化学家凯特 · 3 The STEM Night Disater
CHAPTER TWENTY-FIVE Reaching Out Liquid nitrogen (noun). The liquid form of nitrogen. It's super cold. So cold that it could burn you. Just like you would never drink boiling oil, you'd never drink this. It's that cold. "I WANT TO USE MY MONEY to do a livestreaming event," I said. "Maybe we could do science experiments on the internet like you do, Dr. Caroline. I could use my prize money to get all of the materials we'd need, and people might like them so much that they'd donate to the school. And maybe we could raise enough money to fund everyone's ideas. Phoenix could get composting bins for the garden and Elijah could start a battle of the bands!" "Woo-boy!" Dr. Caroline put her hand up to her forehead like it was blazing hot. "That's a lot of ideas." "We have two fifth grade classes," said Birdie. "So forty of them." "You want to do a science show like mine?" asked Dr. Caroline, after she was quiet for a moment. I nodded. She looked like she was
液氮(名词)。 氮的液态。 超级冷。冷到能烫着你。 就像你永远不会喝滚烫的油一样,你永远不会喝这个。 就是那么冷。“我想用我的钱办一个直播活动,”我说。 也许我们可以像你一样在网上做科学实验。 卡洛琳。我可以用我的奖金去买我们需要的所有材料,人们可能会非常喜欢它们,他们会捐赠给学校。 也许我们可以筹集到足够的资金来资助每个人的想法。 凤凰城可以为花园准备堆肥箱,以利亚可以开始一场乐队大战!”“Woo-boy !”博士。 卡洛琳把手放在额头上,就像热得要命一样。 “这是很多想法。”“我们五年级有两个班,”小鸟说。 “一共四十个人。”“你想做一个像我这样的科学节目吗?” 卡洛琳,她安静了一会儿。 我点了点头。她看起来是这样的
thinking about something and then smiled. "Let's do it! Let's do it here and now. And it won't cost a thing. You can use your prize money as the first donation for the event. Let me just set up the livestreaming funding app on my phone, and we'll see what science fans all over the world will donate to fund these awesome ideas—ideas that will give you all even more learning opportunities. Plus, I've got the perfect bonus demo." She grabbed her phone. "While I'm doing this, why don't the rest of you take a five-minute water break?" That's when Jeremy came up to me. He hung his head. "I'm so, so sorry, Kate. For messing everything up. I think you really did figure out the best way to use the prize money." "Thanks," I said. "I hope this works and we can get those soccer goals you want." Jeremy nodded and I could see his parents standing nearby looking pretty serious. I'm sure he was going to get a very big lecture when he got home tonight. Dr. Caroline went back to the microphone. "Okay, everyone, it's time for our demo. And for our livestream fundraiser to begin." Dr. Caroline made a few taps on her cell phone and before we knew it, we were livestreaming a
想着什么,然后笑了。 “我们开始吧!”让我们现在就在这里做。 而且不会花一分钱。 你可以用你的奖金作为活动的第一笔捐款。 让我在手机上设置一个直播资助应用程序,我们将看到世界各地的科学爱好者会为这些很棒的想法捐款,这些想法将给你们带来更多的学习机会。 另外,我还有完美的奖金演示。” 她抓起手机。“当我在做这个的时候,你们为什么不休息五分钟喝点水呢?”这时杰里米来找我。 他垂下了头。“我非常非常抱歉,凯特。 把一切都搞砸了。 我认为你确实找到了使用奖金的最佳方法。” “谢谢,”我说。“我希望这能起作用,我们能达到你想要的目标。” 杰里米点了点头,我看到他的父母站在旁边,神情严肃。 我敢肯定,他今晚回家时一定会被狠狠地教训一顿。 卡洛琳医生回到麦克风前。 “好了,各位,我们的演示时间到了。 我们的直播筹款活动也要开始了。” 卡洛琳医生监听了她的手机在我们意识到之前,我们就在直播
fundraiser in our multipurpose room. She asked our AV guru, Ms. Gottfried, to film. Dr. Caroline looked at both Birdie and me. "I want you two to stand up onstage. We're going to make a cloud." That seemed just perfect. Because I was already on cloud nine. That means your happy place, according to my dad. Only Dr. Caroline was going to make an actual cloud. "This is my all-time favorite demo," said Dr. Caroline. "And it's my finale. Because I've gotta catch a plane home tonight!" The idea of Dr. Caroline leaving made me a little sad. But only just a smidge. Because there I was standing next to Dr. Caroline, who was about to do her favorite demo ever. With me. I just knew I would remember this day for the rest of my life. "We're going to make actual clouds inside the multipurpose room?" asked Birdie, who looked just as wowed as the audience. "Yes! Yes!" I was already clapping. "So right there you have a bucket of liquid nitrogen," said Dr. Caroline. She pointed to the white bucket. I knew that was when nitrogen, usually a gas, was cooled so much that it became a liquid. "It's super cold!" I said.
