Research On The Design Of The Intensity Of Solid Pressure Synthesis Inquiry Activity In Junior High School

In middle school physics teaching,the knowledge of the intensity of pressure in the actual class did not get enough attention,which leads that students cannot understand the concept of this fully enough and cannot really distinguish between pressure and the intensity of pressure,and which is also not conducive to learning the knowledge of buoyancy and other related knowledge.This paper used "pressure to break the object"as the subject to study and combined with science,technology,engineering and mathematics to carry out a comprehensive study of the pressure.The teaching design of this paper is based on the constructivism and the actual situation in real life.And then we could put forward "How to rescue the people who fall into water from the ice face?"," The relationship between pressure and the breaking of object""How high the apple can be stored?" and other related issues,so that students can do the experimental operation by their own hands.After that,we can analyse the experimental result and get the possible answers to the questions.And then we can do the verification experiment and analyze if the answers are correct.We can also study the breaking of object in microscope,so that the students can understand the differences between pressure and the normal force and notice that only normal force cannot be the factor which reflects the fragmentation of the object.The biggest difference among this article,the traditional teaching design and the existing inquiry-based teaching design is:This article is more close to the reality of life,not the "Mantangguan" of the traditional teaching,nor is it completely open the hand of inquiry teaching,this article aims to find a balance,which can better combine those two.This article also added more experiments such as teacher demonstration experiments,student hands-on experiments and there are more intuitive interesting experiment like "apples support people experiment":Students do experiment first and then get the maximum pressure which the apples can bear,calculate the maximum load which the apples can afford,and then get the relevant value.Finally,we need to do the demonstration experiment.Let a classmate stand on the apple to see if the calculated value is correct.Through this experiment,students would be surprised to find that a small apple can support a person.Such completely subversive cognitive experiments can deepen the impression of students,which can stimulate students' interest in physics and are conducive to the mastery of knowledge.