Science and technology small production kit: Madburg ball

[Design concept]

There are many aspects in human life and production that need the knowledge of atmosphere and atmospheric pressure. Understanding atmospheric pressure and feeling the existence of atmospheric pressure are the basis of learning the knowledge about atmospheric pressure. Air can't be seen or touched, and atmospheric pressure can't be felt at ordinary times, so doing demonstration experiment is the key to this class. In the teaching design of this class, many experiments which are vivid and interesting and can explain the existence of atmospheric pressure are arranged, which can not only arouse students' interest, but also make students really feel that atmospheric pressure is around us.

[teaching objectives]

1. Knowledge and skills

(1) Through experiments, we know that atmospheric pressure exists objectively.

(2) Know the cause of atmospheric pressure.

(3) Know the Torricelli experiment and its principle

(4) Understand that atmospheric pressure is related to altitude and weather.

2. Process and method

(1) Through demonstration experiments, cultivate students' ability of observation and analysis.

(2) Through the study of Torricelli experiment, students can understand the equivalent substitution method of studying atmospheric pressure with liquid pressure.

(3) Through the analysis, discussion and explanation of atmospheric pressure phenomenon, cultivate students' logical thinking ability, ability to apply knowledge and sense of cooperation with others.

[Teaching emphasis]: the existence of atmospheric pressure and the measurement of atmospheric pressure