| Time of observation | 6:00 | 12:00 | 18:00 |
| Air temperature, °C | 8 | 25 | 15 |
Brief explanation: The image shows three thermometers. By observing the mercury levels, we can determine the temperature at different times. The problem states that 6:00 AM had the lowest temperature and 12:00 PM had the highest. We need to read the temperatures from the thermometers and fill them into the table.
Answer:
| Time of observation | 6:00 | 12:00 | 18:00 |
| Air temperature, °C | 8 | 25 | 15 |