Near-Earth Object Impact Articles

• Global Warming
  Ice Ages
  Climate
  Geography
  Oceanography
  Snow and Avalanches
   
  

  Antarctic ice sheet

  The Antarctic ice sheet is the largest single mass of ice on Earth. It covers an area of almost 14 million square km and contains 30 million cubic km of ice. Around 90 percent of the fresh water on ... > more
• Nature
  Oceanography
  Ecology
  Marine Biology
  Earth Science
  Global Warming
   

  Ocean acidification

  Ocean acidification is the name given to the ongoing decrease in the pH of the Earth's oceans, caused by their uptake of anthropogenic carbon dioxide from the atmosphere. Between 1751 and 2004 ... > more
• Geology
  Earthquakes
  Natural Disasters
  Sports Science
  Earth Science
  Geography
   
  

  Geologic fault

  Geologic faults or simply faults are planar rock fractures which show evidence of relative movement. Large faults within the Earth's crust are the result of shear motion and active fault zones are ... > more
• Volcanoes
  Geography
  Rainforests
  Environmental Policy
  Global Warming
  Climate
   
  

  Mount Kilimanjaro

  Kilimanjaro is a mountain in northeastern Tanzania. Kilimanjaro is the tallest free-standing mountain rise in the world, rising 4600 meters (15,000 ft) from the base, and includes the highest peak in ... > more
• Global Warming
  Oceanography
  Early Climate
  El Nino and La Nina
  Climate
  Geology
   
  

  Sequence stratigraphy

  Sequence stratigraphy is a relatively new branch of geology that attempts to link prehistoric sea-level changes to sedimentary deposits. The 'sequence' part of the name refers to cyclic sedimentary ... > more
• Acid Rain
  Rainforests
  Pollution
  Air Pollution
  Forest
  Environmental Science
   
  

  Rain

  Rain is a form of precipitation, other forms of which include snow, sleet, hail, and dew. Rain plays a major role in the hydrologic cycle in which moisture from the oceans evaporates, condenses into ... > more
• Weather
  Climate
  Global Warming
  Environmental Issues
  Severe Weather
  Earth Science
   

  Climate model

  Climate models use quantitative methods to simulate the interactions of the atmosphere, oceans, land surface, and ice. They are used for a variety of purposes from study of the dynamics of the ... > more
• Ice Ages
  Global Warming
  Climate
  Nature of Water
  Oceanography
  Snow and Avalanches
   
  

  Ice age

  An ice age is a period of long-term reduction in the temperature of Earth's climate, resulting in an expansion of the continental ice sheets, polar ice sheets and mountain glaciers. Glaciologically, ... > more
• Tsunamis
  Natural Disasters
  Albert Einstein
  Quantum Physics
  Earthquakes
  Optics
   
  

  Seismic wave

  A seismic wave is a wave that travels through the Earth, most often as the result of a tectonic earthquake, sometimes from an explosion. There are two types of seismic wave, namely, 'body wave' and ... > more
• Volcanoes
  Natural Disasters
  Healthy Aging
  Attention Deficit Disorder
  Sports Medicine
  Tsunamis
   
  

  Decade Volcanoes

  The Decade Volcanoes are 16 volcanoes identified by the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) as being worthy of particular study in light of their ... > more

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