How to make a small scientific production, how to make a small scientific production

Small electronic balance model, note that this is a model, and it can only weigh very light objects, such as two small scraps of paper. The materials needed for the production are: a wooden board (preferably a little thinner, not too large), a washer, a paper clip, an awl, an electric soldering iron, several wires, two light-emitting diodes, a battery.

These materials are easy to find, and if you don't have LEDs, you can go to the electronics market and buy them, which are very cheap.

The production process is as follows: turn a small hole with an awl in the middle of the board, bend a paper clip into a hook shape, and fix it perpendicular to the board through the small hole, and hook it to hang the washer. Then take two paper clips and straighten them in half, leaving only one turn, which is actually the arm of the balance and the rest of the curved part is the tray.

Another paper clip does the same. Then the two paper clips and washers are welded together, the washers are in the middle, and the paper clips are in a straight line. Then hang the washer on the hook and adjust the distance between the hook and the board, about 3mm.

Then fix two paper clips under two trays, and next to the paper clips are ready to use LEDs as indicator lights. With a circuit underneath the wooden board, the balance is equivalent to a SPDT switch. This circuit is equivalent to two circuits, sharing one power supply and two light-emitting diodes.

As long as the left side sinks, the left tray will communicate with the pin under him, so that the circuit is turned on and the diode emits light; If the weight of both sides is equal, the circuit is not open, and both diodes are not lit.

Try to make an automatic mousetrap, or a mosquito repellent, or something that saves water in your home.

Cans, ashtrays, flower baskets, etc. Let your imagination run wild.

The steps to make a microphone are as follows:Preparation of materials: two paper cups, a piece of wool, — scissors.

Operation steps: 1. Prepare two paper cups, a piece of wool, and scissors.

2. Use scissors to pierce a small hole in the center of the bottom of the paper cup, the hole should not be too big, and it can pass through the line.

3. Thread the end of the thread into the paper cup from the small hole at the bottom of the paper cup, and then tie a knot.

4. Another paper cup also uses the same method to pass the thread through the small hole, and then tie a knot, and the microphone is ready.

Here's how to make a science mini-production:

1. Homemade badminton, prepare an empty drink bottle, two foam fruit net covers, a rubber band, and a glass marble. Take an empty 250ml drink bottle and cut off the top half of the bottle. Divide the cut parts into 8 equal parts, cut them to the neck of the neck with scissors, and cut each part into the shape of petals of the same size.

2. Then put the foam fruit net sleeve on the outside of the bottle and fix it at the mouth of the bottle with a rubber band. Wrap another foamed fruit net around a glass marble, stuff it into the mouth of the bottle, and tighten it to expose about 1 cm. Cut off half of the ping pong ball, cover the bottom of the hemisphere on the mouth of the bottle, cut the four sides into a whisker, cover the mouth of the bottle and fix it with a rubber band.

After beautification and retouching, a homemade shuttlecock was completed.

The significance and role of small invention activities lies not only in creating the actual results of inventions and generating economic benefits to the society, but also in enabling children to get in touch with social reality as early as possible, participate in practice, expand their horizons, develop their intelligence, and cultivate the spirit of exploration and creative ability. Cultivating creative ability is the requirement of the times, and it is also a major reform topic of how education can adapt to social development and serve society.

Knowledge can be taught, and the cultivation of ability, especially creative ability, can only be gradually formed through the student's own practical activities. In the small invention activities, students can give full play to the initiative of the subject through their own observation, selection of topics, design and thinking, and play an important role in cultivating the sensitivity, will, perseverance and thinking of observation.

The production process of the third-grade science Xiao Shichun is as follows:

Tools and materials needed: plastic bottles, foam balls, spoons, foam boards.

1. Prepare the tools and materials for the triboelectric experiment, including plastic bottles, foam balls, spoons, and foam boards, as shown in the figure below

2. Open the bottle and take out the spoon as shown in the picture below

3. Use a spoon to take the foam ball, and the liquid is shown in the following figure

4. Put the foam ball into the plastic bottle of Shiming buried through the peel, as shown in the figure below

5. Shake the foam ball in the bottle as shown in the figure below

6. Take a foam board and rub it on your hair to start electricity, as shown in the figure below

7. Put the foam board close to the plastic bottle and observe the experimental results, as shown in the figure below