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豆子里都有啥?

What's Inside a Bean? - #sciencegoals

种子是神奇的
Seeds are amazing.
尽管它们通常都很小 但是它们体内有植物
Even though they’re usually pretty small, on the inside they have everything a plant
生长所需的全部物质
needs to start growing.
一颗小小的种子可以长成盆栽 灌木 甚至是参天大树
Just one tiny little seed can grow into a house plant, a bush, or even a huge tree!
今天 我们将来看一看一种特殊的种子里面都有什么 这种种子
Today, we’re going to look inside a special kind of plant seed, one that you’ve probably
你们甚至以前都吃过哦 豆子
even eaten before: a bean!
就是它
That’s right!
豆子是种子
Beans are seeds!
像其他种子一样 豆子也是从植物的花中结出来的 当然了 是豆类植物
Like other seeds, beans come from the flowers on a plant — in this case, bean plants.
豆类或许看起来不像小小的花的种子或是坚硬的西瓜种子 但是
Beans may not look like tiny little flower seeds, or like hard watermelon seeds, but
无论是多大的种子 形状都是一模一样的
seeds come in all shapes in sizes!
实际上 如果你种一些你在厨房里找到的干燥的种子的话 他们可能
In fact, if you planted some dry beans like the kind you find in your kitchen, they might
会长成豆类植物
even grow into bean plants.
种子中有供养植物生长的全部物质 但是许多
A seed has everything inside of it that a tiny plant needs to get started, but a lot
种子不适合观察其内部 因为它们要么太小了 要么太坚硬了
of seeds are too small or hard for you to be able to look inside and see for yourself.
但是豆类却不是如此
Not beans, though!
因为它们既美观又大 你可以观察内部来了解它
Since they’re nice and big, you can look inside and see how a seed works!
为了完成这个实验 你只需准备一个大一点的干燥豆类 比如四季豆或者
For this experiment, all you’ll need is a large dry bean, like a kidney bean or a
黑白斑豆 一杯水 还有少许时间
pinto bean, a cup of water, and some time!
你要是想看清豆类的内部 你必须软化它们
Before you can see inside the bean, you’ll have to soften it up.
当豆类没有被种植的时候 它们会变的干燥 表皮变得坚硬
When beans aren’t planted, they dry up and the outside of the seed gets really hard to
以便保护内部娇嫩的植物
protect the tiny plant inside.
但是想要软化豆类也是很简单的 你只需要把它放入水中浸泡一天
But it’s easy to soften your bean: all you have to do is put it in water for a day or
或者两天
two.
然后 豆类的外皮也就是种皮就会变的足够柔软了
After that, the outside of the bean, which is called the seed coat, should be soft enough
这样就能打开了
to open.
打开之前 注意看一下种皮上不同颜色的地方
Before you open it, though, take look at this spot where the seed coat is a different color.
豆类的这一部分有其特殊的名字
That part of the bean has its own special name.
这一部分叫做种脐 是种子与母体植物相连的地方
It’s called the hilum, and it’s where the seed was attached to its parent plant.
基本上可以说他是豆类的胃部按钮
It’s basically the bean’s belly button!
好啦 现在让我们来开始打开豆类
Okay, now let’s open up the bean!
它应该是很容易被分开的 但是你也可以找一个成年人来
It should separate in half pretty easily, but you can also ask a grown-up to cut it
帮你打开
for you.
打开啦 Squeaks
That’s true, Squeaks!
长在这里的小东西是为了照顾幼小的植株的
That little thing poking out there does sort of look like a tiny plant, and that’s exactly
就是它
what it is!
它叫做胚芽
It’s called the embryo.
如果你把这个种子种在地里 胚芽将穿破种皮
If you planted this bean in the ground, the embryo would poke out of the seed coat and
从土壤中长成一株新的植物
grow up and out of the ground and into a new bean plant!
你应该也能看到胚芽上长的小叶子
You might even be able to see tiny little leaves on the embryo.
随着食物的生长 这些小叶子会变绿 帮助食物收集阳光
As a plant grows, these leaves turn green and help the plant collect the sunlight it
这是用于制作养分的
uses to make food.
豆类的其他部分就是由这种白色的固体物质组成的 它有一个搞笑的名字
The rest of the bean is made up of this solid white stuff, and it has a funny name: it’s
叫做子叶
called the cotyledon.
子叶用来储存植物养分
The cotyledon is basically stored-up plant food.
它给胚芽提供首次生长所需要的养分
It’s what the embryo will use for energy when it first starts to grow.
如果植物长的更大一点 它将会用叶子和根部来吸收它所必需的阳光
Once the plant gets bigger, it’ll use its leaves and roots to collect the sunlight and
和水分
water it needs to survive.
但是在一开始 需要一点点能量来供根部和叶子
But first, it needs a little energy to grow big enough for its roots and leaves to take
来长大
over.
所以子叶给胚芽提供其生长所需的能量
So the cotyledon gives the embryo the little boost it needs.
当你食用豆类的时候 它也给你提供了能量
When you eat a bean, your body also uses the cotyledon to give you energy!
所以豆类可能看起来小小的 很简单
So a bean may seem small and simple.
但是实际上它有许多不同的部分来帮助它
But it’s really a seed, with lots of different parts that are meant to help it grow into
长成一株强壮的植物
a strong plant!
谈论豆类都让我饿了 你呢 Squeaks
All this talk about beans is making me pretty hungry… how about you, Squeaks?
[吱吱声]
(Squeaks squeaks)
啊啊啊
Ahh!
我们来做一大盆辣椒吧
Well, let’s go make a big pot of chili!
[吱吱声]
(Squeaks squeaks)
你还有什么关于豆类 种子或者植物的问题么
Do you have any questions about beans, seeds, or plants?
或者你想跟我们分享一下你漂亮的花园照片?
Or maybe you have pictures of your own awesome garden you’d like to share with us?
可以找一个成年人帮助你在下方留言或者给我们发电子邮件 地址是kids@scishow.com
Grab a grownup to help you leave a comment below, or email us at kids@scishow.com!
由衷感谢谷歌科技对于本期节目的支持
And a big thanks to Google Making Science for helping us make this episode!
感谢您今日的观看 期待下次再见
Thanks for hanging out with us today, and we’ll see you next time here at the Fort!

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视频概述

通过指导孩子们打开豆子的表面观察其内部结构 了解豆子的生长规律 让孩子们从动手中学会知识

听录译者

收集自网络

翻译译者

风吹桃

审核员

vicky

视频来源

https://www.youtube.com/watch?v=UFmBKpQxf-U

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