Question

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 record an experiment and demonstrate learning

to convince readers that the boiling point of water is 99.51 degrees celsius

to inform readers about water impurities

to suggest that accurately reading a thermometer is an important skill

Explanation:

• Analyze Option 1: The text reports the measured boiling point of water, discusses sources of error, and suggests improvements for future experiments. This aligns with recording an experiment and showing what was learned from it (e.g., about errors and improvements).
• Analyze Option 2: The text isn’t trying to convince readers the boiling point is 99.51°C; it’s a measured value with an error, not an argument to persuade.
• Analyze Option 3: Water impurities are just a source of error, not the main focus of the text.
• Analyze Option 4: Reading a thermometer accurately is a minor part (a source of error and improvement), not the main purpose of the text.

Answer:

to record an experiment and demonstrate learning