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)
Tangbao are one of the most internationally renowned delicacies, that win the hearts of both locals and tourists. Their charm lies in the paper-thin flour wrapper that needs to be folded evenly almost 20 times. Folding a tangbao requires skill to deal with a bulging filling and a thin wrapper. Tangbao are served in a bamboo steamer in which they are steamed, not only adding to the visual appearance, but ensuring they do not get cold before reaching the table. The best way to enjoy a tangbao is to dip it in a mixture of vinegar and soy sauce with
The Bank of Japan (BoJ) announced a seismic change in direction on March 19, hiking interest rates for the first time in 17 years. The move represents an unwinding of an ultra-loose — and maverick -- policy aimed at putting Japan’s “lost decades” of stagnation and deflation behind it. The last time the BoJ raised interest rates was in 2007, but its war against deflation began in earnest in 2013 under then-prime minister Shinzo Abe. “Abenomics” combined generous government spending and central bank monetary easing. The BoJ spent vast amounts on bonds and other assets to pump liquidity into the
Have you ever wished for an extra hour to prepare for exams or finish homework? In some countries, people actually adjust their clocks to gain or lose an hour, all for the sake of Daylight Saving Time (DST). Specifically, clocks are set forward by an hour in March and then set back in November. One of the primary reasons for implementing DST is to make better use of natural daylight so that people can reduce energy consumption. The concept originated with Benjamin Franklin in 1784 and became widely adopted during World War I. Today, this system is in place
For the first time, the US Federal Communications Commission (FCC) has fined a company for improper disposal of its defunct satellite. The satellite cable company Dish Network was fined US$150,000 because it failed to move an old satellite that was no longer in operation to a safe distance from others currently being used. The FCC had asked Dish Network to move one of its older satellites, EchoStar-7, 186 miles further from the Earth. However, the satellite had only advanced 76 miles before it ran out of fuel at the end of its operational life in 2022.