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Question 1(1 point)Which of the following is NOT useful in identifying mountain belts that have eroded away and therefore do not have obvious topographic features?Question 1 options:folds and faultsunconformitiescoesite, a variety of quartzforeland sedimentary basinsbasement upliftsSaveQuestion 2(1 point)Identify the FALSE statement. There is very little rock record for Earth’s first 400 million years becauseQuestion 2 options:nearly all rock older than 3.6 Ga has been destroyed by erosion or metamorphised.the surface was one vast ocean of hot water.intense meteorite bombardment may have destroyed land surfaces & exposed rock.surface rock was so hot that the radiometric clock were not working to record time.Save
Question 3(1 point)Which geologic time interval saw the first continents, the first life, and possibly the first plates?Question 3 options:HadeanPhanerozoicPaleozoicProterozoicArcheanSaveQuestion 4(1 point)Which of the following are fossil plants?Question 4 options:trilobitesbolidespterosaurs and plesiosaursgymnosperms and angiospermsgraptolites and archeocyathids
SaveQuestion 5(1 point)Which of the following has nothing to do with the K-T (Cretaceous-Tertiary) boundary?Question 5 options:iridiumshocked quartzChicxulubbolide (meteorite)banded-iron formationsSaveQuestion 6(1 point)The Great Oxygenation Event, which added abundant oxygen to the atmosphere beginning about 2.4 Ga, was due to theQuestion 6 options:evolution of multicellular organisms.evolution of photosynthetic organisms.appearance of photosynthetic plants on land.
None of the possible answers is correct.greater abundance and variety of Edicaran fauna.SaveQuestion 7(1 point)Which of the following was NOT a component of Earth’s Hadean atmosphere?Question 7 options:oxygenmethaneammonianitrogenhydrogenSaveQuestion 8(1 point)Identify the FALSE statement. During the Pleistocene Ice AgeQuestion 8 options:continental glaciers in the Northern Hemisphere advanced and retreated at least twenty times.sea level fell because water was tied up as ice.
the continental shelf west of Alaska was exposed, and allowed migration of animals and people from Asia to North America.the Bering Strait served as a land bridge joining Asia and North America and a partial land bridge connected Asia to Australia.continental glaciers covered all of North America.SaveQuestion 9(1 point)Geologists believe that the impact of a 13-km-wide meteorite 65 million years agoQuestion 9 options:generated a hot-air blast and blaze that caused worldwide forest fires.generated 2-km-high tsunamis.All the possible answers are correct.ejected chemicals into the atmosphere that produced acid rain.