Most centimeter rulers only have graduations down to mm, so a measurement would go to 2 decimal places (cm . mm + one uncertain digit).

Is this used in the procedure? I don't see it. Maybe delete.

Materials list mentions a "shape sheet" (which I authored easily in Google Slides). Not sure what a "three shape object" is... maybe just use the shape sheet.

Materials list says "sugar", but the procedure says "salt".

Testing my first annotation with this account. "Go forth and annotate", will do!