浮力现象是学生在生活中比较熟悉的,也是学生比较感兴趣的现象.“探究浮力大小与什么因素有关”既是力学的核心内容,又是初中物理的重点、难点内容.课程标准提出“科学探究具有多维的课程目标,除了学习知识、训练技能以外,还在发展能力、提高科学素养方面发挥重要作用.应该让学生通过设计实验、收集和分析实验数据等自主活动来提高能力,让学生在实验中认识尊重客观数据的重要性从而养成实事求是的科学态度,在实验的相互配合中发扬合作精神,在认真收集实验信息中培养严谨的科学态度和科学精神等”.初中学生的思维方式正逐步由形象思维向抽象思维过渡,教学中要注意培养学生对物理的兴趣,充分发挥学生实验的作用,迎合他们好奇、好动的心理特点,调动他们学习的 Buoyancy phenomenon is students are familiar in life, but also students are more interested in the phenomenon. “To explore the buoyancy size and what factors ” is not only the core content of mechanics, but also the focus of junior high school physics, difficult content.Curriculum standards proposed “In addition to learning knowledge and training skills, scientific inquiry has a multi-dimensional course goal that plays an important role in developing abilities and improving scientific literacy. Students should be empowered to improve their abilities by designing experiments, collecting and analyzing experimental data and other autonomous activities Students understand the importance of objective data in the experiment so as to develop a scientific attitude of seeking truth from facts, carry forward the spirit of cooperation in the mutual cooperation of experiments and cultivate rigorous scientific attitude and scientific spirit in carefully collecting experimental information. ” Way of thinking is gradually from the image of thinking to the transition to abstract thinking, teaching should pay attention to cultivate students’ interest in physics, give full play to the role of experimental students to cater to their curious, active psychological characteristics, to mobilize their learning