If you make up seven boxes for seven lab groups, you'll need seven dollars in pennies. During each trial, students record the number of radioactive parent isotopes and record this in a data table. This is a worksheet covering concepts from our textbook.

## Faculty Websites

Students will understand how scientists use half-lives to date the age of rocks. Students will be able to explain what a half-life of a rock is. This Glencoe site has great stuff.

Click here for a lesson on how to teach your students to calculate half-life using a simple table. This student-centered station lab is set up so students can begin to explore geologic time scale. Parent isotopes are represented by the M side up radioactive. Each of the stations is differentiated to challenge students using a different learning style.

## Official Website

Click here for a Timeline Scoring Guide. You might want to show the film as a nice break from the usual routine. Have the other students guess which Era is being dramatized. All mine are copyrighted worksheets so none are included here. Students will be instructed to complete a few tasks and record answers on their lab sheets.

This activity would also be easy to adapt when talking about half-lives within a chemistry course. We use teacher-made Fossil Identification Booklets but I don't have a pdf version of them. You'll want to teach how to sequence rock layers during this unit. By having several predetermined stopping points, I am able to give students time to interact with all these new concepts, and turn the presentation into a more interactive learning experience. Click here for my version.

- If you can think of a way to separate the concept of radioactive decay from the terminology to begin with, you may see better results.
- This quick assessment allows me to verify student understanding of the concept of superposition.
- Briefly, describe the geologic time scale.

## Context for Use

Click here for the first game and click here for the second game. Daughter isotopes are represented by the M side down stable. In my class, we used people age as an example. Once you've taught all the basics, biloxi speed a timeline exercise is a nice change of pace.

You'll want to cover methods used by scientists to measure *absolute* time. **This lesson introduces absolute dating and a few ways in which scientists accomplish it.** Students will read about relative and absolute dating, as well as superposition. Which law of relative dating is the student referring to? Once you get through the concepts of radiometric dating, there are a few practice problems in the powerpoint you should go through as a class.

Throughout the presentation, there are several opportunities for the students to Think-Pair-Share answers to the embedded questions. The questions are set up in a standardized format with multiple choice answers. Once all groups data is on the table, you can calculate the average for each run and determine a class average. Class Activity The teacher can model this activity first. Usually takes one or two class periods.

- Public Information Logo and Guidelines.
- Good way to review the main geological and biological characteristics of the Eras.
- The students should know how absolute dating differs from relative dating, and should have some perspective on why absolute dating is important in dating the earth.

## Fossils and Geologic Time - 8th Grade Earth Science

Basic understanding of how radiometric dating works is useful. Cut off feet of receipt tape. The teacher will help to clear up any misconceptions about the geologic time scale.

During the explanation piece, the teacher will be clearing up any misconceptions about geologic time scale with an interactive PowerPoint, anchor charts, and interactive notebook activities. The geologic time scale lesson includes a PowerPoint with activities scattered throughout to keep the students engaged. Use mathematical reasoning to communicate information. Click here for the game pieces. These will help the students with their activity.

The idea of radioactive dating can be broken down into a relatively simple concept of half-lives that the students should be able to grasp. In this activity, students gain a better understanding of radioactive dating and half-lives. This is such a common standardized test subject, so it's worth covering well. Once this info is calculated, students create a graph comparing the class average of parent isotopes to the number of half-lives.

## Radioactive Dating Game

New information needed to be introduced with parent and daughter isotopes. They have to put the sketches in order and put a sticky label with each sketch explaining what cause the change in each sketch. We have the students make the timelines and then answer the Timeline Comparison Questions. In my class, terminology was the most difficult part i. Know and explain science information specified for their grade level.

Earth Science textbooks usually contain exercises covering this topic also. Once this is done, phrases for students have some post questions they are given that they should record in their science notebook. Watch a quick video of the students working through both card activities.

Here are a couple of good sequencing games. Students will be able to infer the relative age of rocks and fossils from index fossils and the ordering of the rock layers. Do not claim these lessons as your own work. Here is a good version of a half-life lab using pennies in shoe boxes.

## Relative Age of Fossils Eighth 8th Grade Science Standards at I4C

Gets them up and moving and thinking as a team! Introduction to Change Over Time. The following post will walk you through each of the steps and activities from the geologic time scale lesson plan. The Teaching Geologic History Packet is now available.