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水的净化

适用年级 1-6 年级

key word:Digital inquiry experiment system

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原理 

第一层第二层 石子沙子等,除去较大不溶性杂质;第三层,活性炭,利用其吸附作用,可吸附一些有色物质或无色物质。第四层,石英砂,具有絮凝、吸附等作用,去除水中的杂质。

 

目的 

了解水的净化的操作。

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