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)
In Taiwan, a quick stop at a local convenience store allows you to grab a hot dog whenever you want. But have you ever wondered how this popular snack got its unique name and became a leading light of American cuisine? First, the name “hot dog” is actually a combination of different ideas. Vendors called the sausages “red hot” to get customers to buy one fresh off their grills. As for the “dog” part, it’s a playful joke to compare the meat of the sausage to that of a dog—specifically , a dachshund. This small, long dog breed was
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A: Entertainer Mickey Huang’s #MeToo scandal has kept snowballing. B: Didn’t Huang just escape prosecution on several sexual misconduct charges due to a lack of evidence? A: He has now been accused of raping a woman identified as "Miss K." B: It’s like one trouble follows another! A: His decent “persona” in the showbiz has totally collapsed. A: 藝人黃子佼的#MeToo事件真是沒完沒了。 B: 他的性騷擾案不是因為證據不足獲得不起訴? A: 但他又被某位「K小姐」指控性侵。 B: 天啊,真是一波未平,一波又起! A: 他在娛樂圈的優質「人設」都崩壞啦。 (By Eddy Chang, Taipei Times/台北時報張聖恩)
Jumping rope has long been considered an excellent form of exercise. It not only burns calories but also improves cardiovascular health and __1__ core muscles. Anyone who has used a traditional jump rope, though, knows that it requires a certain level of skill and coordination. However, with the development of the cordless jump rope, this is __2__ the case. The cordless jump rope is an innovation in the fitness industry that has gained popularity in recent years. As its name suggests, it doesn’t have a cord connecting the two handles. Instead, each handle features a short cord with a