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• Select Earthquake in Nepal (2015)

  1

  Earthquake in Nepal (2015)

  Author:K. Lee LernerFrom:The Gale Encyclopedia of Science (Vol. 3. 6^th ed.)

  2021644 words Event overview 1240LOn April 25, 2015, a 7.8 magnitude earthquake struck the central and western regions of Nepal. The epicenter, located 50 mi (80 km) northwest of Nepal's capital of Kathmandu, produced strong, devastating, and deadly...
• Select Earthquake in Mexico (2017)

  2

  Earthquake in Mexico (2017)

  Author:K. Lee LernerFrom:The Gale Encyclopedia of Science (Vol. 3. 6^th ed.)

  20211,263 words Event overview 1340LOn September 19, 2017, a magnitude 8.2 (Mw) earthquake, now known as the 2017 Chiapas earthquake, struck Central Mexico causing extensive damage in Mexico City and across the states of Morelos and Puebla. It was the...
• Select Geyser

  3

  Geyser

  Editors:Katherine H. Nemeh and Jacqueline L. LongeFrom:The Gale Encyclopedia of Science (Vol. 3. 6^th ed.)

  2021780 words Topic overview 1150LA geyser, a type of hot spring, is an intermittent or semi-regularly periodic spout of geothermally heated groundwater and steam. The word geyser comes from the name of a single Icelandic geyser, Geysir (located in...
• Select Continent

  4

  Continent

  Author:Clay HarrisFrom:The Gale Encyclopedia of Science (Vol. 2. 6^th ed.)

  20211,992 words Topic overview 1260LA continent is a large land mass and its surrounding shallow continental shelf. Both are composed primarily of granite, which is lighter than the liquid mantle of the Earth and therefore floats upon it like cork on...
• Select Asthma

  5

  Asthma

  Authors:Kathleen Scogna and Brenda Wilmoth LernerFrom:The Gale Encyclopedia of Science (Vol. 1. 6^th ed.)

  20211,418 words Disease/Disorder ove... 1190LAsthma, which is derived from the Greek word aazein meaning “sharp breath,” is a lung disease that affects approximately 20 million people in the United States. In the United States as of 2020, approximately 5.5 million...
• Select Europe

  6

  Europe

  Editors:Katherine H. Nemeh and Jacqueline L. LongeFrom:The Gale Encyclopedia of Science (Vol. 3. 6^th ed.)

  20215,239 words Geographic overview 1240LThe continent of Europe is a landmass bounded on the east by the Ural Mountains, on the south by the Mediterranean Sea, and on the north and west by the Arctic and Atlantic Oceans. Numerous islands around this landmass...
• Select Continental Drift

  7

  Continental Drift

  Authors:Ed Fox and K. Lee LernerFrom:The Gale Encyclopedia of Science (Vol. 2. 6^th ed.)

  20211,848 words Topic overview 1440LThe relative movement of Earth's continents is explained by the modern theory of plate tectonics, where lithospheric plates—which include traditionally identified continents—move over the asthenosphere, the molten,...
• Select Plate Tectonics

  8

  Plate Tectonics

  Authors:K. Lee Lerner and Clay HarrisFrom:The Gale Encyclopedia of Science (Vol. 6. 6^th ed.)

  20213,886 words Topic overview 1430LPlate tectonics is the theory explaining geologic changes that result from the movement of Earth's rigid lithospheric plates over the ductile asthenosphere. Plates move and shift their positions relative to one another,...
• Select Fault

  9

  Fault

  Author:Gillian S. HolmesFrom:The Gale Encyclopedia of Science (Vol. 3. 6^th ed.)

  20212,537 words Topic overview 1300LA fault is a geologic term describing a fracture at which two bodies of rock have been displaced relative to each other. Bedrock faults are those in which bodies of rock meet; small, local movements may occur on bedrock...