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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