溶解与溶液
Dissolving & Solutions
理解有些材料在液体中溶解后会形成溶液，并能描述如何通过蒸发从溶液中回收物质。
Understand that some materials dissolve in liquid to form a solution, and describe how to recover a substance from a solution by evaporation
学习证据 / Evidence
- 解释溶解是指固体完全混入液体中形成溶液。
- 描述如何通过蒸发液体来回收已溶解的物质。
- 区分混合物（能看到分开的部分）和溶液（看起来澄清、已完全溶解）。
- Explain that dissolving means a solid mixes completely into a liquid to form a solution
- Describe how to recover a dissolved substance by evaporating the liquid
- Distinguish between a mixture (can see separate parts) and a solution (looks clear, fully dissolved)
评估问题 / Assessment
{{name}}能解释糖在茶中溶解时会发生什么，并想办法从盐水中把盐弄回来吗？
Can {{name}} explain what happens when sugar dissolves in tea, and figure out how to get the salt back from salty water?