世外之星｜Science King 科学云课堂第二十四期

电能是当今世界人类应用最广泛的能源。电能的获得可以通过各种其他形式的能转化而来，比如机械能、光能、热能、声能、核能和化学能等，而这些能的转化需要用到发电机和各种电池来完成。那么你听过水果也能发电吗？本周，我们邀请到了5B班的王祎和席徐宽两位Science King科学实验员，为大家呈现了有趣的水果电池！ 接下来，让我们一起看看实验员们是如何变让水果产生电的吧！

Electricity is the most widely used form of energy by humans in today’s world. It can be obtained by converting various other forms of energy, such as mechanical energy, light energy, heat energy, sound energy, nuclear energy, and chemical energy. The conversion of these forms of energy requires generators and various types of batteries. But have you ever heard that fruit can generate electricity too? This week, we invited two Science King experimenters from Class 5B, Wang Yi and Xi Xukuan, to present an interesting fruit battery experiment for everyone! Now, let's take a look at how these experimenters make electricity from fruit!

哇！小实验员们通过简单的实验不仅让我们感受了水果的“威力”。还了解水果电池的电原来通过化学能转化而来的！他们的演示实验新奇、有趣、易懂！原来一些水果通过简单的操作就可以成为一个“有机电池”。孩子们，你们也赶紧跟着一起做起来吧！

Wow! Through a simple experiment, the young experimenters not only showed us the "power" of fruit, but also explained how the electricity from fruit is actually generated by converting chemical energy! Their demonstration was novel, fun, and easy to understand. It turns out that some fruits can become an "organic battery" with just a few simple steps. Kids, go ahead and try it out for yourself!

一、实验准备

    消失的硬币：桔子、锌片、铜片、导线、二极管和电子表。

1. Experiment Preparation

Disappearing Coin: You’ll need an orange, a zinc plate, a copper plate, wires, a diode, and a digital clock.

二、实验步骤（参照视频中的制作过程）

    第一步：用导线将一片锌片和一片铜片连接成一组；

    第二步：分别将铜片和锌片插入桔子中，稍微靠近一点，但不能直接接触；

    第三步：将二极管或者电子表接入电路中，观察实验现象。

2. Experiment Steps (Refer to the video for details)

  1. Connect a zinc plate and a copper plate together using a wire to form a set.

   2. Insert the copper plate and zinc plate into the orange, positioning them close to each other but without making direct contact.

   3. Connect the diode or digital clock to the circuit and observe the results.

三、实验原理

水果之所以能发电，其实是将水果中的化学能转为电能，其原理首先是像桔子、柠檬、苹果等水果中含有大量水果酸，这是一种很好的电解质;其次，插入水果中的两个金属片化学活性是不一样的，其中更活泼的金属片能置换出水果中酸性物质的氢离子，可以产生电荷，造成电压的改变，于是便形成一个原电池。水果电池中铜片相当于电池的正极，锌作为负极。

 3. Experiment Principle

The reason fruit can generate electricity is that it converts the chemical energy in the fruit into electrical energy. The principle behind this is that fruits like oranges, lemons, and apples contain a large amount of fruit acids, which are excellent electrolytes. Additionally, the two metal plates inserted into the fruit have different chemical reactivities. The more reactive metal plate can displace hydrogen ions from the acidic substances in the fruit, producing a charge and causing a voltage change, thus forming a simple battery. In the fruit battery, the copper plate acts as the positive electrode, and the zinc plate serves as the negative electrode.

四、小任务

    看完这个实验，你对水果电池有所了解了吗？请试着一起来做一做吧！当然你也可以实践关于能量的其他小实验！请把你的实践操作通过以下方式分享给我们大家哦！

 4. A Small Task

After watching this experiment, do you understand how a fruit battery works now? Try doing it yourself! Of course, you can also experiment with other small energy-related projects. Please share your experiments with us in the following ways:

1. 录制实验视频，发送至邮箱hwflscienceking@126.com或钉钉发送给本班科学老师。实验视频包括材料准备、实验过程、介绍原理等部分，实验视频以班级+姓名+作品名称进行命名。

1. Record a video of your experiment and send it to hwflscienceking@126.com or via DingTalk to your science teacher. The video should include the preparation of materials, the experiment process, and an explanation of the principle. Please name your video with your class, name, and the title of your work.

2.科学老师会根据邮箱内收到的视频资料，经一学期的积累，学期末将评选属于世外的HWFL Science King实验小达人，颁发奖状，优秀作品还可参加省级科学影像项目竞赛，快快行动起来吧！

2. The science teachers will review the videos received via email, and by the end of the semester, they will select the HWFL Science King experiment stars, awarding certificates. Outstanding works may also participate in provincial scientific video competitions. So, hurry up and get started!