Question

A recent survey of 2000 parents in Britain showed that they are often afraid of science questions asked by their curious children only because they have no idea what the answer is. Here is a list of some simple questions that you can ask your parents to see if they know the answers.

Q: Why is the sky blue?

A: You probably know white sunlight is made up of seven colors. While it moves in a straight line when going through space, it starts to divide as it hits “raised area” in the atmosphere. The ones with longest wavelengths pass through easily. The blue , however , can be taken in by the gas molecules (分子) because it has a shorter wavelength , which in turn scatters (使分散) it in different directions. That’s why when you look up at the sky, it appears to be blue.

Q: Why does the moon sometimes appear during the daytime?

A: The simple answer to that is because just like any other object it is being lit (照亮) by the sun. As long as it is around 45 degrees or even 90 degrees off the sun, it will receive light and be able to be seen. The only time it is not able to be seen during its 28-day orbit (轨道) around the earth is when it is right between the earth and the sun. That’s because its back , which is not lit by the sun, is facing us.

Q: Where do birds/ honeybees go in winter?

A: While the bird part is quite easy, since a lot of them get together and travel, the honeybee part is likely to puzzle your parents. It turns out that these busy insects stop being that active when the temperature drops below 50°F. Instead ,they get together in the lower central area of the hive（蜂巢）and form a ball around their queen. This helps keep both warm enough to survive the cold winter months.

1.The sky looks blue mainly because the color blue in the sunlight_______.

A. has the longest wavelength among all the colors

B. cannot be taken in by the gas molecules

C. doesn’t hit “raised area” in the atmosphere

D. cannot pass through space successfully

2.How long can’t the moon be seen during the daytime in a month?

A. 2. B. 28. C.30. D. 31.

3.What do honeybees choose to do when the temperature drops below 50°F?

A. They choose to be active in the wild.

B. They choose to keep themselves warm.

C. They choose to travel to a warm place.

D. They choose to get together in the upper central area of the hive.

4.What is NOT explained in the passage?

A. Why is the sky blue?

B. Why is the moon able to be seen during the daytime?

C. Why do birds travel in winter?

D. Where do honeybees go in winter?

 

Answer 1

1.D

2.B

3.B

4.C

【解析】

试题分析：一个最近的对英国2000多名父母的调查显示，父母最怕孩子问他们科学问题。以下是几个简单的问题，看看你的父母知不知道。天空为什么是蓝色的？阳光是由七种颜色组成的，波长的颜色可以直接穿过大气层，而蓝色波长最短，被大气分子吸收，分散到不同的方向，所以看到天空是蓝色的。月亮为什么有时候会在白天出现？月亮发光能被看到是因为被阳光照射到。只要与阳光的角度在45度左右，甚至是90度，就能够接受到阳光。在月亮28天周期的运行轨道中，唯一看不到的时刻是月亮位于太阳和地球之间。

冬天鸟儿和蜜蜂去哪里了？鸟儿迁徙了，蜜蜂为了避寒聚集到蜂巢中心处，围住蜂王，

1.

2.

3.

4.

考点：科普环保类阅读。