在我们的多功能厅举行筹款活动。 她问我们的AV大师,Ms。 戈特弗里德,去拍摄。卡洛琳医生看了看伯蒂和我。 “我想让你们两个站在台上。 我们要造一片云。” 这看起来太完美了。因为我已经飘飘欲仙了。 那是你的快乐之地,我爸说的。 只有卡洛琳博士打算造一朵真正的云。 “这是我一直以来最喜欢的演示。” 卡洛琳。“这是我的最后一集。 因为我今晚要赶飞机回家!”博士的想法。 卡洛琳的离开让我有点难过。 但只是一点点。因为我当时就站在。 卡洛琳,她要表演她最喜欢的小样了。 和我在一起。我只知道我的余生都会记住这一天。 “我们要在多功能厅里造真正的云吗?”伯蒂问,她看起来和观众一样惊叹。 “是啊!是的!”我已经在鼓掌了。 “所以就在那里,你有一桶液氮。” 卡洛琳。她指着那只白色的桶。 我知道那是氮气,通常是气体,被冷却到一定程度,变成液体的时候。 “超级冷!”我说。
"Exactly!" exclaimed Dr. Caroline. "Almost negative 200 degrees Celsius. Don't touch it or drink it. Safety first. That's why I'm handing you all goggles" —I took a pink pair and Birdie grabbed a blue one—" and cryogenic gloves to protect your hands. And in this blue bucket I have hot water at about 80 degrees Celsius." "Hot!" I said, blowing up my cheeks. That's about 175o F. So, really hot! "Are you ready for this?" asked Dr. Caroline. "Oh yes!" I shouted. "So ready!" said Birdie. Dr. Caroline asked us to stand a few steps behind her as she put her goggles firmly on her head. "So you girls are going to count to three backward for me." "Three. Two. One!" we cried. And then Dr. Caroline poured the hot water into the bucket of nitrogen. There was a loud crackly sound. A cloud poofed into the air. It was so thick that I couldn't even see my gloves. "Oh, look look!" I shouted. "The liquid nitrogen turned into a gas. So cool!" Ms. Gottfried tossed Dr. Caroline her phone so that she could start filming from behind the cloud. The crowd gasped and hooted and hollered.
“完全正确!”卡罗琳医生叫道。 “几乎是零下200摄氏度。 不要碰它或喝它。 安全第一。这就是为什么我要给你们每人一副护目镜”——我拿了一副粉色的,伯迪拿了一副蓝色的——“还有保护双手的低温手套。 这个蓝桶里装的是80摄氏度左右的热水。” “热!”我说着,扬起了脸颊。 大约华氏1750度,非常热!“你准备好了吗?” 卡洛琳。“哦,是的!”我叫道。 “准备好了!”小鸟说。博士。 卡洛琳让我们站在她身后几步远的地方,她把护目镜牢牢地戴在头上。 “所以你们姑娘们要为我倒数数到三。” “三个。两个。一个!”我们叫道。 然后卡罗琳医生把热水倒进氮气桶里。 有一声响亮的噼啪声。 一片云飘到空中。 它太厚了,我甚至看不到我的手套。 “哦,看啊,看啊!”我叫道。 “液氮变成了气体。 太酷了!”戈特弗里德女士抛弃了奥巴马。 卡洛琳拿走了她的手机,这样她就可以从云后面开始拍摄了。 人群倒抽一口冷气,又喊又叫。
"That was beautiful," sighed Birdie. Kids and parents were out of their seats. The applause was super loud. "Nice job on the countdown, girls!" said Dr. Caroline. "What kind of change was that?" "A phase change!" I shouted. "That's right!" said Dr. Caroline. "The nitrogen molecules stayed the same, but the phase changed from liquid to gas." "Gas takes up more space than the liquid," I said, looking up as the clouds of vapor started to disappear. "Exactly," said Dr. Caroline. "The molecules are more separated. And when they move from gas to liquid, the molecules go from far apart to close together." "Just like when farm dogs herd sheep," added Birdie. "That's right! You guys are a great team," said Dr. Caroline. She glanced at her phone. "Guess what?! We definitely raised enough money to fund every kid's idea. And maybe a little to help out with the STEM Night next year." She pumped her arm into the air. Everyone cheered. Some people stomped on the floor with their feet.
“太美了,”小鸟叹道。 孩子们和家长们都离开了座位。 掌声非常响亮。 “姑娘们,倒计时做得不错!” 卡洛琳。“那是什么样的变化?”“相变!”我叫道。 “没错!”卡罗琳医生说。 “氮分子保持不变,但从液态变为气态。” “气体比液体占据更多的空间,”我说,抬头看着水汽云开始消失。 “没错,”卡罗琳医生说。 “分子更加分离。 当它们从气体变成液体时,分子从很远的地方靠近在一起。” “就像农场里的狗放羊一样,”伯迪补充道。 “没错!你们是一个伟大的团队。 卡洛琳。她瞥了一眼手机。 “你猜怎么着? !我们筹集了足够的资金来资助每个孩子的想法。 也许还能在明年的STEM之夜上帮点忙。” 她在空中挥舞着手臂。 每个人都欢呼起来。有些人用脚跺地板。
"Science is awesome," I said. "You can say that again," said Dr. Caroline. "Science is awesome!" we all cheered. Dr. Caroline shut down the fundraising app and put her phone in her lab coat pocket. "Thanks so much for having me here tonight, folks. Now go out and have more fun. There are tons of hands-on stations. Stay curious!" Since science was involved—that definitely wouldn't be a problem.
“科学是了不起的,”我说。 “你说得对。” 卡洛琳。“科学太棒了!”我们都欢呼起来。 卡洛琳博士关掉了筹款应用把手机放在了实验服口袋里。 “非常感谢各位今晚邀请我来到这里。 现在出去玩吧。 有大量的动手站。 保持好奇!”既然涉及到科学,那肯定不是问题。
