speed as they move through the Earth. Why? – Waves travel differently through different materials ...
Chapter 6
... • How was paleomagnetism used to show that lithosphere forms at mid-ocean ridges and then migrates away? • How did features of the seafloor engender the concept of plate tectonics? • Why do faulting and volcanism occur along oceanic plate margins? • What causes lithospheric plates to move? ...
... • How was paleomagnetism used to show that lithosphere forms at mid-ocean ridges and then migrates away? • How did features of the seafloor engender the concept of plate tectonics? • Why do faulting and volcanism occur along oceanic plate margins? • What causes lithospheric plates to move? ...
The Sea floor: Layers of the earth
... Outside of the mantle is the earth’s crust Outer-most layer of the earth Very thin Contains the oceans and the continents ...
... Outside of the mantle is the earth’s crust Outer-most layer of the earth Very thin Contains the oceans and the continents ...
GEOL 2312 IGNEOUS AND METAMORPHIC PETROLOGY Lecture
... Cross-section of the mantle based on a seismic tomography model. Arrows represent plate motions and large-scale mantle flow and subduction zones represented by dipping line segments. EPR =- East pacific Rise, MAR = Mid-Atlantic Ridge, CBR = Carlsberg Ridge. Plates: EA = Eurasian, IN = Indian, PA = P ...
... Cross-section of the mantle based on a seismic tomography model. Arrows represent plate motions and large-scale mantle flow and subduction zones represented by dipping line segments. EPR =- East pacific Rise, MAR = Mid-Atlantic Ridge, CBR = Carlsberg Ridge. Plates: EA = Eurasian, IN = Indian, PA = P ...
File
... Earthquakes are caused by the movement of the world’s tectonic plates. Most earthquakes occur at plate boundaries so the study of these boundaries can help us understand the depth, location and magnitude (on the Richter Scale) of earthquakes. The theory of plate tectonics explains how the earth’s cr ...
... Earthquakes are caused by the movement of the world’s tectonic plates. Most earthquakes occur at plate boundaries so the study of these boundaries can help us understand the depth, location and magnitude (on the Richter Scale) of earthquakes. The theory of plate tectonics explains how the earth’s cr ...
KArl quilligan plate tectonics powerpoint
... Section 3 Divergent Boundaries – locations where plates are moving away from each other, occurs above rising convection currents -Hazards include volcanic “leaks.” A volcanic leak is when lava runs down hills; it doesn’t erupt, it just leaks. You also have to be careful of rifts and rift valleys; t ...
... Section 3 Divergent Boundaries – locations where plates are moving away from each other, occurs above rising convection currents -Hazards include volcanic “leaks.” A volcanic leak is when lava runs down hills; it doesn’t erupt, it just leaks. You also have to be careful of rifts and rift valleys; t ...
Geog 101: Chapter 3 Quiz
... land formation. 2. Of what is the lithosphere composed? 3. Where are earthquakes most likely to occur? 4. What is the place where the earth’s crust actually moves in an earthquake called? 5. What factors influence the amount of ground shaking caused by earthquakes? 6. What is the nature and behavior ...
... land formation. 2. Of what is the lithosphere composed? 3. Where are earthquakes most likely to occur? 4. What is the place where the earth’s crust actually moves in an earthquake called? 5. What factors influence the amount of ground shaking caused by earthquakes? 6. What is the nature and behavior ...
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.