初中《科学》教材在课程内容编排上,将以往的生物、地理、化学、物理诸课程有机地穿插连贯起来。在实验方面,除了演示实验和分组实验之外,还有实验与制作及研究性学习课题等内容。着力于培养学生的探索性思维和创新能力。本文介绍用可乐瓶(即能耐压的碳酸饮料瓶)制作物体浮沉的条件演示器和气体做功内能减少演示器,培养学生的动手能力,提高学习兴趣,通过实践使学生对课文内容有更深刻的理解。一物体浮沉条件演示器的制作 Junior high school “science” teaching material in the course content arrangement, the past biology, geography, chemistry, physics courses organically interwoven. In the experiment, in addition to demonstration experiments and group experiments, there are experimental and production and research study topics. Efforts to develop students’ exploratory thinking and innovative ability. This article describes the use of Coke bottles (that is, pressure-resistant carbonated beverage bottles) to produce the objects of the sunk conditioners and gases to work within the power to reduce the presentation, training students ability to enhance interest in learning through practice so that students have more content on the text Deep understanding. Fabrication of an object’s condition indicator