Final answer:
When measuring temperature using a thermometer, typically the stem should be inserted approximately 2 inches into the liquid and left for about 30 seconds to ensure an accurate reading. After gently inserting the thermometer in 10 ml of water in a test tube, record the resultant temperature on the Data Sheet.
Step-by-step explanation:
When using a thermometer to measure the temperature of water, the procedure typically involves a specific way in which the thermometer must be inserted and the duration it should be left in the substance to obtain an accurate measurement. Although the question does not specify the exact number of inches or seconds, a common practice when measuring liquids is to insert the stem of a thermometer approximately 2 inches into the liquid to ensure that it is fully submerged without touching the bottom of the container, which can affect the accuracy of the reading. The thermometer must be left in place long enough to reach thermal equilibrium with the liquid, which is generally around 30 seconds. This ensures that you are measuring the temperature of the water rather than the initial temperature of the thermometer itself.
During an experiment, after placing 10 ml (10 grams) of water into a test tube, it's crucial to measure the temperature carefully. This step involves gently inserting the thermometer into the test tube without letting it touch the sides or bottom, and waiting the required time. After the wait, record the temperature on the Data Sheet to complete the data collection for Step 2.