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ERCS181 - Intro to Geology: WEEK 2 EXAM (timed and single access) Attempt Score: 100 / 100 - 100 % Overall Grade (highest attempt) : 100 / 100 - 100 % Question 1 4 / 4 points What possible driving force did Wegener consider? Question options: conduction in the mantle convection in the crust 4 / 4 points Ocean-to-ocean convergent boundaries are commonly associated with which landforms? Question options: volcanic arc, forearc basin broad mountain range, folds 4 / 4 points Why is oceanic crust younger than continental crust? Question options: because the continents formed so much earlier than the oceans formed convection in the mantle because oceanic crust is subducted back into the mantle while newer younger crust is being created at the Mid Oc oceanic trench, island arc
because the oceans could not form until water was created which was after continents formed
4 / 4 points Continent to continent convergent boundaries are commonly associated with which landforms? Question options: volcanic arc, forearc basin oceanic trench, island arc 4 / 4 points Which type of boundaries involve deep sea trenches, the destruction of seafloor crust, and subduction? Question options: transform boundaries divergent boundaries 4 / 4 points Most scientists of the time the idea of continental drift. Question options: were unsure about accepted 4 / 4 points Wegener named the last supercontinent. Question options: Eurasia. Laurentia. broad mountain range, folds Pangaea. convergent boundaries rejected
4 / 4 points Which characteristics describe transform boundaries? Question options: deep sea trenches, the destruction of seafloor crust, and subduction plates moving apart, the creation of new seafloor, and the Mid Ocean Ridge 4 / 4 points Which piece of evidence renewed the scientific community's interest in continental drift? Question options: how the continents fit together the presence of similar fossils on opposite sides of the oceans glacial evidence in warm climates 4 / 4 points Darwin's explanation of Evolution as the origin of species centered on what? Question options: Acquired characteristics Sexual reproduction DNA Medelian heredity 4 / 4 points Which kind of unconformity is probably the hardest to recognize among layered rocks? Question options: crust being neither created nor destroyed and shearing motion paleomagnetism Natural selection
Burrow mold Footprint Fossil poop (coprolites) 4 / 4 points Which mineral is the most commonly used for dating? Question options: Diamond Olivine Quartz Amphibole 4 / 4 points Which stratigraphic principle states the fact that sedimentary rocks are deposited in layers perpendicular to the direction of gravity? Question options: Superposition Cross-cutting relations Faunal succession Lateral continuity 4 / 4 points What are the characteristics of an index fossil? Question options: bone Zircon Original horizontality
Localized geographically and chronologically Localized geographically, chronologically widespread Widespread geographically and chronologically 4 / 4 points Which best describes half life? Question options: Half time between a decay Time for half of a single radioactive atom to decay Half of the time between a decay 4 / 4 points A fault that bisects a rock formation is younger than the rock unit according to the Principle of Question options: Lateral Continuity Original Horizontality Stratigraphy 4 / 4 points Which of these time divisions is the longest? Question options: Era Widespread geographically, chronologically limited Time for half of a radioactive sample to decay Cross-Cutting Relationships Eon
