1. As a mass of air rises up a mountain side it cools and precipitation takes pl
ID: 291591 • Letter: 1
Question
1.
As a mass of air rises up a mountain side it cools and precipitation takes place. It then moves over the top of the mountain and heads downward. When it reaches the valley floor it is drier and actually warmer than when it started. What one word (listed below) captures the essence of the answer to this conundrum?
evaporation
sublimation
condensation
radiation
2.
Eventually, large alluvial fans begin to merge at the base of a desert mountain. This broad apron of alluvium is called a...
sedimentary wedge
bajada
fanglomerate
fanjita
3.
The sand at White Sands National Monument in New Mexico consists almost entirely of gypsum. The source of this unique sand is Lake Lucero (a playa). Where did this playa get all of its gypsum?
Volcanic emissions rich in calcium and sulfur, bubbled up beneath the lake to enrich it in gypsum.
It blew in from the Death Valley area.
It came from gypsum deposits in the nearby mountains.
It was created in the lake by the sulfur producing bacteria acting on limestone
Explanation / Answer
1) condensation
condensation is the change of water from gaseous form to liquid form. it occurs in the atmosphere when the warm air rises and cools as it go higher and loose the ability to hold water and condense to form water droplets and leads to precipitation.
2) Bajada
bajada is the broad slope of debris deposited across the lower slope of mountains by the streams. this deposition is along the flat surface at the base of the mountains. bajada is usually formed by a combination of several alluvial fans.
3)It came from gypsum deposits in the nearby mountains.
during the ancient time gypsum was deposited on the sea floor and later the tectonic activities takenplace and this collision of plates resulted in the formation of mountains, this period lifted up the gypsum rich sea floor to the mountains. now rain and snow melting water carry the gypsum to the Lake Lucero.
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