dating to accurately determine the age of objects and how relative dating is used to generally determine use this data to develop an idea of the . Geologists use two basic types of dating: absolute dating and relative dating. Activity. Geo-Sleuth Murder Mystery. To get students familiar with the idea that geology is . the relative abundance of radioactive atoms Fact: Carbon is the most well known radiometric dating technique, but it can only be used to. Key idea 1, 2 and 3. Scientific Analysis: Relative and Absolute Age Dating. Activity: To start, place all your activity pieces with U facing up. First 2- Minute.
Changing Views of the History of the Earth. Richard Harter, Talk Origins Archive.
Summary of the history of human perception of geologic time from Genesis in the Bible to modern scientific interpretations. Includes a chronology of significant writings from to Age of the Earth. Offers scientific explanations and rebuttals to common criticisms of radiometric dating by non-scientists Foundational methods--Dating methods. National Museum Smithsonian Institution.
Provides brief overview of 1 relative dating and stratigraphic methods, 2 absolute dating and radiometric dating, including a table with parent to daughter isotopes and half lives of those isotopes commonly used in radiometric dating, 3 paleomagnetics and 4 geologic time.
Pamela Gore, Georgia Perimeter College. Short discussion of radioactive dating and stratigraphic principles. Includes tables of common radioactive parent isotopes and their stable daughter products, and half lives of common radioactive isotopes.
Geologic timeU. This online version of their informative booklet contains short, content explanations about relative time, major geologic time divisions, index fossils for use in age dating, radiometric dating and the age of the earth. Content information about absolute and relative dating methods used by the U.
Geological Survey Radiometric datingWikipedia. Jurassic Park You might want to show the film as a nice break from the usual routine. These questions are courtesy of Stephen Dilks, another earth science teacher in my building. Wonderful review of many of the concepts we've been covering in our Geology Unit.Relative/Absolute Dating
You'll want to cover methods used by scientists to measure absolute time. This is a worksheet covering concepts from our textbook. This is a worksheet from Glencoe that also covers this topic. This Glencoe site has great stuff. Worth a bit of a "surf" around their site for good material!
Click here for Absolute Time Fact Sheet. Gets the job done.
Half-Life Lab Here is a good version of a half-life lab using pennies in shoe boxes. If you make up seven boxes for seven lab groups, you'll need seven dollars in pennies. This is such a common standardized test subject, so it's worth covering well. Half-Life Calculations You'd probably better cover simple calculations of half-life. Click here for a lesson on how to teach your students to calculate half-life using a simple table. Hand this form out to your students along with the matching half-life worksheet.
Half-Life Skit Have the entire class stand up in the center of the room, all huddled together. Then touch the shoulders of students and have them step out of the "huddle" and stand around the outside of the room.
Eliminate half at a time. As each "half-life" is completed, pause and ask them what just happened.
You can either tell them what you are doing. How many half-lives to completely "decay" our class? If one half-life takes about 1 minute, how "old" is the class? Geologic Timelines Once you've taught all the basics, a timeline exercise is a nice change of pace. Usually takes one or two class periods. We assign either the Missouri timeline or Earth timeline to various pairs of students. The Earth timeline is 5 meters long and a bit more difficult. The Missouri is two meters.
I usually don't do more than a couple of the five meter timelines per class.
Teaching Geologic History
We have the students make the timelines and then answer the Timeline Comparison Questions. It might be worth the trouble for you to make up one similar to my Missouri version for your own state's geologic history.
Click here for a Timeline Scoring Guide. Geologic Timescale Worksheet Good worksheet to assign when the Timelines are finished. Geologic Eras Team Game Click here for the game pieces.
Run off on colored paper and cut out. I cut out the Eras and the characteristics separately, then have teams assemble them in order with corresponding characteristics. I also have sketches copyrighted that I also run off as game pieces.