Physical Geography Exam 3 Summary
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Questions and Answers

What is fluvial geomorphology primarily concerned with?

  • The study of glacial movements
  • How rivers and streams interact with their environment (correct)
  • Ocean currents and tides
  • The formation of mountain ranges
  • Which of the following is NOT a method of erosion experienced by streams?

  • Solution
  • Abrasion
  • Hydraulic action
  • Glacial flow (correct)
  • What is the term for the study of the physical features of the Earth and their relation to geological structures?

  • Geomorphology (correct)
  • Hydrology
  • Volcanology
  • Climatology
  • An alluvial fan is typically formed at the base of which geographical feature?

    <p>Mountain or steep slope</p> Signup and view all the answers

    Which of the following describes a landform with high relief?

    <p>A mountain range</p> Signup and view all the answers

    What geological activity involves the melting, movement, and cooling of molten rock?

    <p>Igneous process</p> Signup and view all the answers

    What characterizes a braided stream?

    <p>Multiple interwoven channels</p> Signup and view all the answers

    Which type of weathering involves the physical breaking down of rocks?

    <p>Mechanical weathering</p> Signup and view all the answers

    In glaciology, what is the core of ablation?

    <p>The lower part where ice loss occurs</p> Signup and view all the answers

    What phenomenon occurs when large rock masses expand and break apart due to pressure changes?

    <p>Unloading weathering</p> Signup and view all the answers

    Which type of glacier is found in mountainous regions?

    <p>Alpine glacier</p> Signup and view all the answers

    What happens when ice accumulation exceeds ablation?

    <p>The glacier expands</p> Signup and view all the answers

    What factor enhances surface runoff in a landscape?

    <p>Steep slopes</p> Signup and view all the answers

    What causes the formation of a crevasse in a glacier?

    <p>Stress from ice movement over uneven terrain</p> Signup and view all the answers

    Which of the following describes the downward movement of rock and soil due to gravity?

    <p>Mass wasting</p> Signup and view all the answers

    Which process is characterized by water seeping into rock cracks, freezing, and widening those cracks?

    <p>Freeze-thaw weathering</p> Signup and view all the answers

    What is the primary role of sediment in fluvial geomorphology?

    <p>To shape landforms through deposition and erosion</p> Signup and view all the answers

    What defines an oxbow lake?

    <p>A crescent-shaped lake left from a meandering river</p> Signup and view all the answers

    What is an aquifer best described as?

    <p>A geological formation that stores water underground</p> Signup and view all the answers

    How are earthquakes measured?

    <p>Richter scale</p> Signup and view all the answers

    What is the main characteristic of a landform with low relief?

    <p>It is relatively flat.</p> Signup and view all the answers

    Which type of weathering involves the alteration of minerals making them chemically different?

    <p>Chemical weathering</p> Signup and view all the answers

    What is an example of mass wasting?

    <p>Soil and rock sliding down a slope</p> Signup and view all the answers

    What geological structure occurs when rock layers fold into an arch-like shape?

    <p>Anticline</p> Signup and view all the answers

    What enhances infiltration into the soil?

    <p>High soil organic matter content</p> Signup and view all the answers

    Which process involves the breaking down of rocks due to temperature changes?

    <p>Freeze-thaw weathering</p> Signup and view all the answers

    How is the rate of surface runoff related to infiltration?

    <p>They are inversely related.</p> Signup and view all the answers

    What type of geological formation stores and provides water underground?

    <p>Aquifer</p> Signup and view all the answers

    What is the term for the fracture or crack in the Earth's crust that allows for movement?

    <p>Fault</p> Signup and view all the answers

    What is the initiating cause of earthquakes?

    <p>Movement along a fault line</p> Signup and view all the answers

    What is an alluvial fan primarily characterized by?

    <p>A cone-shaped deposit of sediment</p> Signup and view all the answers

    Which process is NOT a method of stream erosion?

    <p>Thermal expansion of water</p> Signup and view all the answers

    What occurs when a river meanders and cuts off a loop?

    <p>An oxbow lake is formed</p> Signup and view all the answers

    What primarily characterizes a braided stream?

    <p>Multiple intertwining channels</p> Signup and view all the answers

    What determines the core of accumulation in a glacier?

    <p>Area with more snow accumulation than melting</p> Signup and view all the answers

    What is the primary factor that influences glacier movement?

    <p>Internal deformation and basal sliding</p> Signup and view all the answers

    Which term describes the process of sediment being deposited in a new location?

    <p>Deposition</p> Signup and view all the answers

    What happens during the ablation of a glacier?

    <p>Ice is lost through various processes</p> Signup and view all the answers

    What is the function of a crevasse in a glacier?

    <p>To allow for ice movement and stress release</p> Signup and view all the answers

    What defines a glacier as being an alpine glacier?

    <p>It forms in mountainous regions</p> Signup and view all the answers

    Which of the following statements best describes mechanical weathering?

    <p>It breaks down rocks into smaller pieces without changing their chemistry.</p> Signup and view all the answers

    Which geological feature is characterized by significant elevation changes and uneven terrain?

