Product Name: Water Well Pumping

Product Code: KX842

Size: 250*25*120mm

Packing: Packing Bag

Packing: 300PCS

Box Specification: 60*45*55

     Bring yourown bowl

Pump well principle

The piston moves up and down, reducing the pressure.

A well presser is a tool that brings groundwater to the surface. It is made of cast iron, with a cement-like pile at the bottom. The well head is the outlet for water, which is wider at the top and narrower at the bottom. The handle at the end is connected to the well center, about 20 to 30 centimeters long. It becomes brighter after frequent use. The well center is a water-draining skin, which relies on the force of this skin and the well center to press groundwater up. Well pressers were widely used in daily life, but with the development of the times, they are no longer the main water-draining equipment. However, such tools are still found in some places (mainly in rural areas). Inside the well presser is a piston and valve, which are unidirectional. When you pull the handle up, you can extract air from the pipe in the well. By repeating this several times, you can extract groundwater from the well.

III. Teaching Objectives 1. Knowledge and Skills Objectives ① Understand the existence of atmospheric pressure ② Understand the estimation and measurement methods of atmospheric pressure 2. Process and Method Objectives

① Observation and practice to experience the existence of atmospheric pressure. ② Experience the process of independent hands-on investigation to master the scientific investigation method. ③ Through the study of the Torricelli experiment, students will understand and grasp the scientific method of using liquid pressure to study atmospheric pressure. ③ Emotional attitude and value goals ① Through observation, experiment and investigation learning activities, students will cultivate a scientific attitude of seeking truth from facts. ② Through inquiry-based activities, students will obtain the joy of success, cultivate students' interest in participating in physical learning activities, and improve students' self-confidence in learning, stimulate students' learning enthusiasm.

Lesson Four: Key Points and Difficulties Key Points: 1. Recognizing the existence of atmospheric pressure. 2. Estimating and measuring atmospheric pressure. Difficult Points: 1. Proving the existence of atmospheric pressure using multiple methods. 2. Students' independent exploration and estimation of atmospheric pressure. Lesson Five: Teaching Process The teaching process of this class is divided into four teaching sessions: 1. Creating a situation, raising questions to stimulate interest, and introducing the topic. Do you want to see a magic show? The teacher takes out an beverage bottle: "Here is an beverage bottle, I can suck it up with my hands. Do you believe it? Many students don't believe it. The teacher demonstrates the experiment: sucking the beverage bottle with empty hands. After watching the experiment, the students are very surprised and want to try it themselves. After learning about atmospheric pressure, we will understand the reason. Thus, the topic is introduced, and the title "Atmospheric Pressure" is written on the board. The opening starts with a simple and easy-to-do experiment, directly entering the theme, concise and clear, and the experimental equipment comes from life, easily available, allowing students to feel that physics is around us. 2. Group exploration, discussion, and experience the existence of atmospheric pressure.