西林区第四中学module5alessoninalab之二内容摘要：
l a test tube with water and add two or three clean nails. (2) Leave the tube for one week. Aim To find out if iron rusts in ordinary water. Apparatus clean iron nails, a test tube, test tube holder Method Result The nails rust in the tube with ordinary water. Conclusion Iron rusts in ordinary water. Iron in ordinary water Iron nails rust in wet air. cotton wool nails water water water The nails haven’ t rusted The nails do not rust The nails rust A Simple Scientific Experiment 1. In the first part of the experiment, the ___ is dry ,not wet . 2. It shows that iron ___________ when the air is dry . 3. In the second part of the experiment, you must ____ the water to make sure there is no ____ in it . air does not rust boil air 4. You add ________。阅读剩余 0%
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