    <p>High relief landform</p> Signup and view all the answers

    What is the primary characteristic of unloading weathering?

    <p>Expansion and fracturing of rocks upon exposure to pressure release</p> Signup and view all the answers

    In a geographical context, what does the term 'syncline' refer to?

    <p>A downward fold in rock layers with younger rocks at the center</p> Signup and view all the answers

    Which factor most significantly increases the risk of surface runoff?

    <p>Soil compaction</p> Signup and view all the answers

    What mechanism primarily drives mass wasting events?

    <p>Force of gravity</p> Signup and view all the answers

    Which type of aquifer is primarily composed of impermeable rock layers that do not allow water to flow freely?

    <p>Confined aquifer</p> Signup and view all the answers

    Which of the following processes primarily leads to the formation of an alluvial fan?

    <p>Sediment deposition due to abrupt slope reduction</p> Signup and view all the answers

    Which weathering process involves the growth of salt crystals causing rock degradation?

    <p>Salt crystal growth</p> Signup and view all the answers

    What is the primary inverse relationship between infiltration and surface runoff indicative of?

    <p>Higher infiltration reduces the volume of runoff</p> Signup and view all the answers

    What is the main difference between an erosional landform and a depositional landform?

    <p>Erosional landforms are results of material being removed from the landscape.</p> Signup and view all the answers

    Which process is responsible for the formation of a braided stream pattern?

    <p>Variability in sediment supply and discharge.</p> Signup and view all the answers

    Which characteristic is typical of the core of ablation in a glacier?

    <p>Hight rates of ice melting and weathering.</p> Signup and view all the answers

    What is a primary cause for the formation of an alluvial fan?

    <p>Rapid changes in elevation causing sediment deposition.</p> Signup and view all the answers

    What defines the difference between internal deformation and basal sliding in glaciers?

    <p>Basal sliding relates to movement of ice over the bedrock.</p> Signup and view all the answers

    What is the significance of the concept of 'crevasse' in glaciology?

    <p>It highlights fractures that form due to ice movement and stress.</p> Signup and view all the answers

    Under what conditions would a glacier primarily experience ablation?

    <p>When it is located in a region with high summer temperatures.</p> Signup and view all the answers

    Which type of glacier is characterized by flow primarily occurring in a mountainous region?

    <p>Valley glaciers.</p> Signup and view all the answers

    What environmental change does it indicate when accumulation exceeds ablation in a glacier?

    <p>The glacier is advancing and gaining mass.</p> Signup and view all the answers

    Study Notes

    Physical Geography Exam 3 Summary

    • Geomorphology: The study of Earth's physical features and their geological structures. Topography studies Earth's surface features. Relief refers to elevation differences. Low relief is relatively flat, high relief has significant elevation changes. Relief is a key concept in evaluating topographic features.

    • Igneous Processes: Involve the melting, movement, and cooling of molten rock (magma). Syncline is a rock fold with younger layers at the center. Fault is a fracture in Earth's crust with movement. Earthquakes measure magnitude on a scale. Different igneous processes result in varied landforms.

    • Weathering: The breakdown of rocks and minerals into smaller pieces. Mechanical weathering (e.g., unloading, freeze-thaw) physically alters rocks. Chemical weathering alters rocks' chemical composition. Erosion, transportation, and deposition are processes shaping Earth's surface through these changes and moving debris to new locations. Weathering rates are affected by climate, rock type, and presence of water. Types of weathering: mechanical (e.g., unloading, freeze-thaw) and chemical.

    • Fluvial Processes (Ch 13): Rivers/streams shape landscapes by carrying rocks and soil. Relationship between infiltration and surface runoff is significant. Factors influencing infiltration include soil moisture content, good vegetation cover, gentle slopes. Factors affecting surface runoff include land contours, steep slopes, soil compaction, and poor vegetation cover. Aquifers store and provide water, holding it in porous rocks and sediment. River processes influence landscape evolution.

    • Glacial Processes (Ch 14): Fluvial Geomorphology studies how rivers shape landscapes. Erosion is the wearing away of soil, sediment, or other material. Depositional features result from sediment deposition from water, wind, or ice. Examples include alluvial fans (sediment deposits at mountain bases) and oxbow lakes (crescent-shaped lakes formed from meandering rivers). Depositional landforms are shaped by sediment.

    • Glaciers (Ch 16): Glaciers flow through two mechanisms: Internal deformation and Basal sliding. Alpine glaciers (mountain glaciers) and Ice sheets (continental glaciers). Ablation is where ice is lost, and accumulation is where snow builds up. Crevasses are deep cracks in glaciers. Moraines are ridges of rock and sediment deposited by glaciers. Glacial processes significantly impact topography. Ice movement and deposition modify the landscape. Ablation exceeds accumulation, ice retreats. Accumulation exceeds ablation, ice advances.

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    Description

    This quiz covers the key concepts of geomorphology, igneous processes, and weathering as they pertain to Earth's physical geography. Understand the significance of relief, rock folding, and the processes of erosion and fluvial systems. Prepare to explore how these elements shape our environment.

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