简介
准备迎接高高喷起的水柱吧，因为这个实验能让汽水像火箭喷泉一样冲上天空。
它看起来很神奇，也能教你一个真正的科学概念。
原理说明
汽水里溶解了二氧化碳气体。曼妥思表面有很多细小凹凸，给气体提供了大量同时逃出的地方，这个过程叫成核，所以汽水会一下子冲出来。健怡可乐通常比普通可乐效果更好，因为它含糖更少、液体也没有那么黏，气泡更容易快速向上冲，形成更高的喷泉。
分步说明
- 1
到车道或院子这样的空旷户外区域，并戴上护目镜。
- 2
把汽水瓶放在平坦地面上，确保不会倒下。
- 3
打开瓶盖，并尽快准备好曼妥思。
- 4
把5到6颗曼妥思叠在纸筒里，或用一张卡片托在瓶口上方。
- 5
抽走卡片，让所有曼妥思同时掉进去。
- 6
立刻后退，观察汽水喷泉冲向空中。
- 7
讨论刚才发生了什么，并测量哪种汽水或多少颗曼妥思能喷得最高。
Science Fair Setup: Hypothesis, Variables, and Data
Turn the Coke and Mentos geyser into a science project by changing one thing at a time and measuring the result. A sample hypothesis could be: if more Mentos are dropped into the soda at once, then the geyser height will increase because more carbon dioxide bubbles can form quickly.
- Independent variable
- The one thing you change, such as soda type, candy count, temperature, or bottle size.
- Dependent variable
- What you measure, usually geyser height, launch time, or how much soda remains.
- Controlled variables
- Everything you keep the same, such as the drop method, outdoor location, starting soda amount, and measurement tool.
Comparison tests to try
Different soda types, such as Diet Coke, cola, lemon-lime soda, and sparkling water
Number of Mentos candies dropped at once
Soda temperature: cold, room temperature, or warm outdoor shade
Bottle size, such as 16-ounce, 1-liter, and 2-liter bottles
Launch height measured against a wall, meter stick, or marked poster board
| Trial | Variable tested | Geyser height | Notes |
|---|---|---|---|
| 1 | _____ | _____ | _____ |
| 2 | _____ | _____ | _____ |
| 3 | _____ | _____ | _____ |
Safety note: run every trial outdoors, wear goggles, stand back immediately, and never point the bottle toward people, windows, cars, or pets.