Podcast
Questions and Answers
Which of the following deserts is characterized by high atmospheric pressures?
Which of the following deserts is characterized by high atmospheric pressures?
- Gobi Desert in China and Mongolia
- Atacama Desert in Chile
- Desert valleys of the Great Basin, U.S.
- Sahara Desert in Northern Africa (correct)
What is the most likely origin of loess deposits in the central United States?
What is the most likely origin of loess deposits in the central United States?
- Originally deposited barchanoid dunes, later redeposited by glaciers
- Rock flour from Pleistocene glacial streams and rivers
- Windblown from dry areas in the Great Plains and southwestern desert areas (correct)
- Accumulation from flooding of the Mississippi River
In which environment would surface water be most effective in infiltrating into the local groundwater system?
In which environment would surface water be most effective in infiltrating into the local groundwater system?
- Streams flowing in the numerous channels of an alluvial fan (correct)
- A stream in a steep-sided bedrock canyon in the mountains
- A playa lake with a thick mud bottom
- All of the above would promote infiltration.
What is the term for a mature desert landscape feature consisting of coalesced alluvial fans?
What is the term for a mature desert landscape feature consisting of coalesced alluvial fans?
Which of the following describes the climate factors that cause low-latitude deserts like the Sahara in Africa?
Which of the following describes the climate factors that cause low-latitude deserts like the Sahara in Africa?
Which statement accurately describes desert environments?
Which statement accurately describes desert environments?
Which type of land has rainfall amounts and soil moisture contents between those of true deserts and humid lands?
Which type of land has rainfall amounts and soil moisture contents between those of true deserts and humid lands?
What is the name for an intermittent stream channel in the dry land areas of the Western United States?
What is the name for an intermittent stream channel in the dry land areas of the Western United States?
Where has desertification been particularly well-documented over the past 50 years?
Where has desertification been particularly well-documented over the past 50 years?
Which type of coastline typically showcases wave-cut cliffs, sea stacks, sea arches, and wave-cut platforms?
Which type of coastline typically showcases wave-cut cliffs, sea stacks, sea arches, and wave-cut platforms?
Emergent coastlines, such as those in Scandinavia and the Hudson Bay region, result from which of the following conditions?
Emergent coastlines, such as those in Scandinavia and the Hudson Bay region, result from which of the following conditions?
Increasing quantities of which gas will eventually produce global warming?
Increasing quantities of which gas will eventually produce global warming?
What primarily causes water movement and sand transport that runs parallel to the beach?
What primarily causes water movement and sand transport that runs parallel to the beach?
What type of currents move sand and water parallel to the beach?
What type of currents move sand and water parallel to the beach?
Which of the following is an artificial coastal feature?
Which of the following is an artificial coastal feature?
Under what condition does a deep-water wave become shallow water wave?
Under what condition does a deep-water wave become shallow water wave?
Which feature is an isolated remnant of bedrock standing above a wave-cut platform?
Which feature is an isolated remnant of bedrock standing above a wave-cut platform?
Which of the following coastal features extends partway across the mouth of a bay or estuary?
Which of the following coastal features extends partway across the mouth of a bay or estuary?
Which statement best describes the trend of sea level change?
Which statement best describes the trend of sea level change?
Which of the following best describes "swash and backwash"?
Which of the following best describes "swash and backwash"?
Flashcards
Sahara Desert Characteristics
Sahara Desert Characteristics
Low-latitude desert with high atmospheric pressure and descending air masses.
Loess Deposits Origin
Loess Deposits Origin
Originated as rock flour in Pleistocene glacial streams and rivers.
Effective Water Infiltration
Effective Water Infiltration
Streams flowing in the numerous channels of an alluvial fan.
Bajada
Bajada
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Climate factors causing low latitude deserts
Climate factors causing low latitude deserts
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Water in Desert Landscapes
Water in Desert Landscapes
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Steppes
Steppes
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Wash
Wash
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Documented Desertification Area
Documented Desertification Area
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Coastline prone to wave-cut cliffs, sea stacks, sea arches, and wave-cut platforms
Coastline prone to wave-cut cliffs, sea stacks, sea arches, and wave-cut platforms
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Emergent Coastlines
Emergent Coastlines
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Gases that produce global warming
Gases that produce global warming
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Cause of water movement and sand transport parallel to the beach
Cause of water movement and sand transport parallel to the beach
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Currents
Currents
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An artificial coastal feature
An artificial coastal feature
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how a deep-water wave change to a shallow water wave
how a deep-water wave change to a shallow water wave
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isolated remanant of bedrock standing above a wave-cut platform
isolated remanant of bedrock standing above a wave-cut platform
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partway across the mouth of a bay or estuary
partway across the mouth of a bay or estuary
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movements of water and sand as waves break along a beach
movements of water and sand as waves break along a beach
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Eccentricity, obliquity, and precession
Eccentricity, obliquity, and precession
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particulate matter found in the atmosphere
particulate matter found in the atmosphere
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burning the following materials contributes carbon dioxide to Earth's atmosphere?
burning the following materials contributes carbon dioxide to Earth's atmosphere?
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Study Notes
- The Sahara Desert in northern Africa is a low-latitude desert characterized by high atmospheric pressures and descending air masses.
- Loess deposits in the central United States blew in from the dry areas in the Great Plains and southwestern desert areas.
- Surface water most effectively infiltrates into the local groundwater system in streams flowing in the numerous channels of an alluvial fan.
- A bajada is a mature desert landscape feature consisting of coalesced alluvial fans.
- Climatic factors that cause low latitude deserts like the Sahara in Africa are best described as cool, dry air descending aloft, with surface winds blowing toward the equator.
- Despite infrequent rainfalls, erosional and depositional features of running water are important in desert landscapes.
- Steppes have rainfall amounts and soil moisture contents between those of true deserts and humid lands.
- A wash is an intermittent stream channel in the dry land areas of the western United States.
- Desertification has been particularly well documented over the past 50 years in the Sahel along the southern margin of the Sahara Desert.
- Coastlines with wave-cut cliffs, sea stacks, sea arches, and wave-cut platforms typically occur where bedrock is vigorously eroded as sea level rises.
- Emergent coastlines with Scandinavia and the Hudson Bay region of Canada result from a rate of glacial rebound exceeding the rate of sea level rise.
- Increasing quantities of carbon dioxide will eventually produce global warming.
- Water movement and sand transport parallel to the beach are fundamentally caused by waves impinging obliquely onto a beach.
- Longshore currents are currents that move sand and water parallel to the beach.
- A breakwater is an artificial coastal feature.
- A deep-water wave changes to a shallow water wave when the wavelength is about one-half the water depth.
- A sea stack is an isolated remnant of bedrock standing above a wave-cut platform.
- A spit extends partway across the mouth of a bay or estuary.
- Sea level has risen for the past few centuries and will continue to rise.
- Swash and backwash describe movements of water and sand as waves break along a beach.
- Eccentricity, obliquity, and precession are considered natural causes of climate change.
- Burning wood, petroleum, and coal (A, B, and C) contributes carbon dioxide to Earth's atmosphere.
- A general term for particulate matter found in the atmosphere is aerosols.
- Lines of indirect evidence that scientists use to reconstruct past climates are termed proxy data.
- Methane is produced by oxidized bacteria.
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