Good questioning little goldfish

The little goldfish live in a crystal clear stream. One day, the little goldfish was swimming freely in the water. Suddenly, he saw a weeping willow swaying gently with the breeze, and the body reflected in the water, and the heat outside disappeared immediately. The little goldfish looked at the tall and straight weeping willow, thinking: "How is this willow tree green, its leaves are not dense, how can there be a good shade?" "I still ask the learned grandfather grandfather!" After that, I went to the turtle grandfather's house.

On the way, it saw the rabbit brother Xiaohua on the shore, holding a stick-like thing in his hand, and asked inexplicably: "Brother brother, what are you doing?" "I am blowing bubbles!" After that, I saw Xiaohua gently blowing, five or six big bubbles from the "wooden stick" one drilled out, in the sunshine, the five colors, very beautiful. Xiaohua cried happily. The little goldfish has another question: "Why does the bubble change in the sun?" "You ask the tortoise grandfather! It may give you a satisfactory answer." "Okay, goodbye!" "Goodbye!" The little goldfish continued to swim. The small goldfish looked up and saw the mountains and rivers standing on the edge of the river. The natural landscape also caused the little goldfish to question: "How is this mountain peak formed?" Simply, I will ask the turtle grandpa for these questions!" It's faster.

In a short while, I came to the tortoise grandfather's house. "Grandfather, please open the door, I am a small goldfish." The little goldfish called the door very politely. After a short while, the tortoise grandfather opened the door. Although it is over 10,000 years old, it still looks good. The little goldfish raised four questions in a row. The tortoise smiled and said: "The willow leaves are exposed to the sun and absorb ultraviolet rays to produce chlorophyll, so it is green; you feel so cool because the color of the willow leaves is darker and covered. The sun is shining, so there is a good shade; the bubble contains a variety of compounds, in the sunlight, so it is colorful, and the mountains are formed by the movement of the earth's crust." Listened to the turtle's answer, small The goldfish said happily: "Thank you!" and he left with satisfaction.

The little goldfish is really hard to learn!