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Layers 液體的層次
By Catherine Thomas
STAFF WRITER
Sunday, Jul 29, 2007,Page 14
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PHOTO: CATHERINE THOMAS, TAIPEI TIMES
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This experiment can be a little messy, so be sure to wear suitable clothes and prepare the area well.
What you will need:
Some oil
A cork
A coin (a NT$1 or other small coin is best - it must fit in the neck of the bottle)
Water
Food coloring (optional)
Two grapes (unpeeled)
Some honey (corn syrup will work too)
An empty water bottle
A funnel (if you don't have one at home, you can make one from cardboard covered with tinfoil or use a pouring jug to add the ingredients)
Some old newspaper or a tray
- Lay out the newspaper or the tray to protect the area you are working in.
- If you are using food coloring, add it to the water (it will help you identify the water easily).
- Unscrew the lid from the empty bottle and place the funnel in the neck of the bottle.
- Use the same volume of each liquid.
- Carefully pour in enough honey to fill a third of the bottle.
- Carefully pour in enough oil to fill the next third of the bottle.
- Pour in water to the last third of the bottle.
- Wait for the three liquids to settle.
- Now drop in the coin, an unpeeled grape and the cork.
實驗過程可能會弄得髒兮兮的，所以一定要穿著適當的衣服，做好準備工作喔！
所需材料︰
少許食用油
一只軟木塞
一枚硬幣（新台幣一元或是更小的硬幣為佳，必須可放入瓶內）
水
食用色素（非必要）
兩顆葡萄（請撥皮）
蜂蜜（玉米糖漿也可以）
一個空水瓶
一個漏斗（假如家裡沒有漏斗，你也可以用錫箔紙包著厚紙板自己做一個，或是用有傾倒口的量杯來添加材料）
舊報紙或一只托盤
- 在工作檯面舖上報紙或放置托盤，來保護工作區。
- 假如你想用食用色素，把色素加入水中（可以幫你更容易分辨出水來）。
- 把空水瓶的蓋子轉開，再將漏斗架在瓶口。
- 每一種液體的用量都要相同。
-小心將蜂蜜倒入瓶內三分之一的地方。
-小心倒入食用油，到瓶子三分之二處。
-最後再倒入水，填滿剩下的三分之一。
- 等待三種液體沉澱。
- 最後再丟入硬幣、一顆未剝皮的葡萄與軟木塞。
（翻譯︰賴美君）
| What's the science- 科學原理 |
| It is all about density. Density is equal to mass/volume. The most dense liquid will sit at the bottom. The second densest liquid sits in the middle, and the least dense one stays at the top. Items settle on the first layer that is more dense than they are and under layers that are less dense than they are. If an item sits on the bottom, it is more dense than all the liquids.
這個實驗跟物質的密度有關。密度就是質量除以體積。密度最大的液體會沉入瓶底，密度第二大的液體會居於中層，密度最小的則會浮在上面。物品浮在第一層時，表示第一層液體的密度比這些物品大。物品浮在二、三層時，表示二、三層液體的密度比這些物品小。假如物品沉入瓶底，表示它的密度比這三種液體大。
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| Science Journal 科學日誌 |
| What do you know about water, oil and honey? Which do you think is thicker? Heavier? Which one is slowest to pour? Do you think that oil and water will mix together? What about oil and honey? What about the grape, cork and coin? Which one do you think is heaviest? Lightest? Do they float in water? What about the honey or the oil?
你對水、食用油與蜂蜜了解多少?你認為哪一種比較黏稠?哪一種比較重?哪一種最不容易傾倒?你認為食用油會和水溶在一起嗎?食用油和蜂蜜呢?至於葡萄、軟木塞和硬幣，你認為哪一種最重?哪一種最輕?它們會浮在水中嗎?還是浮在蜂蜜或食用油之中呢? |
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| Vocabulary 今日單字 |
1. suitable adj.
適合的 (shi4 he2 de5)
2. identify v.i./v.t.
分辨 (fen1 bian4)
3. volume n.
體積 (ti3 ji1)
4. rest v.i./v.t.
停留 (ting2 liu2)
5. density n.
密度 (mi4 du4)
6. mass n. phr.
質量(zhi2 liang4)
7. Archimedes n.
阿基米德 (a1 ji1 mi3 de2)
8. measure v.i./v.t
測量 (ce4 liang2)
9. irregular adj.
不規則的 (bu4 gui1 ze2 de5)
10. naked adj.
裸體的 (luo2 ti3 de5)
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