Chemistryisasubjectofsciencebasedonexperiment.Teachersshouldpayattentiontoplaytheroleofexperimentinthecourseofteaching.However,teachingexperimentdoesn'tequalsimpledemonstrationexperiment.letstudentsthemselvesthinking,exploration,cultivatestudents'practiceability,atthesametime,italsocultivatetheircreativity,enhancestheirchemicalinterest.