The Case Opens
Thu, Sep 10, 2026 · Week 3 · Principles of Biomedical Technology (Principles of Biomedical Science)
Today's goal: Open your section's case: record what each released document states, label what you add, start the timeline with sources, and write one open question for the scene walk.
The bicycle-shop model shows the method. Use your section's released records for your Daily Evidence Sheet. Keep the bicycle-shop times out of your case log.
Worked on the sheet's separate bicycle-shop practice case, never on Case A or Case B:
Log entries (source, label):
- 2:38 AM: the call record states this call time. (Practice DOC-1, O)
- About 2:32 AM: arrival estimated by subtracting six minutes from 2:38 AM. (Practice DOC-1 plus arithmetic, I)
- 2:05 AM: the alarm log records the alarm. (Practice alarm log, O)
- The caller reports arriving 'about six minutes earlier'. (Practice DOC-1, O)
Time gap (B3): 2:38 minus 2:32 = 6 minutes; 6 / 60 = 0.1 hours.
Open question (Part C): What happened between the 2:05 AM alarm and the caller's arrival? The call record states the call time and the caller's approximate arrival (O). The arrival is my estimate from the caller's words (I). The alarm log records a different event 33 minutes before the call. Neither document says who was present in between, so today's documents cannot answer it.
This model shows the level of evidence and organization needed to complete: The Daily Evidence Sheet's initial observations log of ten entries labeled O or I with sources, first timeline entries with a source column, and one open question for the scene walk with its Part C explanation.
- Read the Day 4 briefing and the grouped glossary; complete Part A of the Daily Evidence Sheet from the assigned reading.
- Record ten entries in the initial observations log, each labeled O or I, each with its source.
- Start the first timeline in Part B with at least five entries and sources; compare the sources in B2; show the time gap with units in B3.
- Write one open question for the scene walk in Part C and explain in 3 to 5 sentences why today's documents cannot answer it.
- Finish Parts D and E, then hand in the paper sheet or submit one PDF to your section's assignment.
Keep the structure. Replace the question, facts, measurements, and evidence. Then recheck units, vocabulary, and whether the conclusion goes beyond the evidence.
Also due today: Hand in the paper Daily Evidence Sheet or submit one PDF of it to your section's Wk3 D04 · The Case Opens (PLTW 1.1.1) assignment by September 10 at 11:59 PM.
Hand in the paper sheet or submit one PDF of it to your section's Wk3 D04 · The Case Opens (PLTW 1.1.1) assignment by September 10 at 11:59 PM. Notebook pages stay in your Investigative Notebook.
Turn in: PBS1282: Wk3 D04 · The Case Opens (PLTW 1.1.1), 8520290030, paper or one PDFClaim ceiling: Today you may record what a source states, label what you add, compare sources, calculate a time gap and explain an unanswered question. Today's documents cannot name a cause of death, a manner of death or a responsible suspect.
One exam-style question that uses exactly what you practiced today. Try it before you reveal the answer, then read why each choice is right or wrong.
Tap an answer to see the full explanation. Nothing is recorded or graded.
It builds this reusable test skill: Separating a recorded observation from an added inference in a sourced log.
- Name the concept or data pattern being tested.
- Cross out choices that violate that rule or the evidence.
- Justify the best remaining choice before checking the answer.