# Age and Times of Mars vs Earth

## Summary

This learning module discusses the geologic history of the Earth, the principles scientists use to define the Earth's geologic history, and relative dating techniques.

## Learning Goals

Students will be able to:

- Use principles of relative dating to interpret block diagrams, Earth outcrops, and Mars imagery
- Compare the geologic history of Earth and Mars

Compare examples

and

## Context for Use

Make sure students have a basic understanding of lithologies in addition to the method of crater counting for dating and interpreting the ages of Martian terrain.

## Description and Teaching Materials

*Compiled In-Class Activities and Homework*

- Instructor Version (Acrobat (PDF) 1MB Nov20 16)

- Student Version (Acrobat (PDF) 780kB Nov20 16)

*In-Class Activity*

- In-Class Activity 1: A Timescale Comparison

- Student Version (Acrobat (PDF) 636kB Nov20 16); Instructor Version (Acrobat (PDF) 917kB Nov20 16)

*Homework/Lab*

- Homework 1: It's All Relative

- Student Version (Acrobat (PDF) 751kB Nov20 16); Instructor Version (Acrobat (PDF) 1MB Nov20 16)

## Teaching Notes and Tips

- Expose students to Crater Counting such that students realize the geologic timescale of Mars and dating of the Mars surface is based upon crater counting.
- For
*Homework 1*make sure students have a basic knowledge of lithology in order to interpret unconformities. - Depending on class size, if possible, make copies of the geologic maps for students to use during
*In-Class Activity 1*. If class sizes are larger than 30, include these maps in a course packet. Overhead projection of the maps may not be sufficient to engage fully in the activity. *Homework 1*can be adapted for an in-class activity as desired.

## Assessment

Methods of assessment are within each individual *In-Class Activity* and *Homework*.

## References and Resources

- Image File: Lesson 11: Instructor Version (pptx) (PowerPoint 2007 (.pptx) 389kB May28 13)
- YouTube video of the Noachian period on Mars (artist interpretation): http://www.youtube.com/watch?v=JfYIvkTQ2pc
- Simplified geologic map of the state of Utah: http://geology.utah.gov/maps/geomap/postcards/pdf/utgeo_postcd.pdf
- Geologic map of Mars: https://www.lpi.usra.edu/resources/mars_maps/1083/