77 Why Do Leaves Change Color?So Many ColorsWhy are leaves on trees di
fferent colors? What makes them change color?Making FoodLeaves ma
ke food for the tree from sunlight, water, and air. Green stuff i
n the leaves helps them make food. It also makes the leaves green
.SummerLeaves are green in summer because they are making food. T
he tree saves some of the food for winter.FallIn fall, the weathe
r changes. The days get shorter, and the nights get longer. Trees
get less sunlight, so they make less food.The leaves stop making
the green color. Other colors that were under the green start to
show.Leaves turn yellow, orange, brown, and red.WinterTrees drop
their leaves to get ready for winter. They use the food they sav
ed to get through the cold days and nights.SpringSpring comes. Ic
e and snow melt, and rain falls. The Sun shines. New leaves grow
on the trees.The green leaves start making food again.77 Why Do L
eaves Change Color?阅读时间10分钟秋天,大自然的叶子五彩缤纷,令人眼花缭乱。为什么树叶会变色?这本书 解释了这
一惊人转变背后的科学。可爱的照片强调树木和树叶的美丽,插图 有助于澄清科学概念。除了教授孩子有关植物和光合作用的知识,这本书还 让
他们有机会学习因果和介词。So Many ColorsWhy are leaves on trees different colo
rs? What makes them change color?这么多颜色为什么树上的颜色不同?是什么让它们 改变颜色?Maki
ng FoodLeaves make food for the tree from sunlight, water, and ai
r. Green stuff in the leaves helps them make food. It also makes
the leaves green.制作养分叶子从阳光,水和空气中为树木制作养分。叶子里的绿色东西可以帮助它们制 作养分。它还使叶子
变绿。Summer夏季Leaves are green in summer because they are making foo
d. The tree saves some of the food for winter.夏天叶子是绿色的,因为它们正在制作 养
分。树为冬天存储了一些养料。FallIn fall, the weather changes. The days get shor
ter, and the nights get longer. Trees get less sunlight, so they
make less food.秋季秋天,天气变化。白天越来越短,夜晚 越来越长。树木能获得的阳光越来越少 ,所以它们制作的养分就越
少。The leaves stop making the green color. Other colors that were
under the green start to show.叶子停止变绿。绿色之下的其他颜色开 始出现。Leaves turn y
ellow, orange, brown, and red.叶子变成黄色,橙色,棕色和红色。Winter冬季Trees drop
their leaves to get ready for winter. They use the food they save
d to get through the cold days and nights.树落下它们的叶子为冬天做准备。它们 用储备的养
分来度过寒冷的白天和黑夜SpringSpring comes. Ice and snow melt, and rain falls
. The Sun shines. New leaves grow on the trees.春天春天来了。冰雪融化，雨水落下。阳
光 普照。新的叶子长在树上。The green leaves start making food again.绿叶又开始制造养分了
。Reading A-ZLEVEL-GQuick Check77 Why Do Leaves Change Color?1. Wh
y do leaves change colors in the fall?A. They collect less sunlig
ht.B.They are making more food.C. They are growing new leaves.2.
What is the effect of trees receiving less sunlight?A. Trees make
less food.B.Trees drop their leaves.C. Trees grow new leaves.3.
What does the picture on page 5 help readers to understand about
how a leaf makes food?A.It shows how a leaf changes color in the
fall.B. It shows the amount of food a leaf makes in a year.C. It
shows how the leaf collects sunlight, water, and air.4. Why did t
he author write this book?A. to entertainB. to informC. to persua
de5. Listen to this sentence: The leaves change color in the fal.
The word change means to becomeA. differentB. greenC. smarter6.
Extended Response: Have the student write (or dictate) two detail
s from the book that are facts and an explanation of how the fact
s could be proved. Then, have the student write (or dictate) one
opinion about trees or leaves, and explain how he or she knows it
is an opinion.77为什么树叶会变色？1.为什么秋天树叶会变色？他们收集的阳光较少。他们正在做更多的食物。他们正在长
新叶子。2.树木接受较少的阳光会产生什么影响？树木制造的食物更少。树木落叶。树木长出新叶子。3.第5页的图片有助于读者理解树叶是如
何制造食物的？它显示了树叶在秋天是如何变色的。它显示了一片叶子一年中的食物量。它展示了树叶是如何收集阳光、水和空气。4.作者为什么写这本书？A.娱乐B.通知C.说服5.听下面这句话：树叶在秋天会变色。单词change的意思是变成__________.A.不同B.绿色C.更聪明6.扩展回答：让学生写出（或口述）书中的两个细节，即事实和如何证明事实的解释。然后，让学生写（或口述）一个关于树木或树叶的观点，并解释他或她是如何知道这是一个观点的。 |
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