学生有关物理概念的“前概念”是建构物理概念的最大障碍。对于“前概念”一定要引起足够的重视,并在教与学的过程中反复强化、对比,让学生逐渐学会透过事物的表面看本质是物理教学的重要目的。 Students’ “preconceptions” about physical concepts are the biggest obstacle to constructing a physical concept. For “preconception ” must cause enough attention, and repeated strengthening and contrasting in teaching and learning process, allowing students to gradually learn to see the essence through the surface of things is an important goal of physics teaching.