[课题2化学是以实验为基础的学科第一课时.ppt

课题2 化学是一门以实验为基础的科学 你知道科学研究的步骤吗？ 熄灭蜡烛 1.观察有什么现象发生，用火柴去点蜡烛刚熄灭时的白烟 (如图1.3所示),蜡烛能否重新燃烧？白烟是什么物质呢？ 2.蜡烛燃烧罩上干冷的烧杯，杯壁上并没有产生白雾，你能分析可能的原因吗？ 3.蜡烛在燃烧过程中会使杯壁变黑，你能想到发生了什么吗？ * Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 中国古代的炼丹设备 西方18世纪中叶的化学实验室 拉瓦锡实验室一角。拉瓦锡利用天平 进行定量研究，弄清了燃烧的本质。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 提出问题 ——猜想与假设——设计实验方案——实验探究——获得结论——交流评价 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1.小明在密封的汽车内感觉呼吸不畅，他认为可能是车内二氧化碳含量较高的缘故，就建议司机师傅打开车窗。就“可能是车内二氧化碳含量较高”而言,属于科学探究中的哪个环节？ 提示：属于猜想与假设的环节。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2.壹元硬币的外观有银白色的金属光泽，有的同学认为它是由铁制成的。在讨论这种说法时，有位同学提出“我们可以先拿磁铁来吸一下”。就“拿磁铁来吸一下”这一过程而言，属于科学探究中的哪个步骤？ 提示：属于科学探究步骤中的实验探究。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3.从事科学实验的重要一环是进行科学实验的设计，科学实验的设计步骤有： ①充分占有资料； ②设计合理的方案； ③明确实验目的； ④进行科学实验； ⑤准备实验器材。其中正确的设计步骤是(