Dating the fossil record activity

INTRODUCTION

By analyzing where these fossils are found inside the Earth, scientists can understand more about when and where different species lived. Geologists use two methods to determine the age of rocks and fossils found inside the Earth.

Relative age dating allows scientists to determine when various events occurred in relation to one another. This method helps scientist put the events into a sequential order, from first to last or oldest to youngest. It can be applied to different layers of rock found beneath the surface of the Earth or to fossils found within those layers.


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  • Dating the Fossil Record :: Mr. Altenberg :: Washington Middle School?

Geologists use the Law of Superposition to help them find the relative age of rocks and fossils. This law states that sedimentary layers are deposited sequentially, with younger layers forming over top of older ones. This means that the deeper geologists dig, the further back in time they are able to see. As shown in Figure 1, scientists can use the law of superposition to determine which species are older and which are younger based on the rock layers in which they are found. Absolute dating is a process which allows scientists to determine a numeric Figure 1: The Law of Superposition can be used to age of something based on its physical or chemical properties.

Dating Fossil Record Activity Post

One common date fossils depending on the layers in which they are found. This method can give scientists an approximate time-frame in which the rock layer might have formed or the animal might have lived. When these methods are combined, scientists can gain a more accurate picture of how events of the past unfolded, whether it be the climate or landscape in a certain area, geologic events such as earthquakes, volcanic eruptions, or floods, or whether certain species lived together at the same time.

You have received nine rock samples from a paleontologist in California. Your job is to arrange the samples in order from oldest to youngest according to their fossil content and to determine their relative ages using the process of relative dating. Results from absolute dating methods will not be available from a laboratory for several weeks, and the paleontologist needs the information immediately.

Carl Kerby on the fossil record and radiometric dating

You know from previous work that the rocks of Sample 2 are the oldest. What is the relative age of the rock samples and the fossils within them? What is the age range of each fossil species? Arrange the fossil cards from oldest to youngest. Begin with Sample 2 because you know this sample is the oldest.

18: Lab: Dating the Fossil Record

You may need to try several different arrangements to get the cards in order. Also, filling in each type of fossil with a different color may help you see patterns. In the data table, record the samples in order from bottom to top oldest to youngest in the first column.

Since you have already determined the relative ages of the fossils, you can match the radioisotope dating of the samples with the samples in your table above. Arrange the radioisotope ages from oldest bottom to youngest top in the Age of sample column. The ages of the samples determined by the geology lab are as follows: Dating the Fossil Record 1.

Dating The Fossil Record Activity

Was the dating done by the geology laboratory a direct or indirect dating of the samples? What information can relative dating provide scientists about the fossil organisms?


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  • Textbook Activity!

Using the relative dating and the radioisotope dating, determine an age range for each organism. Fossil Analysis Chart - Sterlingmontessoriscience. Final Assignment Part 1. Dating The Fossil Record Activity.

WHO'S ON FIRST? RELATIVE DATING (Student Activity)

Dating the Fossil Record. Diversity of species occurs through gradual. Dating Fossil Record Activity Post.