WHY DO LEAVES CHANGE COLOR IN THE FALL?（儿童读物）

伊连

为什么叶子在秋天改变颜色？

Plants make their own food. They take water from the ground through their roots. They take a gas called carbon dioxide（二氧化碳） from the air. They turn water and carbon dioxide into food and oxygen. Oxygen is a gas in the air that we need to breathe.

Plants make their food using sunlight and something called chlorophyll（叶绿素）. Chlorophyll gives leaves their green color.



Winter days are short and dry. Many plants stop making food in the fall. The chlorophyll goes away. Then we can see orange and yellow colors. These colors were in the leaves all summer, but the green covered them up.

Some leaves turn red. This color is made in the fall, from food trapped in the leaves. Brown colors are also made in the fall. They come from wastes left in the leaves.

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yin wei shu shang xin le.

大鸦

汉语拼音

topspeed

These colors were in the leaves all summer, but the green covered them up.

haha