What is the relationship between the instantaneous habitable zone and the continuously habitable zone around the Sun? How wide are these zones thought to be?
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The instantaneous habitable zone is the habitable zone of a star at a given moment in time.
The continuously habitable zone is the region in which a planet will always be in the instantaneous habitable zone for a given time window, usually from the birth of the star until 4.6 billion years afterwards.
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In the water budget, ________ is the major "receipt" and ________ is the major "expenditure."
A) precipitation; evapotranspiration B) evapotranspiration; precipitation C) outgassing; dissociation D) insolation; radiative cooling
Ecological Restoration
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Describe the roles that humus, detritus, and soil organisms play in creating a soil favorable to plants. Identify the relationships among these three factors
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Determine a representative combination of sand, silt, and clay for the following soil textures.
Using Figure 27-1, the standard soil texture triangle, answer the question. (a) Silty Clay: Sand __________%; Silt __________%; Clay __________% (b) Silty Loam: Sand __________%; Silt __________%; Clay __________% (c) Loam: Sand __________%; Silt __________%; Clay __________%