阿基米德定律是初中物理教学的重点和难点.从教学内容看,阿基米德定律涉及的物理概念多,而且各物理概念之间容易引起混淆,如G排和G物,ρ液和ρ物,V排和V物,这些内容都是教师在教学中应该注意的.从教材的结构看,尽管教材编写人员为了降低难度,在教材中利用“曹冲称象”或“石头放水中排出水”的例子引入F浮与V排有关,但没有F浮与V排有关的具体的物理过程.如果教师 Archimedean law is the focus and difficulty of junior high school physics teaching.From the teaching content, Archimedes’ law involves many physical concepts, and the confusion between the various physical concepts, such as G row and G objects, ρ liquid and ρ objects, V rows and V objects, these contents should be noted in the teaching of teachers from the structure of teaching materials, in spite of the textbook writers to reduce the difficulty in the textbook use “Cao Chong said ” or “stone The example of the discharge of water from a discharge ”introduces the specific physical processes that F float relates to row V, but no F float relates to row V. If the teacher