Case sharing of solar terms theme
A light rain brought new flowers, and a thunder began to wake up. We are about to usher in a dynamic solar term in the twenty-four solar terms-shock.
Thorns are colorful, peach blossoms bloom buds, willows sprout, and orioles sing green willows; Bees are busy collecting honey, swallows build nests with mud, and farming is also busy.
In this special spring, we can't see many scenery, and we can't go for an outing. However, nothing can stop the arrival of spring. "A year's plan lies in spring", and the science box has prepared a theme activity plan and interesting scientific experiments for the kindergarten, so that the children returning to school will be full of harvest and live up to the great spring!
1. Understand the origin and customs of the solar terms of fright, and feel the cultural interest brought by fright;
2. Through scientific experiments, let everyone deepen their impression of solar terms in their hands and minds;
1) about the solar terms of fright.
Scared sting, also known as "Qixi Festival", is the third of the 24 solar terms, and the time is on March 5-6 every year. Sting reflects the phenomenon that natural creatures germinate and grow under the influence of rhythm changes. The symbolic feature of the fright is that spring thunder suddenly moves and everything is full of vitality. As the saying goes, "Spring thunder stung", which means that spring thunder starts to ring when it stung, awakening hibernating insects.
At this time, the Ninth Five-Year Plan has been completed, the temperature has risen, everything has sprouted, and nature has a new vitality.
By the time of the earthquake, the average temperature in most parts of China reached 12 to 14, which was more than three times higher than the rainy season. This is the solar term with the fastest temperature rise in a year, and the sunshine hours have also increased significantly. However, due to the alternation of cold and warm air, the weather is unstable and the temperature fluctuates greatly. As the agricultural proverb says, "When it is a day of fear, the hoe will not stop." At this time, most parts of southern China have entered the busy season of spring ploughing, and the northern region has gradually entered the spring, and spring ploughing has gradually started from south to north.
Tips: During the period of fright, bacteria also begin to breed, which is particularly easy to cause colds this season. Children should pay attention to prevent influenza ~
2) Sting custom
The main customs of scaring people are covering drums, expelling insects, beating villains and eating pears.
Cover the drum with skin. Thunder is an important feature of solar terms. The ancients imagined Thor as a bird's beak, a winged god, holding a hammer in one hand and knocking on many drums around his body in the other, making a rumbling thunder. On this shocking day, Raytheon played drums in the sky, and the world also took this opportunity to cover the drums.
Insect repellent is shocking. At the beginning of February in mid-spring, a thunder woke up all the hibernating snakes, insects, rats and ants, and reptiles and ants at home rose up and searched for food everywhere. Therefore, in ancient times, people would smoke the four corners of their homes with incense and wormwood to drive away snakes, insects, mosquitoes, rats and musty smells.
Beating villains is a folk custom, which is unlucky on the day of shock. Everything is shocked, and the world is thunderous. People pray for a better life and look forward to a happy future. This is the custom of "beating a villain". I was shocked by the custom of "beating small people". While beating a paper doll with wooden slippers, the woman recited the villain's spell: "Beat your little head until you are so angry that you will vomit when you eat."
Eat pears. There is a custom of eating pears in surprise. This is because the weather is obviously warmer after the sting, and people are prone to dry mouth and cough due to exogenous factors. Pear is cold and sweet, and has the effects of moistening lung, relieving cough, nourishing yin and clearing heat. Eating pears is very nutritious for your health.
Experiment 1: Air cannon
Surprised by nature, the world is thunderous, and people will beat villains to come and go. Today, we will make an air cannon and listen to the banging thunder to hit the villain.
Experimental materials: scissors, balloons, paper cups, transparent glue, paper cards and other targets.
Experimental steps:
1. Cut a hole in the bottom of the paper cup with scissors;
2. Cut off the balloon mouth with scissors;
3. Put the balloon on the mouth of the paper cup and fix it with transparent tape;
4. Grab the cup with one hand, aim at the target with a small mouth, and pull the balloon to launch with the other hand.
Experiment 2: Insect repellent sachet
Sting will wake up all hibernating snakes, insects, mice and ants. Let's make sachets to repel insects!
Experimental materials: sachet, teabag, Pogostemon cablin, Perilla frutescens, wormwood, clove, Pogostemon cablin, mint and tangerine peel.
Experimental steps:
1, manually crushing traditional Chinese medicine;
2. Put the traditional Chinese medicine into a cup and stir;
3. Pour the mixed Chinese medicine powder into the tea bag;
4. Finally, put the tea bag into the sachet.
Is there any scientific basis for the rule that plague begins in winter, thrives in spring and ends in panic?
China's ancient calendar has repeatedly verified that the plague began with heavy snow, originated from winter solstice, was born in slight cold, was longer than severe cold, flourished in the beginning of spring, was weaker than rain, and declined in fright. For thousands of years, all the plagues in China have followed this law. So, is there any scientific basis for this statement?
First, the virus needs an intermediate host. These intermediate hosts are mostly cold and humid, mainly caves, mostly non-carnivores. The existence of the virus may be related to the cold and humid living environment. Secondly, the survival probability of viruses at temperatures above 45℃ is very low (some viruses need more than 60℃), which is one of the reasons why viruses choose intermediate hosts, including humans, to survive and spread. The survival of the virus may be related to temperature. In addition, the spread of viruses is regular, and there are many forms of communication between people, but viruses may have time to spread logic besides physical communication logic.
Although it is already in shock, the child still needs to wear a mask and wash his hands frequently ~
May the children have a busy and fulfilling spring ~
# Stunned # # Twenty-four solar terms # # Science #