Test and analysis: The temperature at which a liquid boils is called boiling point. The boiling point of liquid is related to air pressure. The higher the air pressure, the higher the boiling point, the lower the air pressure and the lower the boiling point.

As can be seen from the table, water began to boil in the 5th minute, absorbing heat continuously, and the temperature remained unchanged at 98℃, so the boiling point of water at this time was 98℃. The boiling point of water at 1 standard atmospheric pressure is 100℃, and the lower the atmospheric pressure, the lower the boiling point, so the local atmospheric pressure is lower than 1 standard atmospheric pressure.

Comments: This topic examines the characteristics of water boiling and the factors affecting the boiling point. Mastering the basic knowledge and carefully analyzing the experimental data is the key to solving the problem correctly.