生活中有很多有趣的自然现象,只要你用心观察就会发现。下面和我一起探索这些现象背后的奥秘吧!树叶为什么不往上飘?秋天一到,很多树的叶子都变黄了。秋风一吹,一片片树叶便挣脱树枝的束缚,飘哇,飘哇,慢慢悠悠地来到了地面。树叶很轻,它们为什么不能一直飘着呢?是谁让树叶向下飘落,而不是向上飘去呢?原来是地球的重力。重力就像一双神秘的大手,把所有的东西都往下拉。 There are many interesting natural phenomena in life, as long as you carefully observe will find. Let’s explore the mystery behind these phenomena! Why do not leaves float? Many trees have turned yellow in autumn. Autumn wind blowing, a piece of leaves will get rid of the shackles of branches, floating wow, floating wow, slowly came to the ground leisurely. The leaves are very light, why can not they always float? Who let the leaves fall down, rather than floating up? Originally the earth’s gravity. Gravity is like a mysterious hand, pulling everything down.