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This graph shows the general trend of changing ice volume on the Earth over the last 750,000 years. The extent of ice is estimated using changes in the amount of different isotopes of oxygen found in planktonic foraminifera which occur as fossils. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Illustration - scientific
Subject: Cryology, Paleontology
 
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This document provides an explanation of the factors that are thought to drive the growth and retreat of continental glaciers which spread across the Earth during four periods of geologic history. These factors are thought ot be related to variations in Earth's orbit. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Ref. material
Subject: Cryology, Geologic time
 
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This document discusses possible factors that contributed to the formation of massive continental glaciers during four periods of geologic history. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Ref. material
Subject: Cryology, Geologic time, Hydrology, Physical oceanography
 
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This press release summarizes the results of research on sediment cores taken from the subtropical Atlantic Ocean. Analyses of organic molecules from planktonic algae in the sediments indicates that large and abrupt temperature changes in warm areas of the ocean occurred at the end of the last glacial period. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Ref. material
Subject: Environmental science, Chemical oceanography
 
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This illustration from an online textbook features a map showing the major ocean currents of the world. A set of links provides access to a study guide with glossary and test questions, additional readings, and links to related sites. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Map, Book - text
Subject: Physical oceanography
 
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This article describes the effects of a coronal mass ejection that occurred in January 1997, and the damage it caused to commercial and communications satellites. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Ref. material
Subject: Physics, Space science
 
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This document describes the features and properties of Earth's magnetosphere. Topics include the magnetosphere's shape, descriptions of its features, the Van Allen Belts, particle motions, and magnetic storms. Links to illustrations and tables are embedded on the text. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Ref. material
Subject: Physics, Space science
 
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This is a group of frequently asked questions and answers about Earth's magnetic field and poles, the magnetic compass, magnetic reversals, and geomagnetic models. Links to maps and illustrations are embedded in the text. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Ref. material
Subject: Geophysics, Physics
 
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Visitors to this site can access information on tropical storms and hurricanes in the Atlantic Ocean as far back as 1851. Information provided here includes a yearly map showing the tracks of all storms, and individual maps for each storm. The individual maps are accompanied by data tables that show latitude, longitude, wind speed, dates, and times. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Map, In-situ dataset, Remotely sensed dataset
Subject: Atmospheric science, Natural hazards
 
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This document outlines the development of the theory of contintental drift and how many lines of evidence collected over several decades by various researchers were brought together to explain how the seafloor spreads and the continents move about. Links to additional information are included. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Illustration - scientific, Map, Ref. material
Subject: Geology, Structural geology
 
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Results 21 - 30 of 147 <<  1 2 3 4 5 6 7  >>