Final Exam - Earth Systems - Second Semester

What is fossil? - Answer-Remains of an ancient organism or its activity What kinds of rocks are fossils found in? - Answer-Sedimentary rocks What help determine the absolute and relative ages of rocks? - Answer-Fossils What provides clues to past geologic events, climates, and evolution of living things? - Answer-Fossils What are an indicator of an area's ancient environmental conditions and climates? - Answer-Fossils Why do fossils not form in igneous rocks? - Answer-Igneous rocks are too hot. Why do fossils not form in metamorphic rocks? - Answer-Metamorphic rocks require too much heat and pressure to have fossils. Name some kinds of Trace Fossils. - Answer-Trace fossils include Tracks, Trails, Footprints, Burrows, and Borings True or False: Most multicellular life appeared less than 500 million years ago. - Answer-TRUE! Most multicellular life appeared less than 500 million years ago. What are the best indicators of an area's ancient conditions and climate? - Answer-TYPE and DISTRIBUTION of FOSSILS are the BEST indicators of an area's ancient conditions and climate. What is the Law of Superposition? - Answer-In an undisturbed rock column, the oldest rocks will be on the bottom and the youngest ones on top. True or False: Fossils provide important geologic information by revealing only the absolute age of rocks. - Answer-FALSE! Fossils provide important geologic information by revealing BOTH the absolute and relative ages of rocks. What are the beginnings and endings of Geologic eras defined by? - Answer-Beginnings and ends of Geologic eras are defined by major changes in life forms based on fossi