科学 · 物质与材料 · 9

您的孩子在 9 岁左右正在学习科学中的物质与材料内容，并逐步掌握相关知识与技能。

Your child is exploring how materials behave and change — investigating which substances dissolve in water, learning to separate mixtures, and distinguishing between changes that can be reversed and those that create entirely new materials.