# The display-tray records Made-up practice record. A museum display compares water lost from matching trays over the same 30-minute interval, using the same taught mL reading procedure. Start amounts, place and tray type are matched. Different display labels name trays J, K and L; the source does not specify a cause for differences. The valid supplied lost-water values are J=10 mL, K=0 mL, L=5 mL. Tray M has no recorded value. Tray N spilled, so its value is invalid for this comparison. Another group's matched record gives J=5 mL. These are invented supplied records, not measurements you made. ## Four questions 1. Make a table or columns for J, K and L. Keep the unit. 2. Which record is zero, which is missing, and which had a spill? 3. Compare the two J readings. What could you check next? 4. Can these records prove J always loses 10 mL? Explain. [My empty response page](../responses/C-first.html) · [A08 · whole labelled picture](../aids/A08.svg) · [A08 · complete picture words](../aids/A08-alternative.html) Tell or show it in your usual way: words, drawing, pointing, signing, typing, dictation or your communication device. Work quietly or privately, pause, ask for a helper, or return later. Sharing and recording are optional.
Grown-up help Use after Day 37, following relevant teaching and exposure review. This is original supplied fiction. A neutral reader may read every sentence and question; record help. [Separate staff guide](../staff/C-first.html) · [Teacher desk](../teacher/DESK.html) Modified from [Year 4 Science alignment](https://www.qcaa.qld.edu.au/downloads/aciqv9/science/curriculum/ac9_science_yr4_as_cd_alignment.pdf), [standard elaborations](https://www.qcaa.qld.edu.au/downloads/aciqv9/science/assessment/ac9_science_se_yr4.pdf) and [Years 3–4 techniques and conditions](https://www.qcaa.qld.edu.au/downloads/aciqv9/science/assessment/ac9_science_tc_yr3-4.pdf), © State of Queensland ([QCAA](https://www.qcaa.qld.edu.au/copyright)) 2023, covered [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) with exceptions. Our task criteria are original; these are not official A–E bands. Actual folio and on-balance professional judgment remain necessary.