1. Discover the working principle of a small toy scale.
2. A scale can be used to distinguish which object is heavy and which object is light.
3. I like to make simple toy scales, gain specific experience in making toy scales, and experience the fun of success.
Two. Provision of materials
1, several physical scales, various items with different weights.
2. A batch of chopsticks, disposable plastic bowls, thread (about 15 cm), pens and "weights";
Three. Operation level
The first level: observing the small toy scale, I will play the scale freely and discuss the materials and methods of making it.
Level 3: Toy scales can be used to distinguish the weight of objects.
The third level: try to make your own toy scale, find out the reasons why the work is unsuccessful, and make adjustments until it is successful.
Four. Guidance suggestion
1, to guide children to find that with the increase of weight, the distance between the weight and the scale becomes longer and longer.
2. When making a small toy scale, it depends on whether the child uses four pieces of red with the same length to pass through the hole. If there are mistakes, you can guide them in time.
Verb (abbreviation of verb) technique
When making a small toy scale, you can do it yourself or cooperate with one or several children to complete the operation.