Earth Science Articles

• Water
  Natural Disasters
  Floods
  Geology
  Earth Science
  Earthquakes
   
  

  Quicksand

  Quicksand is loose, water-logged soil that yields easily to weight or pressure. It can be formed when sand, silt, clay, or other grainy soil is saturated or supersaturated by water flowing from below ... > more
• Biodiversity
  Ecology
  Ecology Research
  Nature
  Extinction
  Endangered Plants
   
  

  Biodiversity

  Biodiversity or biological diversity is the diversity of life. There are a number of definitions and measures of biodiversity. Biodiversity is commonly identified at three levels. First there is ... > more
• Climate
  Global Warming
  Weather
  Environmental Issues
  Ice Ages
  Environmental Policy
   
  

  Climate

  The climate is the weather averaged over a long period of time. Weather is the combination of events in the atmosphere and climate is the overall accumulated weather in a certain location. Over ... > more
• Earthquakes
  Geology
  Natural Disasters
  Tsunamis
  Geography
  Earth Science
   
  

  Plate tectonics

  Plate tectonics is a theory of geology developed to explain the phenomenon of continental drift and is currently the theory accepted by the vast majority of scientists working in this area. In the ... > more
• Water
  Floods
  Environmental Issues
  Pollution
  Sustainability
  Landslides
   
  

  Surface runoff

  Surface runoff is water, from rain, snowmelt, or other sources, that flows over the land surface, and is a major component of the water cycle. Runoff that occurs on surfaces before reaching a channel ... > more
• Microbes and More
  Microbiology
  Fungus
  Developmental Biology
  Soil Types
  Organic
   

  Microorganism

  A microorganism or microbe is an organism that is so small that it is microscopic (invisible to the naked eye). Microorganisms are often illustrated using single-celled, or unicellular organisms; ... > more
• Geography
  Fossils
  Earth Science
  Geology
  Origin of Life
  Environmental Policy
   

  Cenozoic

  The Cenozoic Era is the most recent of the four classic geological eras. The Cenozoic is divided into two periods, the Palaeogene and Neogene, and they are in turn divided into epochs. The Palaeogene ... > more
• Geology
  Nature of Water
  Sports Science
  Atmosphere
  Floods
  Water
   
  

  Sedimentary rock

  Sedimentary rock is one of the three main rock groups (along with igneous and metamorphic rocks) and is formed in four main ways: by the deposition of the weathered remains of other rocks (known as ... > more
• Global Warming
  Oceanography
  El Nino and La Nina
  Climate
  Floods
  Geography
   
  

  Sea level

  Mean sea level (MSL) is the average (mean) height of the sea, with reference to a suitable reference surface. Defining the reference level, however, involves complex measurement, and accurately ... > more
• Ozone Holes
  Environmental Issues
  Atmosphere
  Air Quality
  Air Pollution
  Pollution
   
  

  Ozone layer

  The ozone layer is the part of the Earth's atmosphere which contains relatively high concentrations of ozone (O3). "Relatively high" means a few parts per million - much higher than the ... > more

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