After listening to Zhang Zian's explanation, everyone suddenly realized how the bobbit worm had managed to sneak in.
Electrician Wu couldn't stop complaining about Welder Zhao. He complained that Welder Zhao only knew how to save money. If he had bought ready-made live rocks from the aquarium, this wouldn't have happened … Now, his precious grandson was almost bitten. What could he do?
In fact, everyone knew that even if Electrician Wu's grandson had put his hand into the tank to catch a clam worm, he might not have been bitten by the bobbit worm. After all, the bobbit worm was not stupid. A child's arm was much thicker than a clam worm's, so it was not on its menu. But Electrician Wu was angry, so no one added fuel to the fire.
Welder Zhao was in the wrong, so he could only endure the complaints.
In order to make amends, he immediately went to the kitchen to get a bottle of disinfectant and poured it into the tank to poison the bobbit worm.
Zhang Zian stopped him and told him not to be impulsive. There was too much water in the fish tank. Not to mention a bottle of disinfectant, even if a box of disinfectant was poured into the tank, it would not reach a lethal dose. Besides, the bobbit worm was famous for its tenacious vitality. Disinfectant might not be able to kill it.
Wang Qian sighed. "Chicken flavor, crunchy … Too bad Bear Grylls isn't here."
"Even Bear Grylls wouldn't eat this!" Li Kun complained.
Wang Qian objected. "Maybe Bear Grylls would be interested in challenging it."
Zhang Zian asked, "Master Zhao, you said there's a water pipe at home? Borrow it. Find some water basins and buckets and bring them over. "
"Okay, wait for me." Welder Zhao was at a loss. Whatever others said, he would do.
He ran to the kitchen, and after a few clangs, he came back with a bucket in his hand, a basin under his arm, and a water pipe on his shoulder.
"Are these okay?" he asked.
"Yes, no problem." Zhang Zian nodded and looked at the children, who were scared and at a loss. He smiled. "Children, today I will demonstrate a simple scientific principle called the siphon phenomenon."
If there were other adults, such as Welder Zhao's daughter-in-law, they would definitely ask the children to hide in other rooms to avoid being scared or injured. However, Welder Zhao was a rough man, and Electrician Wu was so angry that he lost his mind. Neither of them thought that they should let the children stay away for a while.
The children stood by the wall in a dilemma. Without any instructions from the adults, they didn't know whether to stay or leave. They were more or less frightened. Even the naughtiest children were well-behaved at this time.
Zhang Zian noticed this. In order to prevent them from being traumatized in the future, he simply took advantage of the situation and used scientific experiments to divert their attention.
Generally, little girls of this age might not have much interest in scientific experiments, but these little brats were all naughty boys. They were full of curiosity about the world, and if they saw a dog hole on the road, they would want to go in and take a look …
Sure enough, when they heard that they were going to do a scientific experiment, they all became very interested and gathered around.
Zhang Zian inserted one end of the hose into the fish tank, placed a bucket on the ground, and inserted the other end of the hose into the bucket.
The fish tank was placed on a wooden frame that Welder Zhao had built himself. The bottom of the tank was more than half a meter above the ground.
Seeing this scene, the adults knew what Zhang Zian was going to do, but the children didn't.
He gave the adults a look and ordered, "Don't just stand there. Bring all the water bottles at home and start boiling water now. The more, the better. We're going to drown the seven armies later!"
Welder Zhao and Electrician Wu seemed to have woken up from a dream. They turned around and went into the kitchen. The electric kettle and the gas stove went to work together. They boiled pot after pot of water and poured it into the thermos for later use.
Zhang Zian squatted down, held the other end of the hose, and showed it to the children. "Do you think that the water can automatically flow from the fish tank into the bucket?"
The children saw that the high end of the hose went into the bottom of the fish tank, but the hose was propped up by the tank wall like a mountain, and the lower end went into the bucket. They all shook their heads.
"Of course not. The middle is so high. The water can't go up!"
"That's right. Water flows downwards. Uncle, you can't do this. You have to make the hose flat!"
"But it doesn't seem like there's a way to make it flat … You have to fill the fish tank with water first?"
They chattered one after another.
Wang Qian and Li Kun shook their heads helplessly. They thought that their master was addicted to showing off in front of the primary school students …
Maybe it was because Sihwa always called him uncle, but Zhang Zian's face twitched when he heard that. He emphasized, "Do I look like an uncle to you? I'm obviously a big brother! "
The primary school students were speechless.
Zhang Zian said, "You don't think it's possible? Watch carefully! "
As he spoke, he lowered his head and sucked on the lower end of the hose. He saw the water pour in from the top end of the hose, over the highest point, and straight down. He moved his mouth away and put the lower end of the hose into the bucket.
An interesting phenomenon appeared. Even though he stopped sucking, the seawater in the fish tank continued to flow out of the hose.
The children were all stunned. Someone reached out and pulled on the hose, but the hose was not affected. Water continued to be pumped out of the fish tank.
The bucket was soon full. Wang Qian had already prepared a basin to catch the water. Li Kun carried the bucket to the toilet to empty it and then brought it back. The two of them took turns.
