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Submarine hydrothermal vents: Hot springs on the seafloor OCN 201
Submarine hydrothermal vents: Hot springs on the seafloor OCN 201

... Many regions not sampled, but probably have active venting ...
Study Questions for Exam #2
Study Questions for Exam #2

... b. The level in the ground below the confining beds of an aquifer c. The level in the ground where potable water may first be found d. The level in the ground that feeds springs What is an artesian well? a. A confined aquifer b. An unconfined aquifer c. A well used by artisans d. A confined aquifer ...
File
File

... a. Oceanic-oceanic convergence b. Oceanic-continental convergence c. Continental-continental convergence d. Divergence 18. Use the diagram to answer the question. Where the oceanic plate is begin dragged below the continental plate, the area is called a. A deep ocean trench b. A subduction zone c. A ...
Document
Document

... region provide scientists an opportunity to study first hand how the Atlantic may have begun to form about 200 million years ago. Geologists believe that, if spreading continues, the three plates that meet at the edge of the present-day African continent will separate completely, allowing the Indian ...
File
File

... moving toward each other. One type of convergent boundaries is when continental crust converges and collides with another continental crust. Because continental rocks are too buoyant to be forced into the mantle, the colliding edges of the continents are crumpled and uplifted to form a ...
Geology 103
Geology 103

... - Production is highest in shallow oceans (photic zone) and shelf environments 2) Photosynthesis - Ocean plants (phytoplankton) remove dissolved CO2 from seawater, produce carbohydrates (cellular material) - ex: bacteria (not true plants), diatoms, coccoliths, dinoflagellates - Causes CO2 concentrat ...
Intro2-3
Intro2-3

... mountain ranges are formed. Mountains are also created when two continental plates collide. When plates separate, usually on the ocean floor, they cause gaps in the planet’s crust. Magma, or liquid rock, rises through the cracks as lava. As it cools, it forms underwater mountains or ridges. Sometime ...
2 The NorTh-easT aTlaNTic - The Quality Status Report 2010
2 The NorTh-easT aTlaNTic - The Quality Status Report 2010

... the easterly Azores Current that coincides with the southern boundary of the OSPAR area. Region V is sub-divided into two biogeographic ­regions. To the north of 40° N, the deep mixing of the water column during winter and its stratification in summer results in a strong seasonal cycle of primary pr ...
Press Release - English ()
Press Release - English ()

... Scientists will share their experiences during the cruise via blogs at https://deepcarbon.net/feature/dcot-limit-blog and on the Expedition 370 website, http://www.jamstec.go.jp/chikyu/e/exp370/. Interested individuals can engage with the mission by guessing the temperature limit of life under the ...
A Sea Change in Ocean Drilling
A Sea Change in Ocean Drilling

... Together, the two ships will enable earth scientists to bore more and much deeper holes than is currently possible and in locations that are now inaccessible. There are even going to be “mission-specific platforms” that will drill niche locations such as the icy Arctic Ocean and shallow coastal wate ...
Convection in the Mantle and The Theory of Plate Tectonics
Convection in the Mantle and The Theory of Plate Tectonics

... • Land features: mountain ranges and coal fields appear to line up according to the shape of continents. • Fossils: from ancient animals appear to link continents together as well- mesosaurus, lystrosaurus (freshwater reptiles), glossopteris (plant). • Climate: temperature changes at specific locati ...
Plate Tectonics and Global Impacts – Tutorial Script - FOG
Plate Tectonics and Global Impacts – Tutorial Script - FOG

... Plate Tectonics and Global Impacts – Tutorial Script Where can we find plate boundaries on the planet? Well the best way to see plate boundaries is to look for the major earthquakes. Earthquakes form when building stresses within the Earth’s solid crust are released in single instants of motion. The ...
Plate Tectonics
Plate Tectonics

... Some mountains are the result of volcanic activity. Volcanoes may be found along plate boundaries. There are currently about 600 active volcanoes on land. Many are found along the Pacific Rim or what is called the ”Ring of Fire”. A few develop over wha is called a “hot spot”. This is an area where ...
Ch 17 Plate Tectonics
Ch 17 Plate Tectonics

... ES Ch 17 Plate Tectonics Note Outline ...
Plate Tectonics Continental Drift
Plate Tectonics Continental Drift

... • Stated that the continents had once been joined to form a single supercontinet • First proposed by Alfred Weagner ...
chapter 3 - McGraw Hill Higher Education
chapter 3 - McGraw Hill Higher Education

... - When seamounts rise above the sea surface to become islands they are subjected to the erosional power of wind and waves. Some of them have their peaks eroded flat and later sink beneath the surface as a result of sea floor subsidence with time and spreading away from the ridge, as well as the weig ...
Earth,Notes,RevQs,Ch13
Earth,Notes,RevQs,Ch13

