Useful scientific handicrafts

Useful scientific hand-made works include: simple wind turbine, volcano model, paper cup speaker and homemade rainbow.

1. Simple wind turbine: A simple wind turbine can be made by using the basic principle of converting wind energy into electric energy. On campus or at home, a small wind turbine can be connected to the battery, and the battery can be charged by natural wind. When current is output, electric energy can be consumed by electric appliances such as light bulbs.

2. Volcano model: Volcano is a natural phenomenon, and its formation and eruption process involve scientific principles such as geology and chemistry. Using clay, gypsum and other materials to make a volcano model can vividly show the shape and eruption process of the volcano. At the same time, we can also simulate the phenomenon of volcanic eruption through experiments.

3. Paper cup speaker: Stick a small hole in the bottom of the paper cup, put a magnet in it and connect a music chip to make a simple speaker. When the magnet is acted by the magnetic field of the music chip, it will drive the paper cup to vibrate and make a sound. This kind of works can show the principle of sound propagation in physics.

4. homemade rainbow: you can make your own rainbow by dividing sunlight into seven colors through a prism. In sunny weather, put the prism in the corner of the room, adjust the angle, let the sunlight form a spectrum through the prism, and you can see the beautiful rainbow. This kind of work can show the principle of optics.

The steps of making a simple solar water heater are as follows:

1. Prepare some materials: a large plastic bottle, some aluminum foil, some black paint, some adhesive tape and a pair of scissors.

2. The steps are as follows:

Cut the plastic bottle in half, leaving the bottle mouth at the bottom.

Paint the inside of the plastic bottle black with black paint, so that it can absorb sunlight better.

Wrap the outside of the plastic bottle with aluminum foil to reflect sunlight.

Punch holes in the aluminum foil with scissors so that water can be heated through these holes.

Fix the aluminum foil on the plastic bottle with tape.

After the production is completed, we can put this simple solar water heater in the sun and let it absorb sunlight and convert it into heat energy. These heat energy can be used to heat water and provide convenience for our life. For example, it can be used to heat food at picnics or boil drinking water in outdoor activities.

This kind of scientific handwork can not only help us understand the working principle of solar energy, but also play a role in real life. Through this project, we can see how scientific knowledge is applied to our daily life and how to change our quality of life.