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Sunday Science: Ziplock bombs 週日科學:夾鏈袋炸彈
It's time for some fun! This week we're going to make wicked ziplock bombs. You'll need to find a safe place to do this. It's probably best done outside. 該是來點娛樂的時候了！這個星期我們要用夾鏈袋來製作炸彈。你需要找一個安全的地方來做這個實驗，室外可能是最好的選擇。
By Catherine Thomas
STAFF WRITER
Sunday, Oct 21, 2007,Page 14
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Ziplock bombs
PHOTO: CATHERINE THOMAS, TAIPEI TIMES
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What you will need:
Some ziplock bags
Vinegar
Warm water
Sodium bicarbonate
Some paper towels or tissue.
A tablespoon
Sunglasses (to protect your eyes)
A bucket or large bottle of water (for cleaning up)
- Check the ziplock bag for holes or leaks (you can do this by putting a cup of water in the bag, sealing it and swishing it around).
- Lay out a paper towel (if you are using tissue, use a double layer) on a flat surface.
- Put one and a half tablespoons of sodium bicarbonate in the center of the paper towel.
- Fold the paper towel to make an envelope or package of sodium bicarbonate.
- Add vinegar and warm water to the ziplock bag at a ratio of 2:1 (two parts vinegar to one part warm water). The amount you use depends on the size of your ziplock bag. The bag should be about half full.
- Very carefully, using the top of the ziplock bag, hold the sodium bicarbonate package in the bag, but out of the water and vinegar (see the picture).
- Keeping the package out of the water and vinegar, seal the bag tightly.
- Your bomb is ready to go. Place it on the floor, releasing the package, and stand well back!
- Don't go back to the bomb if it seems to be taking a little while. If you do, it's sure to go off just as you're standing over it!
- Make sure that you clean up after yourself. Rinse down the area and pick up the busted bag and dispose of it properly.
所需材料︰
一些夾鏈袋
醋
溫水
碳酸氫鈉
一些紙巾或面紙
一個大湯匙
墨鏡 (用來保護你的眼睛)
一個水桶或是一大瓶清水 (清潔用)
- 檢查夾鏈袋是否有破洞或漏水現象（你可以倒一杯水到夾鏈袋裡，把袋口封好，然後搖晃一下測試）。
- 將一張紙巾平舖在平坦的地方（如果你使用的是面紙，請舖兩層）。
- 在紙巾的中央放一大匙半的碳酸氫鈉。
- 將紙巾折成信封狀，做成碳酸氫納包。
- 在夾鏈袋裡加入二比一的醋和溫水（兩等份的醋對上一等份的溫水）。醋和溫水加入的量依照你夾鏈袋的大小來決定，基本上需要將夾鏈袋裝至半滿。
- 非常小心地將碳酸氫納包抓握在夾鏈袋內的上方處，不要讓它碰到水和醋（如圖示）。
- 將夾鏈袋密封好，持續握住碳酸氫納包，不要讓它碰到水和醋。
- 你的炸彈差不多完成了。將它放到地上，放開碳酸氫納包，然後站得遠遠的！
- 如果它似乎需要一段時間反應，別走回去炸彈的地方。因為如果你走回去的話，炸彈一定會在你站在它上方時爆開。
- 事後務必將現場清理乾淨。用水沖洗一下地面，撿起破碎的夾鏈袋，然後適當處理它。（翻譯：楊鴻泰）
What's the Science? 科學原理
The paper towel or tissue helps delay the reaction so that you have time to stand back from your bomb. When the vinegar and warm water mix get in contact with the sodium bicarbonate, the vinegar, which is an acid, reacts to the sodium bicarbonate, which is an alkaline. The reaction makes carbon dioxide. The bag explodes when it can't hold anymore carbon dioxide.
紙巾或面紙是用來幫助減緩反應作用，這樣你才有時間站離你做的炸彈。醋和溫水的混合液接觸到碳酸氫納時，由於醋是酸性的，它會和鹼性的碳酸氫納發生作用。這個反應過程會製造出二氧化碳，因此當夾鏈袋無法再承受更多二氧化碳時，就會爆開來。
Science Journal 科學日誌
What do you know about vinegar? Is it an acid or an alkaline? How does vinegar react with water? What do you know about sodium bicarbonate? Is it an acid or an alkaline? How do you think sodium bicarbonate and vinegar will react? What if you add some heat (warm water)?
你對醋了解多少？它是酸性還是鹼性的？醋和水會產生什麼作用？你對碳酸氫納認識多少？它是酸性還是鹼性的？你覺得碳酸氫納和醋加在一起會有何反應？如果你把溫度提高（加入溫水），又會發生什麼事情？
| Vocabulary 今日單字 |
| 1. ziplock n.
夾鏈 (jia2 lian4)
2. bomb n.
炸彈 (zha4 dan4)
3. leak n.
漏出 (lou4 chu1)
4. swish v.t.
揮動 (hui1 dong4)
5. ratio n.
比例 (bi3 li4)
6. seal v.t.
密封 (mi4 feng1)
7. busted adj.
破碎的 (po4 sui4 de5)
8. dispose v.i./v.t.
處理 (chu3 li3)
9. contact n.
接觸 (jie1 chu4)
10. explode v.t/v.i.
爆炸 (bao4 zha4)
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