A short story about cultural geography

According to folklore, the weaver girl descended to earth and lived a free life with the cowherd. After hearing the news, the Queen Mother forcibly brought the Weaver Girl back to the Heavenly Palace, and the Cowherd chose a son to chase the sky. The cruel queen mother separated them with gold hairpin. Looking up at the night sky, Vega in Lyra and two nearby dark stars form a triangle, much like a woven shuttle. Altair in Aquila and two dark stars form a "one" shape, like a cowherd carrying two children with a pole. The direction of the Milky Way is perpendicular to the connection between the Cowherd and the Weaver Girl, just like separating them on both sides of the river. After listening to this story and observing the starry sky, students can easily identify these two stars and several constellations.

2. Burning Gourd Valley and Cyclone

In the later period of the Three Kingdoms, Zhuge Liang made a northern expedition to the Central Plains and visited Qishan six times. Sima Yi and Wei Jun were once trapped in Huluyu. There are fires all over the mountain, trying to burn all the enemies to death. Sima and his son couldn't escape this fate, crying to die. Unexpectedly, a sudden heavy rain doused the mountain fire, and Sima survived. In fact, the rain was not "providence", but Zhuge Liang himself. The raging fire caused the air near the mountain area to heat up and the air pressure to decrease. Cyclone is formed in the low pressure area, and it rains in the center due to the rising, cooling and condensation of air. That is to say, there was cyclone rainfall in Huluyu. Although Zhuge Liang is familiar with astronomy and geography, he lacks modern scientific knowledge and doesn't know what a cyclone is. Otherwise, he may use other tactics to annihilate Wei Jun.

3. Take advantage of the east wind and monsoon

On the eve of Battle of Red Cliffs, Zhou Yu sent troops to attack Huang Gai. Offering a series of stratagems to set Cao Jun on fire, I suddenly remembered that I had neglected a major event and was very ill. Zhuge Liang took the opportunity of visiting the sick to point out that Zhou Yu's illness was "only caused by the east wind" and promised to borrow the east wind to help him. Why does Zhou Yu "owe" Dongfeng? Because the ancient battlefield of Chibi lies in the monsoon region of eastern China. It was the middle of winter, the northwest wind prevailed, and the southeast wind rarely blew. Cao Ying is in Jiangbei and Soochow is in Jiangnan. Attacking with fire will burn your home. Zhou Yu's anxiety is reasonable and in line with the climate law. The so-called "borrowing from the east wind" is actually Zhuge Liang's prediction of short-term weather anomalies around winter, which is just a mystery. Concepts such as monsoon, climate and weather can be naturally derived from this story.

4. German submarines and density current

During World War II, German submarines often entered and exited the Strait of Gibraltar from the Mediterranean and attacked the allied forces in the Atlantic Ocean. After several losses, the allies sent warships to guard the strait and listened with sonar. They plan to blow up the submarine with a depth charge as soon as they hear the motor sound. After listening for many days, there was no sound, but the German submarine slipped out of the strait and appeared in the Atlantic Ocean. It turns out that the surface seawater of the Gibraltar Strait flows from the Atlantic Ocean to the Mediterranean Sea, and the bottom seawater flows from the Mediterranean Sea to the Atlantic Ocean. The Germans took advantage of this. When crossing the Strait of Gibraltar, they turned off all the machines and walked with the help of the current. The allies waited for the rabbit, but let it slip under their noses. This ocean current belongs to the density current, and its causes can be introduced into the content to be studied in the textbook.