花香四溢、木已成舟 水滴石穿、磨杵成针 滴水成冰、集腋成裘
实验探究
化学变化中有新物 质生成及伴随的现象。
把《化学实验报告册》翻到第 3页,观察实验,完成填空。
反馈二
1.石墨变成金刚石、红磷变 成白磷,氧气变成臭氧
是化学变化吗?
2.灯泡通电时发光放热是化 学变化吗?
4.北京举办2008年奥运会时,环保 问题引起国人的极大关注。我们生 活中,有利于环保的物质越来越多。 例如:太阳能热水器,无氟冰箱等, 你还能举出类似的例子吗?对于环 保你能做什么?
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