Near-Earth Object Impact Articles

• Geology
  Earth Science
  Earthquakes
  Near-Earth Object Impacts
  Natural Disasters
  Environmental Issues
   
  

  Continental crust

  The continental crust is the layer of granitic, sedimentary and metamorphic rocks which form the continents and the areas of shallow seabed close to their shores, known as continental shelves. It is ... > more
• Geology
  Earth Science
  Atmosphere
  Earthquakes
  Geochemistry
  Natural Disasters
   
  

  Geophysics

  Geophysics, the study of the earth by quantitative physical methods, especially by seismic reflection and refraction, geodesy, gravity, magnetic, electrical, electromagnetic, and radioactivity ... > more
• Aviation
  Atmosphere
  Sports Science
  Vehicles
  Global Warming
  Floods
   

  Altitude

  Altitude is the elevation of an object from a known level or datum. Common datums are mean sea level and the surface of the WGS-84 geoid, used by GPS. In the United States and the UK aviation ... > more
• Geology
  Fossils
  Earth Science
  Origin of Life
  Early Climate
  Earthquakes
   
  

  Precambrian

  The Precambrian is an informal name for the eons of the geologic timescale that came before the current Phanerozoic eon. It spans from the formation of Earth around 4500 Ma (million years ago) to the ... > more
• Water
  Geography
  Ecosystems
  Global Warming
  Ecology
  Floods
   
  

  Lake

  A lake is a body of water or other liquid of considerable size surrounded entirely by land. A vast majority of lakes on Earth are fresh water, and most lie in the Northern Hemisphere at higher ... > more
• Geomagnetic Storms
  Sun
  Solar Flare
  Renewable Energy
  Energy and the Environment
  Wind Energy
   
  

  Solar wind

  A solar wind is a stream of charged particles (i.e., a plasma) which are ejected from the upper atmosphere of a star. When originating from stars other than the Earth's Sun, it is sometimes called a ... > more
• Volcanoes
  Natural Disasters
  Fossils
  Origin of Life
  Earthquakes
  Earth Science
   

  Supervolcano

  A supervolcano refers to a volcano that produces the largest and most voluminous kinds of eruption on Earth. The actual explosivity of these eruptions varies, but the sheer volume of extruded magma ... > more
• Rainforests
  Geology
  Volcanoes
  Earthquakes
  Natural Disasters
  Earth Science
   
  

  Hotspot (geology)

  In geology, a hotspot is a location on the Earth's surface that has experienced active volcanism for a long period of time. Hotspots were thought to be caused by a narrow stream of hot mantle ... > more
• Sun
  Geomagnetic Storms
  Solar Flare
  Renewable Energy
  Atmosphere
  Northern Lights
   
  

  Solar radiation

  Solar radiation is radiant energy emitted by the sun, particularly electromagnetic energy. About half of the radiation is in the visible short-wave part of the electromagnetic spectrum. The other ... > more
• Atmosphere
  Renewable Energy
  Weather
  Climate
  Severe Weather
  Environmental Science
   
  

  Hadley cell

  The major driving force of atmospheric circulation in the tropical regions is solar heating. Because of the Earth's 23.5 ° axial tilt, the sun is never more than a few tens of degrees from ... > more

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