What is the principle of colorful magic Christmas tree? Dabbling in chemistry?

Using the principle of capillary phenomenon. Insert a tiny glass tube into water, and the water will rise to a certain height before stopping; However, when mercury is inserted into a small glass tube, the mercury will drop to a certain height in the tube; This is the capillary phenomenon at the interface of solid, liquid and gas.

The reason why the "Christmas tree" blooms is that when the paper tree is soaked in the chemical aqueous solution of potassium dihydrogen phosphate, the aqueous solution quickly penetrates into the paper tree and reaches the whole paper tree; The aqueous solution at the end of the paper branches evaporates first, and white crystals will appear, which is "snowflake". Because the colored pigments coated on the paper tree in advance are absorbed by the crystal, the Christmas tree becomes a colorful "flower".

Extended data

Historical story

In the past, Alsace in Germany (now generally translated as Alsace, belonging to France) was the origin of Christmas trees. According to legend, there lived a hermit named Florence in a forest in Alsace. He was very fond of children. One Christmas, he wanted all the children in the neighborhood to have fun together, but he was poor and had no money to buy toys and sweets that children loved, so he was very nervous about it.

One morning, when Florence was walking in the Woods, I suddenly saw a small fir tree. The tree was covered with snow and there were many small ice bars hanging from its branches. After the sun shines, it is very beautiful. He brought the tree back and planted it in a flowerpot. Pick up some wild fruits in the forest, mix them with flour, make some cross or star cakes and hang them on the branches.

Some small candles were inserted in the branches, which made the tree colorful and beautiful. On Christmas Eve, the Florence Pavilion rang the bell. When the children heard this, they all ran to his hut. Everyone dances around the tree and sings Christmas songs. Then the Florence Pavilion distributed cakes to the children and had a happy Christmas. Later, this custom spread.

1837, after Princess Helen of Germany married the Duke of France, the Christmas tree followed? [3] Paris. 184 1 year, Victoria's husband put a Christmas tree in front of Windsor Palace. This custom spread from the royal family to the aristocratic class, and then became popular among the people. 1830, a large number of Germans immigrated to the United States.

These people have both Catholic friends and Christians, and most of them are scattered in new york and New England. Their Christmas tree attracted the attention and imitation of local people, and then became popular in American churches and families. Around the world, especially in Europe, America and Australia, Christmas trees have become the most lively and lovely decorations for Christmas, dotted with colorful Christmas, symbolizing happiness and hope.

As for the decoration of Christmas trees, it seems that the whole world is similar. Because Christmas is in winter, Christmas trees are made of evergreen trees. Most of them are small palm trees or pine trees four or five feet high, which are planted in large flowerpots. The trees are covered with colorful candles or small electric lights, and then all kinds of decorations and ribbons are hung, as well as children's toys and gifts from their families.

Put it in the corner of the living room when decorating. If placed in a church, auditorium or public place, the Christmas tree is relatively high, and gifts can also be placed under it.

According to the record of Christmas custom, the first Christmas tree was a small palm tree along the road in Bethlehem, Israel. On the first night of Jesus' birth, the Virgin Mary and St. Joseph were very tired when they walked to Bethlehem. The virgin Mary is resting under that tree. The little palm tree, as if it were loved, spread its branches and protected the virgin from the cold wind.

Jesus Christ was born at midnight. At this time, a particularly bright star appeared in the sky, which gave off wonderful light and directly hit the head of the small palm tree, forming a beautiful light circle. Since then, small palm trees have occupied a glorious position at Christmas. As for the popularity of Christmas trees all over the world, it was only in the nineteenth century.

In the Middle Ages, the popular religious drama in Germany was a scene in the Garden of Eden. After God created man, when Adam and Eve betrayed God, a palm tree full of apples was used to represent the tree of life or the tree of knowing good and evil. Later, the friend trick of the tree of life in the letter moved to the home, symbolizing the coming of the savior. With the development of this symbol, it became a custom to decorate the Christmas tree in15th century.