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Geology Exam 3 GE2000 Questions and Answers

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Geology Exam 3 GE2000 Questions and Answers Troposphere - Answer-Warmest layer, relatively unstable Stratosphere - Answer-Dry, stratified, warming due to ozone reactions Mesosphere - Answer-Coldest layer Thermosphere - Answer-Increased temperature due to interaction of ions with solar wi...

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  • August 6, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • geology exam 3 ge2000
  • geology exam 3 ge2000 questions and answers

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Geology Exam 3 GE2000 Questions
and Answers
Troposphere - Answer-Warmest layer, relatively unstable

Stratosphere - Answer-Dry, stratified, warming due to ozone reactions

Mesosphere - Answer-Coldest layer

Thermosphere - Answer-Increased temperature due to interaction of ions with solar
wind

Volcanic eruptions cause temporary cooling of climate: - Answer-- large eruptions place
ash and SO2 into the stratosphere
- SO2 chemically converts to sulfuric acid aerosol droplets that reflect solar radiation

Mud flows (Lahars) and Debris Flows - Answer-avalanches or flows of earth debris
(rocks, soil, trees, mud, sand, ash) mixed with various amounts of water

Mud flows - Answer-Volcanoes are prone to ___ because of the amount of loose,
unconsolidated material that collects on the steep flanks of volcanoes.

following topography - Answer-hazardous areas are predictable by ___ ___.

Volcanic Gases - Answer-Mostly:
-water vapor (H2O)
-carbon dioxide (CO2)
-sulfur dioxide (SO2)

Volcanic Gases are usually not a human health hazard because - Answer-gases usually
rise and gases dilute (mix with ambient air) with distance, unless it doesn't...

Controlled de-gassing of Lake Nyos - Answer-after 1986 CO2 "Eruption" from Lake
Nyos which killed 1700 people and hundreds of animals

How do we compare the size of volcanic eruptions? - Answer-Volcanic Explosive Index:
Plume Height, Volume, How often..

glacier - Answer-a large, long-lasting mass of ice formed on land, that moves downhill
under its own weight

1/10 - Answer-Glaciers currently cover about ___ of the Earth's surface

, 75% - Answer-About ___ of the world's supply of fresh water is locked up in glacial ice

Types of Glaciers - Answer-Alpine glaciation, continental glaciation, valley glacier, and
ice sheet

Alpine glaciation - Answer-found in mountainous regions

continental glaciation - Answer-exists where large part of a continent is covered by
glacial ice

valley glacier - Answer-confined to a valley and flows from a higher to a lower elevation

ice sheet - Answer-a mass of ice that is not restricted to a valley but covers a large area
of land

Formation of Glaciers - Answer-Glaciers develop as snow, is compacted to granular
snow and recrystallized, first into firn snow and then glacial ice (fine-grained ice to
coarse grained ice)

glaciers can only form - Answer-where more snow accumulates during the winter than
melts away during the spring and summer

Glacial Ice = - Answer-metamorphic "rock"

gravity - Answer-is the driving force for movement of glacial ice

weight, 60 - Answer-Ice cannot support its own ___ and yields to plastic flow. Movement
begins at a thickness of about __ meters.

Two Essential Parts to Glaciers - Answer-Zone of Accumulation and Zone of Ablation

advancing glacier - Answer-gains more snow than it loses, has a positive budget

terminus (end) of advancing glacier - Answer-advances downslope

receding glacier - Answer-negative budget

Terminus of receding glacier - Answer-shrinks back upslope

zone of accumulation - Answer-Snow is added to glacier

zone of ablation - Answer-melting and calving of icebergs

equilibrium line (firn line) - Answer-separates accumulation and ablation zones, will
advance or retreat depending on climate

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