OpenSciEd Unit 6.4 · Lesson 13
Erosion Rates vs.
Assessment guide
How to read student work on this assessment — standards alignment, what strong understanding looks like, and common gaps.
Standards alignment
What understanding looks like
Strong
- See Erosion Rates vs. Uplift Rates for guidance.
From Teacher Edition
View assessment opportunity →Facilitation guidance from the lesson plan — what to notice in student thinking and how to respond while teaching.
What to look / listen for
See Erosion Rates vs. Uplift Rates for guidance.
What to do
Depending on when in the year you teach this unit, your students may need more or less scaffolding with the mathematics used in this assessment. Unit rate and ratios are part of the Common Core State Standards for Mathematics in 6th grade. (CCSS.MATH.CONTENT.6.RP.A.3). Because the rates of change for Mt. Mitchell are per 1,000 years, students will need to do some conversions to figure out how much this mountain will be affected per year in order to be able to successfully make comparisons between Mt. Everest and Mt. Mitchell. Some students may need some scaffolding in these conversions. See Erosion Rates vs. Uplift Rates for more guidance.
Materials
Last updated from official OpenSciEd on 7/1/2026
Student handout
6.4 Lesson 13 Assessment Erosion Rates vs..docx
Google Form
Digitized — add an editable copy to your Google Forms
Teacher guide
6.4 Lesson 13 Teacher Edition.docx
Answer key (recommended)
6.4 Lesson 13 Answer Key Erosion Rates vs..docx