Projects / X06 · Text version | Year 4 Science · T1 W7–8

Compare a paper scale with 10 mL marks to a made-up claim of an exact 20.123 mL. Explain the problem.

Try it

Read the complete practice scale: equal marks at 0,10,20,30,40 mL.
Compare its marker at 20 mL with the invented claim 20.123 mL. Write what the marks can and cannot support.
Check the product and say why you kept or changed one part. 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

**Look for:** The scale does not support that extra precision; suggest an appropriate reading/estimate for the familiar instrument procedure. **Next help:** If extra decimal places are accepted, point to the actual 10 mL gaps and ask which marks would support them. Keep 20 mL as the supplied marker reading. [Full lesson](../lessons/day-36.html) · [Source facts/limits](../references/PRIMARY-READING.html) · F1 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.