来自刘明雷的问题
物理变化和化学变化的现象有哪些?各举十个例子.
物理变化和化学变化的现象有哪些?各举十个例子.
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2020-06-03 10:14
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白振国
物理变化：1、把一张纸撕碎2、水变成水蒸气3、蜡烛变短4、水结成冰5、铁水铸成铁锅6、衣服缩水7、白纸涂成红色8、筷子断裂9、扳手被别弯了10、表丝断了化学变化1.火柴燃烧,2.氢氧化钠变质,3.生物生长,4.植物光合作用...
2020-06-03 10:16:20
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