论文部分内容阅读
小朋友,你面前有三种配好的溶液:黄色溶液-1份盐,红色溶液-2份盐,蓝色溶液-3份盐。如果将它们两两组合,会发生什么现象呢?你需要:七个用透明塑料吸管剪成的7.5cm长的小短管,彩色铅笔,滴管,黏土,一杯清水,配好的红色、蓝色和黄色的盐水溶液。第一步:把七个小短管竖直插在黏土上,作为试管和试管架,并标上序号。第二步:试验A——用滴管在1号试管里滴入一半黄色溶液,然后,在同一个试管
Children, in front of you there are three kinds with a good solution: a yellow solution -1 salt, red solution -2 parts salt, blue solution -3 parts salt. What happens if you pair them all together? You need: Seven 7.5cm long stubs, colored pencils, eyedroppers, clay, a glass of clear water, red, blue with clear plastic straws Color and yellow saline solution. The first step: the seven small short vertical pipe inserted in the clay as a test tube and tube rack, and marked with the serial number. Step Two: Test A - drop a half yellow solution in a test tube with a dropper, and then, in the same test tube