歡迎閱讀《週日科學版》！我們每週日都要為你介紹可以在家中進行的有趣科學實驗。你可以在《科學日誌》中記錄自己做了哪些活動，這樣就可以將所學的紀錄下來，比較這些結果，也許還可以利用它們來設計新的實驗！先看一下《科學日誌》的點子再開始吧。展開實驗之前，記得要獲得大人許可喔！
Have you ever wondered if plants lose water from their leaves? This week we're going to do an experiment to find out.
What you will need:
Various kinds of leafy plants
PHOTO: MICHAEL KEARNEY, TAIPEI TIMES
Small plastic bags or ziplock bags
Tape (optional)
▲ Before you start, note that this works best on plants exposed to the sun.
▲ Put a plastic bag around one leaf on each plant. Close the bag in such a way that water won't be able to easily escape. Be careful not to crush the stem of the leaf.
▲ Close another bag and leave it to one side. This is your control.
▲ Periodically take a look at the bags. Note how much moisture appears in each of the bags.
▲ After a couple hours, take the bags off the plants and record your observations.
(MICHAEL KEARNEY, STAFF WRITER)
你是否曾想過植物內的水分會不會從它們的葉子流失呢？這個星期，我們將要做實驗來驗證。
所需材料︰
各類多葉植物
小塑膠袋或是封口袋
膠帶（可有可無）
▲實驗以前，請注意：如果將植物暴露在陽光下，實驗效果會最好。
▲將塑膠袋套在每一株植物的其中一片葉子上，然後將袋口封好，讓水氣不容易跑掉。請小心不要把葉柄給壓壞了。
▲將另一個塑膠袋也封好，然後放置一旁，作為對照組。
▲定期觀察這些塑膠袋，注意每一個袋子有多少水氣出現。
▲數小時後，將塑膠袋從植物上拿下來，並記錄所觀察到的現象。
（翻譯︰楊鴻泰）
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