Paleontology and Geologic Time Scale Review
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Paleontology and Geologic Time Scale Review

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Questions and Answers

What is the term for molten rock that forms underneath the earth's surface?

  • Magma (correct)
  • Tephra
  • Lava
  • Pahoehoe
  • What is the term used for the smooth lava flows sometimes resembling twisted ropes?

  • Pyroduct
  • Tephra
  • Volatiles
  • Pahoehoe (correct)
  • Which volcanic feature accumulates material but is not part of the central vent of a volcano?

  • Nuée ardentes
  • Pyroduct
  • Parasitic cone (correct)
  • Stratovolcano
  • Which term refers to the eruption of molten rock from inside the Earth to the surface?

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

    What type of mass movement involves the gradual downhill movement of soil and regolith?

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

    What is a synonym for glowing avalanches consisting of hot gases with ash and lava fragments?

    <p>Nuée ardentes</p> Signup and view all the answers

    Which era is known as the age of dinosaurs?

    <p>Jurassic Era</p> Signup and view all the answers

    What is the outermost layer of the atmosphere called?

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

    Where does most meteors entering Earth burn?

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

    What is the study of fossils of ancient life forms and their evolution called?

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

    In which layer of the atmosphere do all weather events take place?

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

    What type of rock is Scorio based on the text?

    <p>Intrusive Igneous Rock</p> Signup and view all the answers

    What is the driving force of mass movements?

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

    What is the event that initiates downslope movement?

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

    Which type of mass movement refers to rapid soil and regolith with high water content?

    <p>Debris flow</p> Signup and view all the answers

    What occurs when soil is saturated with water and flows downslope slowly at a rate of a few millimeters or centimeters per day or year?

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

    What refers to permanently frozen ground that forms in areas where deep thawing is prevented year-round?

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

    What part of the hydrologic cycle involves excess rainfall flowing over the surface into lakes and streams?

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

    Which type of flow is characterized by a straight-line path parallel to the stream channel?

    <p>Laminar Flow</p> Signup and view all the answers

    What is the maximum load of solid particles a stream can transport per unit time called?

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

    Which term refers to a measure of a stream's ability to transport particles based on size rather than quantity?

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

    What type of flow occurs whenever a stream slows down, causing a reduction in competence?

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

    Which geological feature is characterized by icicle-like pendants hanging from cave ceilings?

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

    What hard mineral, close to talc, can be scratched by a fingernail?

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

    Study Notes

    Mass Movements

    • Gravity is the driving force of mass movements
    • Trigger: the event that initiates downslope movement
    • Liquefaction: occurs when an intense earthquake/ground shaking causes water-saturated materials to lose their strength
    • Slump: the downward sliding of a mass of rock or unconsolidated material moving as a unit along a curved surface
    • Debris flow: a rapid mass movement of soil and regolith with large water content, often referred to as mudflows in fine-grained materials
    • Lahars: debris flows from volcanic materials on volcano flanks, originating in Indonesia
    • Solifluction: occurs when soil is saturated with water, the soggy mass may flow downslope at a rate of a few millimeters or a few centimeters per day or per year

    Hydrologic Cycle

    • The hydrologic cycle is a gigantic, worldwide system powered by energy from the Sun
    • Precipitation: falls into the ocean, has completed its cycle and is ready to begin another
    • Infiltration: portion of water that soaks into the ground
    • Runoff: surplus water flows over the surface into lakes and streams
    • Transpiration: some of the water that soaks into the ground is absorbed by plants, which then release it into the atmosphere

    Volcanology

    • Magma: molten rock that forms underneath the earth's surface
    • Effusive eruption: refer to quiescent eruption, pouring out
    • PAHOEHOE LAVA FLOWS: smooth surfaces that sometimes twisted braids of ropes
    • Pyroduct: other term for lava tubes
    • Volatiles: dissolved gases
    • Tephra: other term for pyroclastic materials
    • Parasitic cone: the cone-shaped accumulation of volcanic material not part of the central vent of a volcano
    • Mauna Loa: earth's largest shield volcano
    • Stratovolcano: other term for composite volcano
    • Nuéeardentes: other term for glowing avalanches, consist of hot gases infused with incandescent ash and larger lava fragments
    • Volcanism: is the eruption of molten rock from inside the Earth to the surface

    Geologic Time Scale

    • Pre-Cambrian Era
    • Mesozoic Era: divided into three periods (Triassic, Jurassic, Cretaceous)
    • Cenozoic Era
    • Quaternary period: latest period
    • 4.6 Billion yrs old: believed to be the actual age of the Earth
    • Carboniferous: divided into Pennsylvanian and Mississippian

    Spheres of Earth

    • Lithosphere/Geosphere
    • Atmosphere
    • Hydrosphere
    • Biosphere

    Layers of the Atmosphere

    • Troposphere: the lowest layer, all weather takes place (9km to 17km)
    • Stratosphere: contains ozone layer, limit of jets and weather
    • Mesosphere: most meteors entering earth burns here
    • Thermosphere: ISS orbits the earth
    • Exosphere: the outermost layer of the atmosphere
    • Ionosphere: this layer is home to many satellites, plays a role in everyday communication and navigation

    Paleontology

    • Study of fossils of ancient life forms and their evolution
    • Catastrophism: given a new prestige by Georges Cuvier based on paleontological evidence in the Paris Basin

    Rocks Cycle

    • Scorio: an intrusive igneous rock
    • Pumice: an extrusive igneous rock

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    Test your knowledge of paleontology, the study of fossils and ancient life forms, along with the Geologic Time Scale. Learn about the ages of dinosaurs, the Quaternary period, and more!

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