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
What is the result of decaying Uranium 235? – correct answer -Lead 207
What is the half life of Carbon 14? – correct answer -~5,730 years
What is the result of decaying Carbon 14? – correct answer -Nitrogen 14
What is absolute dating? – correct answer -i. Establishing the age of a rock or event in the past using
spontaneous radiometric decay of parent atoms to daughter atoms
What is the result of decaying Rubidium 87? – correct answer -Strontium 87
What happens when a neutron decays? – correct answer -A neutron decays, ejecting an electron and
producing a proton, which changes the atom.
What are many of the extrasolar planets known as? – correct answer -Hot Jupiter
Why are many extrasolar planets known as Hot Jupiter’s? – correct answer -Because they are Jupiter
sized planets very close in to the central star.
Why have so many hot Jupiter type of extrasolar planets been found? – correct answer -The method
used to discover extrasolar planets is most sensitive to heavy planets close in to the central star<\/p>\n\n\n\n