# Assessment Instructions: ASTR 120 Problem Set 07

## Inputs to Inspect

- Student submission for Problem Set 07.
- Student problem set: `materials/ASTR120/problem-sets/problem-set-07.html`.
- Instructor solution key: `materials/ASTR120/problem-sets/problem-set-07-solutions.html`.
- Course syllabus and grading policy: `materials/ASTR120/syllabus.html`.
- Lecture artifacts for Lectures 13-14.

## Grading Standard

Assess habitability reasoning, flux calculations, planetary-protection arithmetic, mission traceability, uncertainty, evidence quality, and communication. Full credit requires cautious claims and explicit distinction between habitability, biosignature potential, and life detection.

## Problem-Level Criteria

- Problem 1: matrix categories, supporting evidence, uncertainties, scores, and cautious conclusion.
- Problem 2: relative flux calculations, Earth comparison, limitations of flux-only habitability, and four follow-up measurements.
- Problem 3: contamination-reduction chain, expected-value reasoning, scientific risk, and mitigation choices.
- Problem 4: science question to measurement to instrument traceability, architecture tradeoff, disconfirming observation, and planetary-protection requirement.

## Feedback Requirements

Separate arithmetic slips from conceptual errors and evidence overclaims. Identify unsupported habitability claims, missing uncertainties, non-reproducible calculations, and mission concepts that do not measure the stated question.

## Integrity and Evidence Checks

Flag fabricated mission facts, copied web mission concepts without attribution, unsupported biosignature claims, and untraceable calculations.

## Resubmission Pathway

Students may revise with a change note. Require a corrected evidence chain or mission traceability table, not merely softened wording.