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The capillary fringe is the subsurface layer in which groundwater seeps up from a water table by capillary action to fill pores. Pores at the base of the capillary fringe are filled with water due to tension saturation.
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Download free-response questions from past AP World History exams, along with scoring guidelines, sample responses from exam takers, and scoring distributions.
Responses were expected to address the time frame of the 19th through the early 20th centuries and to demonstrate the historical thinking skill of causation. The question addressed Topics 6.2 and 6.5 and Key Concepts 5.1, 5.2, and 5.4 of the AP World History Course Framework.
The capillary fringe is the zone above the water table where soil pores are filled with water due to capillary action, allowing moisture to rise from the saturated zone. This area plays a critical role in soil moisture dynamics and influences plant growth by providing access to water.
AP World History: Modern glossary of key terms with definitions, must-know facts, and related terms you need to know for your exam.
The capillary fringe is the layer of soil or sediment that exists above the water table where water is held in small pores due to capillary action. This zone is crucial for understanding soil moisture dynamics because it influences the availability of water to plants and affects groundwater recharge.