Fossils present in ______ layers of rock are older, according to the principle of superposition.Multiple choice question.lightersandierlowerhigher

The principle of fossil succession states thatGroup of answer choicesevery rock layer contains only one species of fossil.every fossil species spans only a limited range of rock layers, corresponding to the time period over which it lived.fossil species found in rock are the same as species living today.the same fossil assemblages appear throughout geologic time in a repeating intervals.

A geologist recorded fossil data for three different organisms found in a rock layer: ​​Fossil X: existed 510 to 250 million years ago, is found in very few locations, and has unique fossil features.Fossil Y: existed 100 to 65 million years ago, is found in many different locations, and has unique fossil features.Fossil Z: existed 400 million years ago to present day, is found in many different locations, and has similar features to other fossils.Part AWhich statement best explains which fossil the geologist should use to compare the rock layer to other layers and estimate when the layers were deposited?

Which statement explaining the age of the rock layers best supports the answer to Part A?​   ARock layers that contain fossils are always the oldest rock layers and can be used to determine the ages of rock layers above them.BGeologic events like earthquakes can erase rock layers from the geologic timescale and make it difficult to know the ages of different rock layers.COlder rock layers will always be directly below younger rock layers unless they have been disturbed by geologic activity.DRock layers that are the thickest are the oldest because they represent a longer span of time in which the rock layer was formed

Scientists can estimate the ages of rock if they contain certain __________. A. sediments B. carbons C. minerals D. index fossils

18. Which of the following come from types of organisms that lived during only a relatively short period of time and are used to determine the relative age of rocks? imprints index fossils trace fossils extrusions