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浅谈初中物理实验资源的开发和利用

作者:高振坡  人气: 2596 次  时间:2010年12月11日  星级:

实验改革是物理课程改革的重要环节,是落实物理课程标准,全面提高学生科学素养的重要途径,也是重要的课程资源。怎样更好地开发和利用实验资源呢?笔者结合自己实际教学略谈三点,供同行参考。
  一、挖掘实验室资源,提高实验器材的利用率
  1.开放实验室,增加学生实验次数。要充分地开发和利用实验室的丰富课程资源,必须改变实验室的封闭式管理状态,通过建立开放性实验室鼓励学生主动利用实验仪器进行各种探究活动。探究题目可来源于教材或课外习题,根据题目猜想假设、制定计划、选择器材、进行实验、分析论证、评估交流,让学生自由探究。这一活动对突破教学难点和提高学生探究能力大有裨益。
  2.开发实验器材,力争做到一物多用。如何能充分利用实验室现有的实验器材,让实验器材的性价比更高,这是新课改对实验老师提出的新课题。在教育教学中,我们开动脑筋,不断尝试将实验室里的器材加以组合或开发,可以让一个器材完成更多的实验探究。比如:试管,我们可以充分发挥试管在教育教学中的作用,利用试管探究音调问题。用嘴对着空试管吹,让其发声,再在试管中加一些水,再对着试管口吹气,让学生去体会声音的不同,从而去感觉音调;在学习大气压强的时候,可以做“大小试管”的实验(图1),让学生体会大气压强的存在。在学习浮力的时候,可以利用试管制作浮沉子(图2)演示上浮、悬浮、下沉。还可以制作潜水艇模型演示潜水艇原理(图3);再如:激光笔和平面镜是用来探究光的反射规律的,我们还可以用它改变光传播路径的功能将桌面发生的微小形变加以放大(图4),使学生看的更清楚。以上实例说明其实只要我们开动脑筋、多思考、充分利用实验器材,开发更多的实验,让实验器材可以发挥更大的作用。
 二、挖掘生活资源,体会生活处处皆物理
.........

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