① Is the sky bluer in autumn than in summer? The answer is yes! There are real reasons for this.
② The sun is lower in the sky in autumn. As the days get shorter, the sun appears lower and lower in the sky. It doesn't shine directly on our horizon. Instead, it is closer to the earth and more blue light is scattered(散射). This makes the sky seem bluer.
③ In autumn, there is less water in the air, so there are fewer clouds. Autumn is known for good weather—cooler temperatures and less wet air. The air does not hold much water, so clouds do not form easily. When there are few or no clouds covering the sky, the blue colour of the sky shows more clearly, and the sky looks more open and brighter.
④ You might be surprised, but the colourful leaves of autumn actually help give the sky's blueness a colour boost(增强), which can make the sky seem even bluer. If you've made a colour wheel for an art class, you know that blue and orange are opposite colours that look good together. The red, orange, and gold leaves of autumn make the blue sky stand out beautifully against them. This contrast looks nice and creates a special autumn view.
⑤ So, the next time you're out enjoying the beautiful weather in autumn, take a moment to look up at the sky. Remember these reasons why it looks so blue and enjoy the view!
任务一 回答问题(每题答案不超过8个词)
1. Why is the sky bluer in autumn? Give one reason.
Because the sun is lower. /Because there are fewer clouds. /Because of the colourful leaves.
2. How do colourful leaves help the sky?
They make the sky stand out.
3. What is autumn famous for?
Good cool dry weather.
4. What is the passage mainly about?
Why the autumn sky is bluer.
5. Do you know other scientific phenomena that happen during the changes of seasons? Give one example.
Yes. Frost forming in autumn.(言之有理即可)
任务二 阅读理解
1. (创新考法·图片理解)Which one shows the relationship between the water in the air (x) and the blue colour of the sky (y)?
2. (创新考法·篇章结构)What is the structure of the passage?
