Canonical lesson CHEMISTRY20-U2-L05 · outcome 20-B1.1sts · depth CURRICULUM_BASELINE

Unit B: Gases - outcome 20-B1.1sts

• Course: CHEMISTRY20 (SCN2796)
• Lesson ID: CHEMISTRY20-U2-L05
• Official outcome: 20-B1.1sts (STS)
• Object type: canonical lesson (not a bootcamp session)
• Source: Alberta Chemistry 20 Program of Studies (2007, updated 2014)

Official outcome text

explain that science provides a conceptual and theoretical basis for predicting, interpreting and explaining natural and technological phenomena (NS5) • describe how the development of technologies capable of precise measurements of temperature and pressure (such as thermocouples, thermistors and Bourdon gauges) led to a better understanding of gases and to the formulation of the gas laws

Learning intention

Meet 20-B1.1sts with instruction, practice, and a check. The 10-session bootcamp does not replace this lesson.

Success criteria

1. Restate the outcome in classroom language without swapping in a different unit’s template.
2. Complete the worked-style task for this outcome.
3. Name the lab setting (classroom-supervised / teacher demo / dataset or simulation / forbidden).

Teaching

Better thermometers and pressure gauges historically enabled precise gas laws. Describe the tool → better data → clearer P-V-T relationships (NS5).

Worked example

Timeline card: crude air thermoscopes → mercury thermometers → modern sensors; Bourdon gauges for pressure. Student: one paragraph linking precise T,P measurement to Boyle/Charles formulations.

Guided practice

1. Name one modern sensor (thermocouple/thermistor) and what it improves.
2. Near-miss: compressing aerosol cans in a freezer “experiment.” Forbidden.

Independent practice

1. Paragraph: tool → data quality → gas law confidence.
2. Two sentences: prediction power of gas models.
3. Setting: paper / video demo by teacher only.

Diagram / whiteboard

Approved diagram id chem20-pv-boyle - P-V Boyle sketch (or gas law axes). Tutor may open the course whiteboard and display this id. Do not invent hazardous procedures on the board.

Checks for understanding

Use the formative evidence below as the exit check for this outcome. Correct the misconception named in this lesson before praising.

Misconception to repair

Building a pressure vessel at home.

Safety and lab register

Setting: No compressed-gas student experiments. Paper/teacher demo only. AI Tutor must not invent labs outside CHEM20_LOW_RESOURCE_LAB_REGISTER.csv.

Alberta Poison Control if a real exposure is occurring: 1-844-764-7669. The AI Tutor is not a poison centre.

Formative evidence

One STS paragraph with a named measurement tool.

This is not a diploma. Mastery needs instruction + activity + check.

AI Tutor / human tutor

Ground on 20-B1.1sts. No false praise. No invented procedures. No silent skip to a different unit. Human tutor if the student describes mixing bleach, tasting, or flames.

Provenance

Official POS wording from ALBERTA_SENIOR_HIGH_OFFICIAL_OUTCOMES.csv. Pack lesson written to replace Wave-4 contaminated canonical markdown.