Triboelectric lesson plan, the principle of triboelectric is simple and easy to understand

1. Objectives:

1. Guide children to find friction and electricity in play.

phenomenon. 2. Understand the superficial knowledge of static electricity generated by friction in the experiment, and stimulate children's interest in scientific exploration.

Naqing.

2. Preparation for the event:

Plastic combs, rulers and pens, plastic bags, paper scraps, sweaters, balloons, homemade cartons of two colors, etc.

Third, the process of the activity:

1. Exploration activities: carrying small confetti.

1) Show plastic combs, rulers, tomatoes, pens, paper scraps, sweaters, balloons, etc., and ask the children to use these tools to carry the small paper scraps in the red cardboard box to the yellow cardboard box.

2) The children communicate the methods of carrying the confetti, and the teacher summarizes it.

2. Try and discuss.

1) Introductory words: "Let's change the method, try to use the friction method, and see what the result is." The teacher demonstrates rubbing a plastic ruler back and forth on the sweater several times, and then approaching the small confetti for the children to observe.

3) Specific operation for young children. Try rubbing it with another item to see if it doesn't happen. For example: using the surface of a blown balloon, the surface of a plastic bag, a plastic pen or a plastic comb.

3. The teacher summarizes the children's findings and tells the children that this phenomenon is static electricity generated by friction. And ask the children to think about when they feel static electricity in their lives?

Fourth, the extension of activities:

2. Help children understand how to eliminate static electricity, such as water or keys.

Lesson plan for science burners in small classes: friction and electricity.

The principle of triboelectric initiation is simple and easy to understand as follows:

1. The phenomenon of using friction to electrify two different objects is called rubbing the limbs and repenting (or the phenomenon that after two different objects rub against each other, one object is positively charged and the other object is negatively charged).

2. Any object is made up of atoms, and atoms are composed of positively charged nuclei and negatively charged electrons, and electrons move around the nucleus. Under normal circumstances, the number of positive charges in the nucleus band is equal to the number of negative charges in the electron band outside the nucleus, and the atom is not electrically charged, so the whole object is neutral.

It is difficult to change the number of positive charges in the nucleus, but the electrons outside the nucleus can get rid of the nucleus and transfer to another object, so that the number of negative charges in the electron belt outside the nucleus changes. When an object loses electrons, it shows being positively charged when the total number of negative charges in its electron band is less than the positive charge of the nucleus; On the contrary, an object that would otherwise be neutral, when it gets electrons, it shows being negatively charged.

3. When two objects rub against each other, the nuclear sensitivity is different, because the ability to bind electrons outside the nucleus of different objects is different, so one of them must lose some electrons, and the other object gains excess electrons. If a glass rod is rubbed against silk, some of the electrons of the glass rod are transferred to the silk, and the glass rod is positively charged due to the loss of electrons, and the silk is negatively charged due to the electrons it gets.