Final answer:
The student is instructed to measure the length of a Play-Doh core and the thickness of each layer to simulate geological sediment layering, documenting their findings in a table.
Step-by-step explanation:
The question seems related to a Science activity involving modeling sediment layers using Play-Doh. In such an exercise, it's important to measure and record various attributes of the sediment layers for analysis. The instructions you have given seem to imply the following steps should be taken:
Measure and record the total length of the Play-Doh core in millimeters.
Measure and record the thickness of each Play-Doh "sediment" layer, starting with the upper-most layer and documenting it in a designated table (Table 5.1 - Play-Doh "sediment" layer characteristics).
By doing this accurately, you can compare the different layers and understand their sequence and proportion within your core sample. This activity may simulate real-world geological processes of sediment deposit and interpret the geological history of an area.