6 Salt and cement食盐和水泥 Salt Cement Chopsticks 食盐 水泥 筷子 Let's observe the change of salt and cement. 我们来观察食盐和水泥的变化。 Can the dissolved salt be seen again? 溶解的食盐还能再看到吗？ Look at ...... 你看...... Let's give it a try! 我们试一试！ How will the cement change? 水泥会发生怎样的变化？ Tell us how they have changed. 说说它们的变化。 Broken Glass 碎玻璃 Change of glass 玻璃的变化 When a substance such as glass is broken, it can be restored to its original form by certain means. 玻璃等物质破碎后，通过一定方式可以恢复到原来的样子。 What about changes like cement? 像水泥这样的变化呢？ The relationship between material change and human life. 物质变化与人类生活的关系。 Continue to observe, investigate, and classify the phenomena of material change in life. 继续观察、调查生活中物质变化的现象，并进行分类。 |
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