# Absolute dating powerpoint middle school, radioactive dating looking at half-lives using m&ms

The Teaching Geologic History Packet is now available. Have the entire class stand up in the center of the room, nascar dating site all huddled together. Click here for the first game and click here for the second game.

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Students will be able to explain what a half-life of a rock is. New information needed to be introduced with parent and daughter isotopes. Students will be able to infer the relative age of rocks and fossils from index fossils and the ordering of the rock layers. In our class the students had just enough time to do one sample, but depending on your time frame you may have students switch samples to do more than one.

Cut off feet of receipt tape. You'd probably better cover simple calculations of half-life. Daughter isotopes are represented by the M side down stable.

Students will be examining a number models of different layers of the earth. You'll want to teach how to sequence rock layers during this unit. Good way to review the main geological and biological characteristics of the Eras. You can read more about how I set up the station labs here. Explain the difference between geological time and historical time.

At this station, students will be watching a short video explaining the laws of relative rock dating. 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. Basic understanding of how radiometric dating works is useful. Don't see the need for quiet seatwork when we could be doing something more lasting, like a game or lab or powerpoint or other more active activity. The geologic time scale lesson includes a PowerPoint with activities scattered throughout to keep the students engaged.

- Class Activity The teacher can model this activity first.
- Usually takes one or two class periods.
- This student-centered station lab is set up so students can begin to explore geologic time scale.

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. Here is a good version of a half-life lab using pennies in shoe boxes. Save yourself a ton of time and grab it now.

Tell students they will be learning about the geological timescale of the age of the Earth and how scientists determined it. Demonstrate Understanding of Science Concepts and Principles a. Once this info is calculated, students create a graph comparing the class average of parent isotopes to the number of half-lives. If you make up seven boxes for seven lab groups, you'll need seven dollars in pennies. Which statement is incorrect about the Geologic Time Scale?

## Seventh grade Lesson Relative Age of Rocks

Once all groups finish, each group records their info on the class decay table on the board and we calculate the averages of the class. Have them add up important events with pictures. Home Professional Learning. Introduction to Change Over Time. It might be worth the trouble for you to make up one similar to my Missouri version for your own state's geologic history.

Students who can answer open-ended questions about the lab truly understand the concepts that are being taught. You can either tell them what you are doing. Once this is done, students have some post questions they are given that they should record in their science notebook. In my class, terminology was the most difficult part i.

The questions are set up in a standardized format with multiple choice answers. Hand this form out to your students along with the matching half-life worksheet. Run off and cut out for the game. You might want to show the film as a nice break from the usual routine. This Glencoe site has great stuff.

## Teaching Geologic History

These will help the students with their activity. Wonderful review of many of the concepts we've been covering in our Geology Unit. The assess it station is where students will go to prove mastery over the concepts they learned in the lab. You can make your own or surf the Web for other images you could use. Do not copy and paste lessons onto your website.

Student Activity Now have the students make a timeline of their lives. Run off on colored paper and cut out. Here are a couple of good sequencing games.

## Radioactive Dating Looking at Half-Lives Using M&Ms

## Absolute dating (radiometric dating)

Click here for Absolute Time Fact Sheet. **One of the most basic concepts in teaching geologic History is distinguishing between Relative and Absolute Time.** This lesson introduces absolute dating and a few ways in which scientists accomplish it.

Powerpoint introduction is attached. What is the law of inclusion? Students will record their observations on their lab sheet. During each trial, sites students record the number of radioactive parent isotopes and record this in a data table.

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

Do not claim these lessons as your own work. Relative Aging Worksheets. We use teacher-made Fossil Identification Booklets but I don't have a pdf version of them. Contacts E-mail More Distance Education. Gets them up and moving and thinking as a team!

- Click here for the game pieces.
- Students will have a more in-depth understanding of what radioactive decay is.
- Once students are in their groups, with supplies, and general directions are given, they are on their own for doing their runs.
- Click here for my version.