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Doyouknowsomethingabouttreerings?Doyouknowtheycantelluswhattheweatherwaslike,sometime...
Do you know something about tree rings?Do you know they can tell us what the weather was like,sometimes even hundreds of years ago?
A tree will grow well in a climate with lots of sunsgine and rain fall.And little sunshine or rainfall will limit the growth of a tree.We can see the change of climate by studying the tree rings.For example,to find out the weather of ten years ago,we can count rings of a tree from the outside to the inside.If the tenth ring is far from the eleventh ring,then we’re sure that it was sunny and raniny most of that year,If it is near to the eleventh ring,then we’re sure that it was sunny and rainy most of that year.If it is near to the eleventh ring,then the climate that year was bad.
A scientist studied the rings of dead trees there,he found that the people had to leave bacause they had cut down all the trees to make fires and building.As all the trees had gone,the people there had to move. 展开
A tree will grow well in a climate with lots of sunsgine and rain fall.And little sunshine or rainfall will limit the growth of a tree.We can see the change of climate by studying the tree rings.For example,to find out the weather of ten years ago,we can count rings of a tree from the outside to the inside.If the tenth ring is far from the eleventh ring,then we’re sure that it was sunny and raniny most of that year,If it is near to the eleventh ring,then we’re sure that it was sunny and rainy most of that year.If it is near to the eleventh ring,then the climate that year was bad.
A scientist studied the rings of dead trees there,he found that the people had to leave bacause they had cut down all the trees to make fires and building.As all the trees had gone,the people there had to move. 展开
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你知道树的年轮吗?你知道他们可以告诉我们天气怎样,有时甚至是几百年前的吗?
一棵树在阳光和雨水充足的气候中将会长得很好。而且少的可怜的阳光和雨水将会允许树的生长余判。通过研究乱明年轮,我们可以看出气候的变化。例如,要找出十年前的天气,我们可以从外向内数树的年轮。如果第十个年轮离第十一个很远,那么我们可以确定当时的天气阳光充足,大部分哗毁告时间也有雨水。如果离第十一个年轮很近,那么那年的气候很坏。
一个科学家研究了这里的死树的年轮,他发现人们不得不离开,因为他们为了生火和盖房子已经砍倒了所有的树。因为所有的树都死了,那里的人们不得不迁移。
累死我了~呵呵
一棵树在阳光和雨水充足的气候中将会长得很好。而且少的可怜的阳光和雨水将会允许树的生长余判。通过研究乱明年轮,我们可以看出气候的变化。例如,要找出十年前的天气,我们可以从外向内数树的年轮。如果第十个年轮离第十一个很远,那么我们可以确定当时的天气阳光充足,大部分哗毁告时间也有雨水。如果离第十一个年轮很近,那么那年的气候很坏。
一个科学家研究了这里的死树的年轮,他发现人们不得不离开,因为他们为了生火和盖房子已经砍倒了所有的树。因为所有的树都死了,那里的人们不得不迁移。
累死我了~呵呵
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