New Year's Eve is a day that everyone likes very much. It is based on the observation of different shapes of the moon by the ancients in China (actually called the moon phase), and on this day, the moon phase is very close to the new moon. Today, you can not only get an annual salary, but also have a sumptuous New Year's Eve dinner, which has a history of thousands of years and contains many scientific truths.

In the south, fried rice cakes and rice cakes are eaten every New Year's Eve. They are crushed by rice, stirred with water and made into cuboids. After molding, put it in a packaging bag, and the air inside will be exhausted, so it can be listed. It makes sense to fry this basic cooking skill. Fried rice cakes also add a lot of vegetables. The temperature in the pot is high, and the molecules in the rice cake and vegetables are doing random thermal exercise, so the taste of vegetables can not only penetrate into the rice cake, but also move in the air, so especially when the rice cake is about to be cooked, the tangy smell will only make people drool. The rice cake is amorphous and will soften slowly after heating. You can install it at a certain level. Therefore, the principle of frying is very simple, that is, let the molecules do random thermal exercise to "flavor".

Let's talk about the north and the south first. You must eat jiaozi during the Chinese New Year, usually from evening 1 1 until the next day 1. In ancient times, it was called Zishi, which means "making friends with young people". Jiaozi looks like an ingot, so it makes sense to put the plate on the table and make a fortune. It's time to talk about the production method of jiaozi. In jiaozi, the general method is to boil, the fire is slowly heated, and the water is slowly heated. Release jiaozi when cooking. Jiaozi absorbs heat quickly, and the water keeps bubbling because of boiling, so jiaozi can "dance" by himself. Because jiaozi expands when heated, its volume becomes larger, so its buoyancy becomes larger. When the buoyancy is greater than its own gravity, jiaozi floats. After a while, the hot jiaozi appeared, which shows that cooking is to make food absorb heat by boiling water.

With the development of economy, science and technology and people's innovation, there are many professional kitchen utensils, which are only responsible for one cooking method.

Steamer, as its name implies, is to live for steaming. Imitate the ancient steamer in China, reduce the size, change the materials, and humanize the design, and enter the homes of ordinary people. The principle of steaming is also very simple. When water boils at the bottom, it boils and gives off steam. Food absorbs heat from gas and is cooked slowly, usually at the top. Maybe you have to ask, why does the top floor cook first when the second floor is closest to the bottom floor? Good question, the top floor is sealed with a pot cover, so the water vapor can't continue to rise under the pot cover, so all the food on the top floor absorbs heat, so the top floor is cooked first.

Pressure cooker, a giant, is famous in the pot industry. Its task is to stew. Add water, food and seasoning. Cover and install the upper limit valve. Let's go The pot is almost completely sealed, and only the air inlet and outlet limiting valve has a small hole, so the air inside is limited. When the temperature rises, the air pressure increases, and the limit valve is "capped" to make it completely closed, so that the air pressure in the pressure cooker rises again, thus increasing the boiling point of water, turning water into steam when it is higher than 100℃, accelerating the irregular thermal movement of water molecules, and having seasoning function. Therefore, the stew tastes more fragrant and the soup is stronger than any other method. However, the throttle valve is very humanized. When the air pressure is too high, part of the gas is discharged to reduce the air pressure and eliminate the danger.

Oven, it appeared for baking. In the past, baking was that food directly contacted fire to absorb heat. Although it is rich in color and delicious, if it is not grasped well, it will be burnt and even fire will occur. And some foods can't be in direct contact with fire, or they will be burnt, such as egg tarts. The originality of the oven is to convert electric energy into heat energy and heat it evenly with the resistance wires inside, so that food that can't be touched by fire can be heated and people can bake food.

Science is actually around us. Sometimes, one more observation may be one more contribution to the scientific community. Sometimes, with a little more patience, you can find a scientific mystery for yourself; Sometimes; With a little more work, you can meet unknown science. Therefore, science is around us, and the study of science is passed down from generation to generation like the Olympic torch. So, let's study the enthusiasm of science!