... west coast of South America represents an active continental margin that is characterized by subduction, volcanism, and earthquakes; all evidence of a tectonically active region. 6. To a great extent, the Pacific Ocean is rimmed by deep ocean trenches or deep near-shore basins that trap sediment and ...
Study Guide for Plate Tectonics
Study Guide for Plate Tectonics

... but he couldn’t explain how Pangaea broke apart and drifted away, so nobody believed his theory. Sea-floor spreading supplied the missing answers.  Scientists discovered underwater volcanoes, when using sonar to “map” the ocean floor.  Then scientists used a magnetometer to discover that there are ...
Unit 2: Earth`s Systems
Unit 2: Earth`s Systems

... Earth as a system consists of rock, air, water and living things that interact with each other. Tectonic plates are the boundaries where volcanoes, earthquakes and mountain building happens. Describe how wind and water alter Earths surface. Earths atmosphere is composed almost entirely of Nitrogen a ...
Ch09Pres - Leornian.org
Ch09Pres - Leornian.org

... Structure of Marine Ecosystems – An ecosystem is a fundamental subdivision of the Earth system in which communities of organisms interact with one another and with the physical conditions and chemical substances of their habitats. • All ecosystems have both living (biotic) and nonliving (abiotic) c ...
Plate Tectonics Test Study Guide
Plate Tectonics Test Study Guide

...  Describe how geologists have learned about the Earth’s inner structures.  Describe characteristics of the Earth’s crust, mantle and core. Section 1: Key Terms ...
Plate Tectonics Test Study Guide (A)
Plate Tectonics Test Study Guide (A)

...  Describe how geologists have learned about the Earth’s inner structures.  Describe characteristics of the Earth’s crust, mantle and core. Section 1: Key Terms seismic waves- vibrations that travel through Earth carrying the energy released during an earthquake pressure- the force exerted on a sur ...
Emerging scientific challenges at the interface of surface and deep
Emerging scientific challenges at the interface of surface and deep

... 1. Measuring and understanding the response of the solid earth to change in glacier loading. The history of ice volume change is poorly constrained, particularly in Antarctica. Projecting volume loss and sea level changes into the future requires that the rate of historical changes, and the controls ...
Chapter 4 - McGraw Hill Higher Education
Chapter 4 - McGraw Hill Higher Education

... - When seamounts rise above the sea surface to become islands they are subjected to the erosional power of wind and waves. Some of them have their peaks eroded flat and later sink beneath the surface as a result of sea floor subsidence with time and spreading away from the ridge, as well as the weig ...
Chapter 4
Chapter 4

... - lower pressure of rising air allows air to expand resulting in lower temperature c. heating - air sinks, pressure increases decreasing in volume, and temperatures increase ...
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Ocean



An ocean (from Ancient Greek Ὠκεανός, transc. Okeanós, the sea of classical antiquity) is a body of saline water that composes much of a planet's hydrosphere. On Earth, an ocean is one of the major conventional divisions of the World Ocean, which covers almost 71% of its surface. These are, in descending order by area, the Pacific, Atlantic, Indian, Southern, and Arctic Oceans. The word sea is often used interchangeably with ""ocean"" in American English but, strictly speaking, a sea is a body of saline water (generally a division of the world ocean) partly or fully enclosed by land.Saline water covers approximately 72% of the planet's surface (~3.6×108 km2) and is customarily divided into several principal oceans and smaller seas, with the ocean covering approximately 71% of Earth's surface. The ocean contains 97% of Earth's water, and oceanographers have stated that only 5% of the World Ocean has been explored. The total volume is approximately 1.35 billion cubic kilometers (320 million cu mi) with an average depth of nearly 3,700 meters (12,100 ft).As it is the principal component of Earth's hydrosphere, the world ocean is integral to all known life, forms part of the carbon cycle, and influences climate and weather patterns. It is the habitat of 230,000 known species, although much of the oceans depths remain unexplored, and over two million marine species are estimated to exist. The origin of Earth's oceans remains unknown; oceans are thought to have formed in the Hadean period and may have been the impetus for the emergence of life.Extraterrestrial oceans may be composed of water or other elements and compounds. The only confirmed large stable bodies of extraterrestrial surface liquids are the lakes of Titan, although there is evidence for the existence of oceans elsewhere in the Solar System. Early in their geologic histories, Mars and Venus are theorized to have had large water oceans. The Mars ocean hypothesis suggests that nearly a third of the surface of Mars was once covered by water, and a runaway greenhouse effect may have boiled away the global ocean of Venus. Compounds such as salts and ammonia dissolved in water lower its freezing point, so that water might exist in large quantities in extraterrestrial environments as brine or convecting ice. Unconfirmed oceans are speculated beneath the surface of many dwarf planets and natural satellites; notably, the ocean of Europa is estimated to have over twice the water volume of Earth. The Solar System's giant planets are also thought to have liquid atmospheric layers of yet to be confirmed compositions. Oceans may also exist on exoplanets and exomoons, including surface oceans of liquid water within a circumstellar habitable zone. Ocean planets are a hypothetical type of planet with a surface completely covered with liquid.
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