# Density of the Earth - How to Solve It

**This activity was selected for the On the Cutting Edge Reviewed Teaching Collection**

This activity has received positive reviews in a peer review process involving five review categories. The five categories included in the process are

- Scientific Accuracy
- Alignment of Learning Goals, Activities, and Assessments
- Pedagogic Effectiveness
- Robustness (usability and dependability of all components)
- Completeness of the ActivitySheet web page

For more information about the peer review process itself, please see http://serc.carleton.edu/NAGTWorkshops/review.html.

This page first made public: Sep 5, 2006

#### Summary

*How to Solve It*in 1957: 1) Understanding the problem, 2) Devising a plan, 3) Carrying out the plan, and 4) Looking back. This module is the first in a series of six that examine the density of planets and rocks.

## Learning Goals

- Instruct students in the four steps of Polya's problems solving strategy.
- Use Polya's four steps to solve the question of what the density of the Earth is.

## Context for Use

## Teaching Notes and Tips

These modules were developed as essentially self-paced, take-home lab assignments. Students are supposed to work through the modules, slide by slide, building their own worksheets as they go along, taking note of instructions and prompts, hints, and queries.

Students must have access to compters equiped with a spreadsheet program such as Excel.

## Teaching Materials

This module is one of several developed by Dr. Vacher. The module presentation can be found at http://www.evergreen.edu/washcenter/modules/moduleList.asp

The Powerpoint file is considered to be the student version. There is also an instructor's version that has active spreadsheets in it. There are instructions for requesting this version on the website.

## Assessment

## References and Resources

## Controlled Vocabulary Terms

**Subject**: Geoscience:Geology:Mineralogy:Physical Properties, Mathematics, Geoscience:Geology:Geophysics

**Resource Type**: Activities:Lab Activity

**Special Interest**: Quantitative

**Grade Level**: College Upper (15-16), College Lower (13-14)

**Quantitative Skills**: Graphs, Problem Solving, Scientific Notation, Units and Unit Conversions, Geometry and Trigonometry

**Ready for Use**: Ready to Use

**Theme**: Teach the Earth:Course Topics:Mineralogy, Geophysics

**Topics**: Solid Earth