一、根据初中地形知识的难易、深浅程度和知识出现的顺序,大体可分为4个层次。 第一层次:地形概念、地形要素、地形名称和地形数据。第二层次:地形分布规律、地形类型及地形特征、地形成因和地形演变。第三层次:地形要素的时空变化、地形区域和地形要素的综合分析。第四层次:不同类型的地形 First, according to the difficulty of the terrain knowledge of junior high school, the degree of depth and the order of knowledge appearing, it can be roughly divided into four levels. The first level: terrain concept, terrain elements, terrain names, and terrain data. The second level: the distribution of topography, topographic types and topographical features, topographic causes, and topographic evolution. The third level: a comprehensive analysis of the temporal and spatial changes of terrain elements, topographic regions, and topographical elements. Level 4: Different types of terrain