《科学课程标准》中明确指出:“学生是科学学习的主体,学习科学应该是学生主动参与和能动的过程,教师是科学学习活动的组织者、引导者和亲密的伙伴。”亲身经历以探究为主的教学活动是学生学习科学的主要途径。同时,观察、实验、调查又是探究科学的学习方法。学习科学能力的形成依赖于学生的主动参与探究,能力的培养要靠教师在教学中潜移默化地渗透。没有实实在在的参与, “Science Curriculum Standards” clearly states: “Students are the main body of science learning, learning science should be the process of active participation and initiative of students, and teachers are the organizers, leaders and close partners of science learning activities.” To explore the main teaching activities is the main way for students to learn science. At the same time, observation, experiment and investigation are also methods of studying science. The formation of ability to learn science relies on the active participation of students to explore, ability to rely on teachers in teaching imperceptibly infiltration. Without real participation,