3.
Development by time.
First, pre-heat, cool, and weigh a clean, dry Pyrex test tube on a chemical balance to the nearest 0. Olg. Next, record the mass in the Data
Table on the following page. Use a platform balance to weigh out approximately 1.5 g of C.P. grade copper (II) oxide. Then transfer it to the
weighed Pyrex tube. Now reweigh the tube and contents to the nearest 0. Olg. Do not forget to record the mass as before.
In this paragraph describing the process of scientific measurement, all six sentences follow each other in time. The steps of the process are
arranged in the order in which they actually happen.
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