This week we're going to make a paper dragonfly and a paper airplane. We're going to use these to demonstrate how helicopters, planes and even most birds are able to fly!
本週我們要來做紙竹蜻蜓和紙飛機，我們要利用這個機會來說明直昇機、飛機，甚至大多數鳥類的飛行原理！
What you will need:
Paper
Scissors
A paperclip
To make the paper airplane:
★ Take a look at the picture below. Fold a piece of paper in half lengthwise to make a center crease.
★ Unfold the paper. Fold the two upper corners of the paper to the center crease, and then fold the folded corners to the center crease.
★ Fold the paper in half again lengthwise, and then fold the two wings down.
To make the paper dragonfly:
★ Take a look at the picture to the right. You need to copy it on to a piece of paper. You can make it bigger if you like. Cut along the dotted lines and fold along the solid lines. First fold A and B down in different directions to make the paper dragonfly's blades. Next fold C and D over in opposite directions, and then fold E up and attach a paperclip to make a stable base.
Don't forget to record what happens in your Science Journal.
(MICHAEL KEARNEY, STAFF WRITER)
所需材料︰
紙
剪刀
迴紋針
紙飛機的製作步驟：
★ 參照下方圖示。將長方形紙「直立」對摺，中央會出現一條摺痕。
★ 把紙攤開，將上面兩個紙角摺向中央線，然後再將摺出來的折角摺向中央線。
★ 再把紙縱向對摺一次，然後把摺起的兩個機翼放下。
紙竹蜻蜓的製作步驟：
★ 參考右側圖示。你必須把圖示複印到一張紙上，你可以依個人喜好放大，然後沿著虛線剪開，再沿實線摺疊；先將A和B處朝不同方向摺下，做成紙竹蜻蜓的槳翼，然後將C和D處反摺交疊，最後將E處向上折起，再用一根迴紋針固定基底即可。
別忘了把結果記錄在《科學日誌》中。
（翻譯︰袁星塵）
What do you know about flight? Have you ever heard of Bernoulli's principle? The explanation in the "what's the science?" section isn't the whole story. Try searching the Internet for more information about how planes are able to fly.
你對飛行了解多少？你曾聽過「柏努利定律」嗎？今天的「科學原理」並沒有講解得太細，你可以到網路上搜尋更多飛機飛行原理的資料。
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