Hello children, I am Yingbao's mother, we meet again. Today is the last lesson of Mother Yingbao's knowledge about the earth, because in the next lesson we will begin to take you around the world. Let's talk about a very, very interesting topic – the changing of the seasons and the weather.
Every year with the change of time, the weather on the earth, plants and animals will also have different changes, this is the season. For example, spring, the sunshine and rain that spring brings to the earth, is the season when flowers and trees begin to grow, flowers and flowers, and summer, which is the hottest season of the year and the fastest growing season for crops and fruits. After the end of summer, it is autumn, and in autumn the weather gradually becomes colder, and some trees begin to fall leaves. Finally, winter, the day becomes shorter, the weather becomes colder, some animals such as bears, frogs, sleep all winter, when winter is almost over, spring is not far away, just like this, spring, summer, autumn and winter, year after year.
But children, do you know how spring, summer, autumn and winter come about? Let's take out a globe or a round thing, use it as earth, and make a demonstration together. Children must remember that the earth is around the sun, the mother in the orbit, almost a year a circle, but the earth in the rotation is not the standard straight, he crooked a small angle, it is precisely because of this small tilt angle that the sun mother emitted light in the atmosphere through a long or short distance, when reaching the earth, some places will be more, some places will be less.
And it changes with the position of the earth throughout the year, which creates seasons. Mother Yingbao also wants to tell you a particularly interesting thing, if we take the equator as a belt and divide the earth into upper body and lower body, then we on the earth are half of us, when we are shivering in the winter, the Australian children who live in the lower body of the earth are spending the summer.
In addition, not all places have such obvious changes in spring, summer, autumn and winter, and some places have seasonal changes that are not very obvious, such as places with good belts near the earth, like Singapore, where the temperature is similar throughout the year, but sometimes it rains more, sometimes it is less. Most of the time nature is very mild, a little hot, a little cold, rain and snow and other weather changes, will not have a particularly large impact on us.
But he also has his own temper, not always calm, and when he loses his temper, it brings some extreme weather. For example, the wind that can blow the house, the torrential rain that floods the land, etc., make us suffer a lot.
Mother Yingbao will now take you to see 6 extreme weather conditions.
The first, high temperature, heat wave. Listen to the name to know, this time the temperature is particularly high, generally more than 35 degrees for many consecutive days, it is called a high temperature heat wave, which is not an ordinary high temperature. The land is cracked and cracked, and it may cause forest fires. In the past 50 years, there have been high temperatures in our country, and the number of heat waves has increased, do you feel that the summer is getting hotter and hotter?
The second type of flood. Kids, when you pour water into a cup. Does the cup overflow when it is full of water? In the same way, when the rain is particularly heavy and the rain is innumerable. They would overflow from the river and there would be terrible floods that would quickly flood our houses, roads, and farmland. In 1998, there was a very severe flood in China, and Yingbao's mother's hometown was also washed away by the flood and caused great damage. Many people have lost their homes as a result, so floods are indeed a very terrible extreme weather.
Let's talk about the famous tornado, which is shaped like ice cream. But it was empty inside, it was spinning and moving at the same time, with particularly great force and particularly fast speed. You can roll up small trees, even cars and houses into the sky, and it is easier to roll up children. There is a fairy tale, the Wizard of Oz, which tells the story of an American girl who is blown into the enchanted realm by a tornado. Children, you can let your parents tell you. Tornadoes appear for a short time and have little scope of impact. But the destructive power is not small, and it is not a fun thing to really roll you into the sky.
Fortunately, there are fewer tornadoes in China, and there are often tornadoes in the United States on the other side of the Pacific. Therefore, American children are very afraid of tornadoes, although there are not many tornadoes in our country. However, there are many typhoons, and typhoons are also a fierce storm. He has several names, such as some places call it a hurricane, every summer, there will be typhoons from the sea to the land closer to the sea, bringing strong winds and torrential rains, strong winds can blow down trees, rain will turn roads into rivers, and even flood low houses. Therefore, whenever the typhoon comes, the children nearby cannot go to school and can only hide at home.
Children who don't live by the beach may not have seen a typhoon, but you should all be able to see lightning and hear thunder, children, are you afraid of thunder? We can sometimes when it's raining. Seeing a bright light across the sky, it was lightning, and then you could hear a huge thunder rumbling. Lightning is called lightning because it is a strong discharge phenomenon, it hits a tree will cause disaster, if it hits people, it is more dangerous. However, lightning has a characteristic, especially like to hit the highest object, so if you look carefully, you will find that many high-rise buildings have a sharp object on the roof, just like the embroidery needle used to sew clothes, that is, the lightning rod, which can lead the lightning over and prevent the building from being struck by lightning. Oh, because of this feature of lightning, don't take shelter from the rain under the tree when you are lightning.
There are many scientists who believe that in the past few decades, due to our human activities, such as building too many cars, building too many factories, destroying too many forests. The Earth's temperature is slowly rising, and it has brought many unexpected changes, such as the large ice cubes in the Arctic and Antarctic began to melt, and the oceans became more unpredictable. One result is that extreme weather has become more frequent, such as the sudden snowstorm in North America at the end of last year, and even the warm Disneyland in Florida has closed because it is too cold.
If the children are interested, they can ask Mom and Dad to tell you about el niño and la niña. Of course, there are some scientists who don't believe this claim, thinking that the temperature of the Earth is always changing slowly, and there is nothing to be surprised about, but we only have one Earth anyway. Mom's family and your family, as well as your grown-up babies, will be living on Earth, and we need to protect our environment.
Kids, now let's simulate a tornado game. Prepare two idle levels. Then screw the two lids off, put a hole in the center of the two caps, and then glue the two lids together tightly with scotch tape. Fill one bottle with 90% water and screw the two bottles with the double-necked cap that has been glued. Think of the combined bottle as an hourglass and shake the bottle. You will find a huge tornado in the bottle above. After these episodes of the show, the part about the earth is over, and I hope that the children will enjoy the show.
Starting from the next issue, Yingbao's mother will take you to explore the continents where we live and the interesting people and stories above, and there is a lot of interesting knowledge in the world waiting for us to explore. And that's just a small part. I especially look forward to more questions that come to mind when you listen to these shows. Why is that? Why is that? You are very welcome to leave me a message. There are some questions I don't necessarily know the answer to, but I'll explore them with you.