Teaching about absolute dating


04-Dec-2019 13:13

The teacher should begin by giving students the "It's All Absolutely Relative" handout (see attachments). The students will begin by ordering the events of their morning in sequential order (first, second, third, etc.). Next, the students will develop a "working definition" of the terms If students are struggling, the teacher can provide a hint: Putting the events in sequential order (first, second, third, etc.) is an example of relative dating while defining each event with an exact time is an example of absolute dating.Then students will order the same events using exact times (ex. Note: The teacher may wish for students to work with a partner to write a "working definition" of each term. After the students have written their definitions of the terms, the teacher should provide the scientific definitions of the terms and have students write them on their handout. For the next portion of the lesson, students should be divided into groups of four to five students each. The teacher should give each group a copy of "Geologic Events-Life Forms Cards" (see attachments).Summative Assessment The teacher should formally assess student's reflection questions completed in the of the lesson.Students' answers to these questions should demonstrate the student's knowledge of relative and absolute age, as well as an understanding of the geologic time scale model created in the Teachers could identify students who require acceleration opportunities and appoint these students as group leaders for the collaborative timeline activity.The students will need a Geologic Time Scale, such as this "Geologic Time Scale" from University of California Museum of Paleontology at Berkeley, to answer some of the questions.The teacher should discuss student's placement of each organism on the timeline to ensure students understand the difference between relative and absolute age.

During the first billion years of Earth's geologic history, no life existed on Earth.Curricular Concept: Students will construct models to demonstrate the relative size and distances from the sun for each of the 8 planets in the solar system.Next, students will work with collaborative groups to order events in Earth's geologic history by relative age, then order those same events by absolute age in a scaled model timeline.For example, about 1.5 percent of a quantity of Uranium 238 will decay to lead every 100 million years.

By measuring the ratio of lead to uranium in a rock sample, its age can be determined.

Each area below is a direct link to general teaching strategies/classroom accommodations for students with identified learning and/or behavior problems such as: reading or math performance below grade level; test or classroom assignments/quizzes at a failing level; failure to complete assignments independently; difficulty with short-term memory, abstract concepts, staying on task, or following directions; poor peer interaction or temper tantrums, and other learning or behavior problems.



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