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   Zone of fracture  
Subject: Geology
    The upper portion of a glacier consisting of brittle ice. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
   Zone of saturation  
Subject: Geology
    The zone where all open spaces in sediment and rock are completely filled with water. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
   Zone of wastage  
Subject: Geology
    The part of a glacier beyond the snowline where annually there is a net loss of ice. Reference:Tarbouk, E.J. & F.K. Lutgens, (2006), EARTH, 8th edition, Pearson Education International.
 
 
  
   Zoom Transfer Scope  
Subject:  Laboratories
    Zoom Transfer Scope or ZTS is an optical-mechanical device. With it you can view and overlay two images through separate optical paths. Usually one eye views a reference map and the other a portion of a color airphoto. The scale, position, and orientation of either optical path can be changed so that the airphoto matches the map in some local area


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   zooplankton  
Subject: The Earth
    That portion of the plankton community comprised of tiny aquatic animals eaten by fish.
 
 
  
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