GGR 101 Final Assessment with 100% correct solutions 2024

Geologic Time Scale correct answersthe "calendar" for events in Earth history. It subdivides all time into named units of abstract time called—in descending order of duration— eons, eras, periods, epochs, and ages. ● Thanks to the work of early geologists like Steno, Arduino, and Smith, modern scientists have used these and other clues to create what we now call the Geologic Time Scale,or GTS. ● The GTS has been reworked many times to reflect the latest knowledge of Earth's history. ● And today, it's organized into five subgroups: Eons, Eras, Periods, Epochs and Ages. Stratigraphy correct answersThe enumeration of those geologic time units is based on stratigraphy, which is the correlation and classification of rock strata. Video Notes on Geological Timescale correct answersTurn to rocks. So, to help us comprehend the full expanse of time, These key events -- of new life and sudden death -- frame the chapters in the story of life on earth. And the system we use to bind all these chapters together is the Geologic Time Scale. Nicolas Steno correct answersBut in 1669, Danish scientist Nicolas Steno published the first laws of stratigraphy -- the science of interpreting the strata, or layers of rock, in Earth's outer surface. Steno argued that the layers closer to the surface must be younger than the layers below them. So the farther down you dig, he thought, the older the fossils are that you find there. Giovanni Arduino; Layers correct answersbegan naming the layers of rock. In the 1760s, Arduino studied the Italian Alps, organizing their layers based on their depth and composition. The lowest layers of metamorphic and volcanic rocks, he called the Primary layer. Above those were hard sedimentary rocks which he called Secondary. And the top layers of softer alluvial deposits he named Tertiary and Quaternary. No universal Time Scale correct answers● But, because rock layers don't appear in this same order all over the world, there was no way for geologists to compare rocks from one location to another. ● Without a way to compare strata, there could be no universal time scale. William Smith; Fossils correct answersfigured out the solution