Earth Science Articles

• Trees
  Botany
  Forest
  Nature
  Exotic Species
  Invasive Species
   
  

  Tree

  A tree can be defined as a large, perennial, woody plant. Though there is no set definition regarding minimum size, the term generally applies to plants at least 6 m (20 ft) high at maturity and, ... > more
• Air Quality
  Environmental Issues
  Energy and the Environment
  Ozone Holes
  Air Pollution
  Wildfires
   

  Refrigerant

  A refrigerant is a compound used in a heat cycle that undergoes a phase change from a gas to a liquid and back. The two main uses of refrigerants are refrigerators/freezers and air conditioners. Cf. ... > more
• Energy and the Environment
  Petroleum
  Renewable Energy
  Environmental Science
  Oil Spills
  Fossil Fuels
   
  

  Biodiesel

  Biodiesel refers to a diesel-equivalent, processed fuel derived from biological sources. Though derived from biological sources, it is a processed fuel that can be readily used in diesel-engined ... > more
• Geography
  Global Warming
  Oceanography
  Earth Science
  Weather
  Climate
   
  

  Bermuda Triangle

  The Bermuda Triangle (also known as Devil's Triangle) is a 1.5-million-square-mile area of ocean roughly defined by Bermuda, Puerto Rico, and the southern tip of Florida. Some believe it is a ... > more
• Soil Types
  Water
  Agriculture and Food
  Environmental Issues
  Drought Research
  Drought
   
  

  Irrigation

  Irrigation (in agriculture) is the replacement or supplementation of rainfall with water from another source in order to grow crops. The water source for irrigation may be a nearby or distant body of ... > more
• Volcanoes
  Natural Disasters
  Earthquakes
  Geography
  Near-Earth Object Impacts
  Tsunamis
   
  

  Caldera

  A caldera is a volcanic feature formed by the collapse of a volcano into itself, making it a large, special form of volcanic crater. A caldera collapse is usually triggered by the emptying of the ... > more
• Hurricanes and Cyclones
  Severe Weather
  Weather
  Geography
  Storms
  Natural Disasters
   
  

  Hurricane Mitch

  Hurricane Mitch was one of the most powerful hurricanes ever observed, with maximum sustained winds of 180 mph (290 ... > more
• Hurricanes and Cyclones
  Severe Weather
  Storms
  Weather
  Climate
  Natural Disasters
   
  

  2005 Atlantic hurricane season

  The 2005 Atlantic hurricane season unexpectedly became the most active Atlantic hurricane season in recorded history, shattering previous records on repeated occasions. The impact of the season was ... > more
• Hurricanes and Cyclones
  Severe Weather
  Storms
  Geography
  Weather
  Tornadoes
   
  

  Hurricane Isabel

  Hurricane Isabel was the ninth named storm, the fifth hurricane, the second major hurricane, and the only Category 5 hurricane of the 2003 Atlantic hurricane ... > more
• New Species
  Nature
  Extinction
  Endangered Animals
  Ecology Research
  Biology
   
  

  Unified neutral theory of biodiversity

  The unified neutral theory of biodiversity and biogeography is a theory and the title of a monograph by ecologist Stephen Hubbell. The theory aims to explain the diversity and relative abundance of ... > more

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