OpenSciEd Unit 7.1 · Lesson 14 · 14.A
Part 1 Explaining
Assessment guide
How to read student work on this assessment — standards alignment, what strong understanding looks like, and common gaps.
Learning progression
Target understanding
14.A Collect data to produce evidence and use the patterns in the properties of substances to make an argument about whether malic acid secreted by algae is causing a chemical reaction to break down the calcium carbonate in the marble of the Taj Mahal.
Standards alignment
14.A Collect data to produce evidence and use the patterns in the properties of substances to make an argument about whether malic acid secreted by algae is causing a chemical reaction to break down the calcium carbonate in the marble of the Taj Mahal.
What understanding looks like
Strong
- See scoring guidance in Part 1 of the Assessment.
From Teacher Edition
View assessment opportunity →Facilitation guidance from the lesson plan — what to notice in student thinking and how to respond while teaching.
Building towards
14.A Collect data to produce evidence and use the patterns in the properties of substances to make an argument about whether malic acid secreted by algae is causing a chemical reaction to break down the calcium carbonate in the marble of the Taj Mahal.
What to look / listen for
See scoring guidance in Part 1 of the Assessment.
What to do
See scoring guidance in Part 1 of the Assessment. If students struggle with particular items on this assessment, use Item alignment guide to identify related items on the alternate part 2 assessment that could be used for supporting relearning/mastery learning. Each item on the assessment has been aligned with different parts of the performance expectations so the alternate assessment could be used as a reassessment.
Materials
Last updated from official OpenSciEd on 7/1/2026
Student handout
7.1 Lesson 14 Assessment Part 1 Explaining.docx
Google Form
Digitized — add an editable copy to your Google Forms
Teacher guide
7.1 Lesson 14 Teacher Edition.docx
Answer key (recommended)
7.1 Lesson 14 Answer Key Part 1 of.docx