Check assumptions and methods.
Calculate density, evaluate a weathering model, read missing history, plot profiles and identify sampling bias.
- 5 complete lessons
- Flexible pacing
- Print-ready student + teacher pages
Start with lesson 1 and work in order, or choose the skill your group needs. Each lesson includes instructions, an editable worksheet, an understanding check and teacher guidance. Use an adult-selected sample, supplied record or photograph as directed; no collection trip is required.
Density Is One Clue
Calculate density from supplied measurements and avoid treating a matching value as a unique ID.
50 min · student worksheet · teacher guideWeathering: Evidence and Variables
Compare model data, identify control conditions and distinguish model breakup from mineral chemistry.
55 min · student worksheet · teacher guideA Missing Chapter in the Rocks
Build a relative sequence that includes erosion and explain the uncertainty of a missing interval.
55 min · student worksheet · teacher guideFrom Map to Elevation Profile
Plot a distance-elevation profile and distinguish net rise from total ascent.
55 min · student worksheet · teacher guideWhen a Sample Misleads
Compare two sampling methods and explain how selection bias limits a population claim.
55 min · student worksheet · teacher guide