Based on the data gathered, we measured the boiling point of water as 99.51 degrees Celsius. The error against the expected measurement was 0.49 percent. Sources of error may have been impurities in the water, contamination of the equipment, or human error in reading the thermometer. If we repeated the experiment, we might achieve more accurate results by sterilizing our equipment, using distilled water, and verifying that the thermometer's readings are correct.
What is the text's main purpose?
to convince readers that the boiling point of water is 99.51 degrees Celsius
to suggest that accurately reading a thermometer is an important skill
to record an experiment and demonstrate learning
to inform readers about water impurities