In order to do so we will have to understand the following: To better understand these concepts, let's look at an archeological example: Imagine we are a group of archeologists studying two different trash pits recently discovered on the Tulane University campus and at the Audubon Zoo (where they all aksed for you).By carefully digging, we have found that each trash pit shows a sequence of layers.Scientific detective work and modern radiometric technology have only recently unlocked the clues that reveal the ancient age of our planet.This image from Lake Mead NRA shows a sequence of sedimentary rock layers. Selector .selector_input_interaction .selector_input. Selector .selector_input_interaction .selector_spinner. From the beginning of this course, we have stated that the Earth is about 4.6 billion years old.2) To familiarize students with the concept of half-life in radioactive decay.
Some very straightforward principles are used to determine the age of fossils.
It is estimated to require four hours of class time, including approximately one hour total of occasional instruction and explanation from the teacher and two hours of group (team) and individual activities by the students, plus one hour of discussion among students within the working groups.
Explore this link for additional information on the topics covered in this lesson: This activity will help students to have a better understanding of the basic principles used to determine the age of rocks and fossils. Objectives of this activity are: 1) To have students determine relative age of a geologically complex area.
Archbishop James Ussher of Armagh, Ireland, 1654, added up generations from the Old Testament and determined that Earth formed on October 23, 4004 BCE.
The goal of this lecture is come to come to a scientific understanding of geologic time and the age of the Earth.
It wasn't until well into the 20th century that enough information had accumulated about the rate of radioactive decay that the age of rocks and fossils in number of years could be determined through radiometric age dating.