evolution and the history of life exam 1-Questions and Answers Graded A+

evolution and the history of life exam 1-Questions and Answers Graded A+ absolute dating - ANSWER--the age in years before present; given as a number relative date - ANSWER--the age in terms of the order of events in earth's history; given as a name of the time interval Nicolas Steno what does his principle tell you? - ANSWER--17th century, Florence, Italy -created "steno's principles" which is the basic principles of the science of stratigraphy -principle tells us how to order the layers of rocks which contain fossils principle of original horizontality - ANSWER--all strata (bedded rock) are deposited in a nearly horizontal orientation -if strata is dipping then tilting must have taken place, however there are exceptions: wind-blown sand dunes and flanking beds of reefs principle of superposition - ANSWER--the oldest beds are at the bottom and higher beds are progressively younger -also gives the relative age of fossils units of time - ANSWER--time-rock unit: chronostragraphic unit, all strata in the world deposited during a particular, Erathem, system, series, or stage -time unit: geochronogic unit: interval during which a time-rock unit is formed, eras, period, epoch, and age -boundary stratotype: boundary between two systems, series, or stages formally defined at a single locality paleozoic era, mesozic era, cenozoic era - ANSWER--oldest: --paleozoic era contains (youngest to oldest): ---permian, carboniferous, bevonian, silurian, ordovician, cambrian, precambrian middle: --Mesozic era contians (youngest to oldest): ---cretaceous, jurassic, triassic -youngest: --cenozoic era contians (youngest to oldest): ---Quaterny, neogene, paleogene Christian John Doppler - ANSWER--Doppler effect: sound wavelengths changes when the object passes you , EX) race car -shorter wavelength= higher pitch -longer wavelength= lower pitch