Volcano Articles

• Global Warming
  Environmental Issues
  Climate
  Environmental Policy
  Nature
  Air Quality
   
  

  Greenhouse gas

  Greenhouse gases are components of the atmosphere that contribute to the greenhouse effect. Some greenhouse gases occur naturally in the atmosphere, while others result from human activities such as ... > more
• Global Warming
  Geochemistry
  Air Quality
  Forest
  Climate
  Earth Science
   
  

  Carbon cycle

  The carbon cycle is the biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of the Earth. The cycle is usually thought of as four major ... > more
• Near-Earth Object Impacts
  Asteroids, Comets and Meteors
  Geology
  Saturn
  Earth Science
  Moon
   
  

  Impact crater

  An impact crater is a circular depression on a surface, usually referring to a planet, moon, asteroid, or other celestial body, caused by a collision of a smaller body (meteor) with 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
• Early Climate
  Ice Ages
  Climate
  Global Warming
  Nature of Water
  Snow and Avalanches
   
  

  Ice core

  An ice core is a core sample from the accumulation of snow and ice over many years that have recrystallized and have trapped air bubbles from previous time periods. The composition of these ice ... > more
• Caving
  Geography
  Global Warming
  Water
  Earth Science
  Rainforests
   
  

  Cave

  A cave is a natural underground void large enough for an adult human to enter. Some scientists stipulate that it must be large enough that some portion of it will not receive daylight; however, in ... > more
• Oil Spills
  Pollution
  Environmental Issues
  Hazardous Waste
  Fisheries
  Marine Biology
   
  

  Exxon Valdez

  Exxon Valdez was the original name of an oil tanker owned by the former Exxon Corporation. It gained widespread infamy after the March 24, 1989 oil spill in which the tanker hit Prince William ... > more
• Geography
  Geology
  Earth Science
  Earthquakes
  Oceanography
  Drought Research
   
  

  Pangaea

  Pangaea or Pangea is the name given to the supercontinent that existed during the Paleozoic and Mesozoic eras, before the process of plate tectonics separated each of the component continents into ... > more
• Geology
  Sports Science
  Climate
  Chemistry
  Inorganic Chemistry
  Nature of Water
   
  

  Metamorphic rock

  Metamorphic rock is the result of the transformation of a pre-existing rock type, the protolith, in a process called metamorphism, which means "change in form". The protolith is subjected to heat and ... > more
• Geography
  Earth Science
  Global Warming
  Volcanoes
  Oceanography
  Severe Weather
   
  

  Bering Strait

  The Bering Strait is a sea strait between Cape Dezhnev, Russia, the easternmost point (169 degrees 43' W) of the Asian continent and Cape Prince of Wales, Alaska, the westernmost point (168 degrees ... > more

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