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Mauna Kea - National Geographic
Mauna Kea - National Geographic

... The geologic landscape of Hawaii’s islands has changed greatly over time, which has also impacted its ecologic landscape. As Hawaii’s volcanic islands rise and fall, organisms must adapt to a series of transitional habitats both above and below the ocean surface. In terms of the habitats and species ...
Earth`s Interior Convection and the MantleSection 2 Summary
Earth`s Interior Convection and the MantleSection 2 Summary

... several continents matched so well, like the pieces of a jigsaw puzzle. He formed a hypothesis that Earth's continents had moved! Wegener's hypothesis was that all the continents were once joined together in a single landmass and have since drifted apart. He named this supercontinent Pangaea, meanin ...
Changing Earth`s Surface
Changing Earth`s Surface

... _________________: A force that acts on rock to change its shape or volume. _________________: An area where magma from deep within the mantle melts through the crust above it. _________________: A type of fault where the hanging wall slides downward; caused by tension in the crust. ________________ ...
Example
Example

... are in slow, constant motion, driven by convection currents in the mantle. • PT explains the formation, movement, and subduction of Earth’s plates ...
Convection Currents Lab
Convection Currents Lab

... Convection currents in the mantle form and transfer heat as rock slowly rises toward the top of the mantle. The rock is still hard, but it flows very slowly like a fluid. As the rock rises, it cools and sinks back down into the mantle. As with all convection currents, convection in Earth’s mantle is ...
chapter 8 - Team Strength
chapter 8 - Team Strength

... 40. The type of plate boundary where plates move apart, resulting in upwelling of material from the mantle to create new seafloor, is referred to as a(n) ____________________ plate boundary. 41. A chain of small volcanic islands that forms when two oceanic plates converge, one descending beneath the ...
GEOL 1e Lecture Outlines
GEOL 1e Lecture Outlines

... • Common in Pacific Ocean basin • Earthquakes along Benioff zones • Volcano chain on overriding plate ...
University of Groningen Ocean Carbon Cycle and Climate
University of Groningen Ocean Carbon Cycle and Climate

... h GEOMAR, Forschungszentrum fiir Marine Geowissenschaften an der Cnristian-AIbrechts-UniversiEit zu Kiel, Kiel, Germany ...
1 Proposal from The Partnership for Observation of the Global Oceans
1 Proposal from The Partnership for Observation of the Global Oceans

... changes will affect marine ecosystems and marine biodiversity. For example, the latest IPCC report warns of the immense threat to the coral ecosystems in general, and to the Great Barrier Reef in particular. The increasing acidification of the ocean waters due to the dissolution of excess carbon dio ...
Preview Sample 1
Preview Sample 1

... 1. The process of plate tectonics is occurring today in the same way as in the past. Can you project future positions of the continents by looking at a map of their present positions and the positions of the mid-ocean ridges (see fig., 2.5)? What oceans are growing and which are shrinking? Where wil ...
Plate Tectonics
Plate Tectonics

... – Each number represents 32 x increase in energy ...
Earth interior
Earth interior

... Vertical axis: list of 63 elements Horizontal axis: proportions of the element in each layer normalized to 1 ...
sea-floor spreading
sea-floor spreading

... Tectonic plates: Pieces of lithosphere that move around on top of the asthenosphere. Take a look. Are the plates just continental or oceanic or are they a combination of both? ...
Venus
Venus

... •  From
the
perspecVve
of
the
Earth,
Venus
has
phases
like
 our
moon.
This
is
because
Venus
is
located
inside
the
orbit
 of
the
Earth.
And
unlike
Mars,
Jupiter
and
other
planets
 outside
Earth’s
orbit,
we
don’t
always
see
the
sunlit
side
 •  Clouds
are
composed
of
sulfuric
acid
(H2SO4,
really
nasty
 ...
English version
English version

... The Earth’s crust is always in motion, the continental rocks you are standing on are slowly moving, driven by a process geologists call plate tectonics. Molten rock from the Earth’s interior rises to the surface to create new crust. As it rises and cools the new crust expands along volcanic mountain ...
Boundaries are an increasingly prominent feature of ocean policy
Boundaries are an increasingly prominent feature of ocean policy

... Print Page ...
- Catalyst - University of Washington
- Catalyst - University of Washington

... About 240 M.Y. ago the super-continent Pangaea began to break-up. Note the latitudinal distribution of the continental land masses and configuration of the ocean basins. An equatorial current existed along the Tethyan Seaway. Increased sea floor spreading added CO2 to the atmosphere directly from vo ...
Marine Ecosystems
Marine Ecosystems

... found in both the Pacific and Atlantic Oceans at an average underwater depth of about 2,100 meters (7,000 feet). They are concentrated along the Mid-Ocean Ridge. The Mid-Ocean Ridge is the underwater mountain chain that winds its way around the globe. Hydrothermal vent ecosystems support familiar, y ...
Unit Six Notes
Unit Six Notes

... The thing is…the world didn’t always look like this! It used to look like this: ...
Hydrosphere and cryosphere
Hydrosphere and cryosphere

... 2 m over the surface). The main cause of motion in both, the atmosphere and the ocean is the non-uniform solar heating: a collimated energy beam, pointing to different places as the Earth rotates around its axis daily, and revolves around the Sun yearly. The ocean is the set of interconnecting water ...
AICE Env Day 5 Evidence of Plate Tectonics Stations
AICE Env Day 5 Evidence of Plate Tectonics Stations

... webbed feet and long tail worked like powerful paddles as it chased and captured its food. Like all other reptiles, Mesosaurus breathed air, so it had to return to the surface after hunting underwater. Freshwater ponds and lakes were its habitat. In the 1800s, scientists began finding fossils of the ...
Some reflections on the charts of the ocean floor: Do they hide more
Some reflections on the charts of the ocean floor: Do they hide more

... of the ocean disappeared by subduction but also the ridge itself and parts originally situated west of it. Along South America “only” the older Mesozoic and (?)Pre-Mesozoic parts of the ocean disappeared while in the Western Pacific there still exist large areas of Mesozoic oceanic crust. That’s wha ...
Estuarine Environments
Estuarine Environments

... !   Nearly 900 individual estuaries in the continental US !   Atlantic & Gulf Coasts - border broad continental shelf - have extensive marshes - older !   Pacific Coast - formed by tectonic activity, deep, narrow shelf, salt marshes small or absent - younger ...
Chapter 10: Siliciclastic Marine Environments The Shelf
Chapter 10: Siliciclastic Marine Environments The Shelf

... generated by storms that originate far out to sea. Storm waves: stronger more energenic waves that accompany storm activity on the shelf. They erode the beachface and upper shoreface. Wind-forced currents: unidirectional currents generated by wind-shear stress as wind blows across the water surface, ...
Notes_-_Earths_Layers
Notes_-_Earths_Layers

...  Rocks are more dense, darker in color than continental crust Mantle  Lies underneath the crust  2900 Km thick  The lithosphere is a zone made of the upper mantle and entire crust. It is made of cool, hard rock.  Most (but not the very upper part) of the mantle is plastic rock: is both solid an ...
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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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