苏教版三年级《科学》教材中,《把固体放到水里》一课有一个让小朋友做结晶分离的实验,具体的实验方法是:1.在热水里加盐(最好是氯化钾),充分搅拌,使盐完全溶解,一直加到盐恰好不再溶解;2.在热盐水中加入绘画颜料,使溶液着色;3.把各种颜色的热盐水放在纸盒内,周围塞好报纸,这样 Su Jianban third grade “science” textbook, “put the solid into the water,” a lesson for children to do the experiment of crystal separation, the specific experimental method is: 1. In hot water salt (preferably chlorinated Potassium), stir, the salt completely dissolved, has been added to the salt just no longer dissolve; 2 in the hot salt water paint added to make the solution coloring; 3. various colors of hot salt water on the carton, around Plug the newspaper, so