评论
打印
Welcome to the Britannica Kids Activities Corner.
欢迎来到大英百科全书儿童活动角。
Today in the Britannica Kids Lab, we're going to explore how plants absorb and transfer water.
今天，在大英百科全书儿童实验室，我们将探索植物如何吸收和传输水分。
Most plants get the majority of their water from the ground, even the tallest trees.
大多数植物的水分主要来自地下，即使是最高的树也是如此。
That water makes its way up to their leaves.
水会流到它们的叶子上。
But how does it get all the way up there?
但它是如何一路走到那里的呢？
Using a phenomenon called "capillary action," plants take up water sort of like drinking through a straw.
利用一种被称为“毛细血管作用”的现象，植物吸收水分有点像用吸管喝水。
We're going to observe this effect using a common crunchy snack -- celery.
我们将使用一种常见的脆食物--芹菜来观察这种效果。
Here are the materials you will need: A tall glass, water, a measuring cup, a stalk of leafy celery -- the leafier the better -- some food coloring -- blue or red work best -- and a knife or scissors.
这些是你需要的材料：一个高高的玻璃杯，水，一个量杯，一根带叶芹菜茎--叶子越多越好--一些食用色素--蓝色或红色效果最好--还有一把刀或剪刀。
Ask an adult to use the knife.
请成年人使用这把刀。
First, measure out half a cup of water and add it to the glass.
首先，量出半杯水，加到玻璃杯里。
Add about 20 drops of food coloring to the water.
在水中加入大约20滴食用色素。
Next, cut the end of the celery stalk to make a fresh edge.
接下来，切掉芹菜茎的末端，做一个新鲜的切面。
Put the celery stalk into the glass with the cut side in the water.
将芹菜梗放入玻璃杯中，切好的一面放入水中。
You can use the celery to stir the water so it mixes with the food coloring.
你可以用芹菜搅拌水，使其与食用色素混合。
Leave your celery in the glass for a day or two and observe it often.
把你的芹菜放在玻璃杯里一两天，并经常观察。
What happens?
会发生什么？
You should see color coming up into the leaves of your celery.
你应该看到颜色进入芹菜的叶子。
Have an adult cut into the celery so you can see how the colored water has traveled.
让一个成年人把芹菜切开，这样你就可以看到彩色的水是如何流动的。
You can also try this with white flowers.
你也可以用白色的花试一试。
What do you think will happen?
你认为会发生什么？
See if you can make some predictions and test them.
看看你是否能做出一些预测，并对其进行检验。
Visit Britannica Kids on the web, or contact us on Facebook or Twitter to let us know how your experiments went.
在网上访问大英儿童，或在Facebook或Twitter上联系我们，让我们了解您的实验进展情况。
Stay curious.
保持好奇心。
