高中地理必须修读1第4课时第四节.ppt

　第四节　自然灾害对人类的危害 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. 新课学前导航 情景导入 2011年一季度全国自然灾害以 干旱、低温雨雪冷冻和地震为 主，部分地区还遭受了洪涝、 风雹、山体滑坡和泥石流、森林火灾、病虫害等灾害，灾害与近年同期基本持平。 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. 冬麦主产区发生秋冬连旱，山东、河南等8省不同程度受灾；贵州、湖南、重庆等10省(自治区、直辖市)遭受低温雨雪冷冻灾害，部分地区大范围道路、电线表面结冰，当地群众生活受到影响。 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. 【思考】　结合材料分析我国的自然灾害主要有哪些？ 【提示】　干旱、低温雨雪冷冻和地震为主,部分地区还遭受了洪涝、风雹、山体滑坡和泥石流、森林火灾、病虫害等灾害。 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. 学习目标 1.了解自然灾害的概念、特征和类型。 2.了解自然灾害的危害和中国主要的自然灾害。 3.理解洪涝灾害的概念和我国洪涝灾害频发的原因。 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. 一、自然灾害的概述 1．概念：是指发生在_________系统中，能造成人们生命和财产损失的_______事件。 2．主要特征：_______________、复杂性、________、突发性、__________、群发性。 3．按成因与发生过程分类：___________灾害、气象灾害、______灾害、海洋灾害等。 地球表层 自然 潜在性 周期性 多因性 地质地貌 生物 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. 4．自然灾害的危害 社会稳定 人员伤亡 间接 Evaluation only. Created with Aspo