GEO 401 Midterm 2 exam 2023 with 100% correct answers

What is the principle of superposition? - correct answer -In a sequence of undisturbed layered rocks, the oldest rocks are on the bottom. What is the principle of horizontality? - correct answer -1. Layered strata are deposited under the influence of gravity as horizontal or nearly horizontal or nearly parallel to the Earth's surface What is the principle of faunal succession? - correct answer -Sedimentary strata in an outcrop contain fossils in a definite "time" sequence. The same sequence can be found in outcrops at other locations, so that strata in one location can be matched to strata in another location. What is faunal succession? - correct answer -The stratigraphic ordering of the fossils of animal species What is angular uncomformity? - correct answer -An unconformity in which younger sediments rest upon the eroded surface of tilted or folded older rocks. What is disconformity? - correct answer -An unconformity between beds that are parallel. What is nonconformity? - correct answer -an unconformity between stratified rocks above and unstratified igneous or metamorphic rocks below What are uncomformities? - correct answer -A surface between two layers that were laid down in a broken sequence. Atomic number - correct answer -# of protons Atomic mass - correct answer -# of protons + Neutrons Isotopes - correct answer -Same # of protons, different # of neutrons What is the half life of Uranium 238? - correct answer -~4.5 billion years What is the result of decaying Uranium 238? - correct answer -Lead 206 What is the half life of Uranium 235? - correct answer -~0.7 billion years