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Tea is the popular drink in the world water. tea comes from the tea plant. People leaves from it to make tea. The habit of tea has a long history in China. an old story , Chinese Emperor Shennong tea. Lu Yu, a writer the Tang Dynasty, wrote the book about tea. There are several types of Chinese tea, such as white tea, tea and black tea.
There are many kinds of trees. All trees have roots. The roots hold trees in the ground. The roots soak up ( 吸收 ) water and food. Then trees get water and food from the roots. You can't see inside a tree. But you can study how water moves through trees.
First, get a stalk ( 茎 ) of celery ( 芹菜 ) and cut off its end. Put red colour in a cup of water. Then put the stalk of the celery into the red water. Then we can see the red water moving up in the celery easily.
After half an hour, take the celery out. Cut it in half. Your celery should be red. This is because the water moved up the stalk. Water moves through trees in the same way as it moved through the celery.
