Wind blowing bottle principle

1. Storm flask is a possible weather forecasting tool. A transparent solution consisting of several chemicals is packed in a closed glass container. According to the change of outside temperature and weather, different types of crystals will be displayed in the bottle to predict the change of weather. Experiments show that it has no obvious ability to predict the weather and prefers an ornament.

2, the weather forecast bottle is made of glass, crystal clear sphere. The change of crystallization in the bottle is mainly due to the solubility of camphor, potassium nitrate and ammonium chloride in the mixed solvent of water and ethanol changing with temperature. When the temperature changes, the crystallization, precipitation and dissolution rates of the three substances are different, resulting in interaction. The changing speed of temperature will affect the growth size and structure of crystals. Together, these factors lead to beautiful changes in the crystal morphology in the bottle.