There was a lot of water in the fish tank, and it couldn't be pumped out in a short time. Zhang Zian took the opportunity to explain, "You should often hear the word 'atmospheric pressure' when you look at the weather forecast. There is pressure in the air. Although air is light, the atmosphere is very thick, and it weighs heavily on each of us. Water also has water pressure. The deeper the water, the higher the water pressure …"
He tried to explain the principle of the siphon phenomenon as concisely as possible. He talked until his mouth was dry. He hadn't touched physics for a long time, so some of the details might not be completely correct, but the general principle was clear.
The children didn't seem to understand, so they took a few thin pipes and tried it themselves. Sure enough, it worked.
They might not understand the principle at the moment, but at least they remembered this interesting phenomenon.
When Zhang Zian finished explaining, the water in the fish tank was almost completely pumped out. Even the sand at the bottom was almost completely pumped out. The clam worms had nowhere to hide, and a few small fish were struggling in the remaining water with their tails.
The bobbit worm was hiding inside the reef and still hadn't shown itself. It might have sensed something strange and had a premonition of impending disaster.
The remaining thin layer of water really couldn't be pumped out, so Zhang Zian scooped all the small fish out with a fish scoop and put them into the bucket. He didn't want the saying, "A fire at the city gate brings disaster to the fish in the moat."
"Okay, you guys go out and play. Don't just focus on playing. Don't forget the principle I just talked about! I spent a lot of effort, and a lot of my brain cells died! "Zhang Zian waved his hand and sent the children away.
The children made a ruckus for a while, discussing whose family they would harm next. Then, they all ran away.
Electrician Wu and Welder Zhao boiled pot after pot of water. All the containers at home that could keep warm were filled to the brim. They even borrowed a few thermos bottles from the neighbors.
Zhang Zian called out to everyone. Everyone present, including Jiang Feifei, rubbed their hands and rolled up their sleeves, ready to fight the bobbit worm.
Everyone picked up a thermos or a boiling kettle, surrounded the fish tank, and poured the boiling water onto the reef.
The fish tank was suddenly filled with hot steam.
Everyone put down the empty containers, picked up the full containers, and continued to pour the boiling water onto the reef.
The unlucky clam worms were quickly scalded to death, floating on the water at the bottom of the tank.
Zhang Zian reminded everyone, "Everyone, be careful. The bobbit worm can come out at any time. Don't be so scared that you drop the thermos into the tank …"
Before he finished speaking, a dark-brown figure rolled out of the reef. It was obvious that it had been scalded to the point that it was better to die than to live, and it could no longer hide.
Jiang Feifei instinctively screamed. Fortunately, she held the thermos bottle firmly and didn't let go.
Everyone's faces turned pale, because the length of the bobbit worm was beyond their expectations.
It was a one-and-a-half-meter fish tank. Zhang Zian originally estimated that it was half a meter long, but in fact, before its body could fully stretch out, it was already more than half the length of the fish tank.
Its whole body was steaming, and it circled the fish tank over and over again. Its ferocious mouth opened and closed, and it moved its countless legs. It even wanted to climb up the wall of the tank to escape.
However, no matter where it ran, the boiling water was poured there. Even if it climbed up the wall of the tank, it would be poured down.
As the hot water in the tank increased, the movement of the super tenacious arthropod became slower and slower. After the last time it was poured down the wall of the tank, it finally stopped moving and floated on the water with its back facing the sky.
As the saying goes, "A centipede dies, but it doesn't fall down." Everyone was afraid that it was pretending to be dead, or that it wasn't completely dead yet, so they poured a few more bottles of boiling water on it. Seeing that it still didn't move, they were relieved and wiped off the sweat on their foreheads that was caused by excitement, nervousness, fear, disgust, and other emotions.
Wang Qian and Li Kun put down the thermos and took out their phones to take pictures and videos. They were ready to show off on their WeChat Moments.
Welder Zhao stared at the reef worriedly and asked, "Are there any more inside? Why don't we just throw the reef away? "
"There's no need. The reef is already safe. With so much boiling water, except for a small number of microbes that might still be alive, the rest of the creatures have all been scalded to death," Zhang Zian said with certainty.
"Really?" Welder Zhao was still not completely relieved.
Zhang Zian borrowed a pair of gloves from him and moved the steaming reef away piece by piece.
After the last reef was moved away, there were the remains of a few small fish underneath. They had been eaten beyond recognition.
"No wonder the small fish here are disappearing one after another. Dead fish and dead fish …" Electrician Wu shook his head and sighed. He pointed at Welder Zhao and said, "You, be more careful! Your retirement salary is quite high. Do you really need a few dollars? "
Welder Zhao was still scared. He nodded and said, "Wu, you're right. I won't dare to do it again … Anyway, the water has been pumped out. I might as well buy some sea salt and learn to mix artificial seawater. Boss, if we buy it together, can it be cheaper?"
Everyone was speechless.
Wang Qian pointed at the body of the bobbit worm and asked, "What about this worm?"
"It's already cooked. Let's go back and make a dish. It'll probably taste like spicy crayfish!" Li Kun replied.
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