Canonical lesson CHEMISTRY20-U2-L06 · outcome 20-B1.2sts · depth CURRICULUM_BASELINE

Unit B: Gases - outcome 20-B1.2sts

• Course: CHEMISTRY20 (SCN2796)
• Lesson ID: CHEMISTRY20-U2-L06
• Official outcome: 20-B1.2sts (STS)
• Object type: canonical lesson (not a bootcamp session)
• Source: Alberta Chemistry 20 Program of Studies (2007, updated 2014)

Official outcome text

explain that the goal of science is knowledge about the natural world (NS1) • describe examples of natural phenomena and processes and products (such as breathing, diffusion, weather, hot air balloons, scuba diving equipment, automobile air bags, gas turbines and internal combustion engines) that illustrate the properties of gases

Learning intention

Meet 20-B1.2sts 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

Gases appear in breathing, weather, balloons, air bags, and engines. Describe properties (expandability, pressure) without performing hazardous demos.

Worked example

Map: phenomenon → gas property. Breathing ↔ volume/pressure; weather ↔ P changes; air bag ↔ rapid gas generation (engineering description only). Student adds hot-air balloon: Charles-law qualitative.

Guided practice

1. Add scuba / depth pressure as a qualitative P increase example.
2. Near-miss: generating H2 for balloons. Forbidden.

Independent practice

1. Four phenomenon→property pairs.
2. Two sentences: NS1 knowledge goal.
3. No Aboriginal plant-weather claim invented - hold FNMI_LOCAL_REVIEW.

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

Deploying or dissecting an air bag.

Safety and lab register

Setting: Descriptions only. No gas generation, no air-bag handling. 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

Four-row gas applications map.

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

AI Tutor / human tutor

Ground on 20-B1.2sts. 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.