Cool-Water Design Investigation
Library package prepared 2 November 2026. Revised guides are marked with that date; unchanged teacher and student/core editions retain their file labels. Use the matching current guide supplied beside each task.
Keep this package with the teacher. Choose one stage at a time. Distribute only its student files and required sources. Teacher keys and reserved independent/follow-up/later tasks have separate folders. A teaching model may intentionally contain an answer; keep checks for later use aside during teaching.
PDF and available native editable files are included. Open the linked preparation page for accessible browser versions, current printing directions and any additional equipment. Online links need an internet connection. Timings are planning estimates; these materials do not establish classroom effectiveness or test equivalence.
Cool-Water Design Investigation
Plan a fair cool-water comparison, record baseline and prototype trials, then redesign and retest. Includes a complete supplied-data alternative.
Prerequisites: Read °C and time, subtract decimal readings, distinguish temperature from energy, and follow comparison conditions. Measuring 150 mL and safe probe placement are also required for practical work.
Prepare: Review the operational card and verify equipment/conditions before practical work; preparation time depends on local equipment. Supplied data needs only selected copies. Timing: Practical: about 74 minutes per phase, with supervised continuation if needed (planning estimate). Supplied data: split comparison/proposal and retest/reassessment into separate stages; timing varies.
Open the current preparation, browser versions and response decisions
Default starting selection: Practical first comparison: directions and blank trials. Read the matching teacher guide first. Select the response route from the observed work, then use its separate check at the named occasion.
- Practical first comparison: directions and blank trials — student.
- Practical redesign: commit the plan — student.
- Practical retest: instrument checks and trial 1 — student.
- Practical retest: directions, instrument checks and trials 2–3 — student.
- Practical results: reassess and explain — student.
- Later reasoning assessment — student.
- Matching teacher guide and answers — teacher.
- Supplied data, part 1 — compare and keep the proposal — student.
- Supplied data, part 2 — new evidence after the proposal — student. Complete and keep the proposal from part 1 before opening part 2.
Keep attribution and resource-specific notices. Print and adapt for planning/classroom use under the Terms of Use. Selected coverage is not a complete course.