题目内容

书面表达

根据下面的提示,写一篇有关水沸腾的实验报告。

实验目的:1.观察水沸腾时的温度;2.观察水沸腾过程中的现象。

器材:烧杯(beaker);水;温度计(thermometer);酒精灯(ethanol light);烧杯架;火柴。

步骤:1.在烧杯里盛100克左右的水;2.在水中放入温度计;3.加热杯中的水,并观察温度计的示数和水的情况。

结果:当温度达到一百摄氏度时,水面出现大量气泡。

结论:1.水在一百摄氏度时开始沸腾;2.水在沸腾过程中有大量气泡产生。

答案:
解析:

  Aims

  1To observe the temperature of the water when it is boiling

  2To observe what happens when water is boiling

  Apparatusa beaker; water; a thermometer; an ethanol light; a beaker holder; matches

  Procedures

  1Fill about 100 g water in the beaker

  2Put a thermometer in the water

  3Heat the water in the beaker, and watch the readings of the thermometer and observe what happens when the water is boiling

  ResultBubbles begin to appear when the temperature reaches 100 degrees centigrade

  Conclusion

  1The water boils when the temperature reaches 100 degrees centigrade

  2A lot of bubbles appear during the boiling


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