《2024年红对勾45分钟作业与单元评估九年级英语全一册冀教版》

Ⅱ. (2024山路北区期中)阅读理解【主题：人与社会 天空颜色实验】
Colours from milk
In this experiment, a glass of water acts like the Earth's atmosphere—the air that surrounds(围绕) us and the sky over our heads.
You'll need
- Clear drinking glass
- Milk, any kind
- Small spoon
- Flashlight(手电筒)

1. Fill a glass halfway with water. In a darkened room, shine a flashlight on the glass from top, sides and all angles(角度).

Does the light change when it goes through the glass?
2. Add 1/4 teaspoon of milk to water and stir (搅拌). Shine the flashlight on the glass from all angles again.

What do you see?
What happens?
The light looks blue when you look at the side of the glass.
That's because the tiny particles (分子) of milk scatter (使分散) the light, making it look blue.
Tiny bits of dust and air pollution in the atmosphere scatter sunlight and make the sky look blue.
Look at the side of the glass opposite the light, and it looks pink or orange.
Blue light has scattered from the beam(光线) of light, leaving those colours.
When sunlight shines through the atmosphere at sunset and sunrise, it looks reddish(微红的).
SOURCE: TNS
1. Which of the following is not needed in this experiment?
A. Cup.
B. Flashlight.
C. Spoon.
D. Milk.
(A)
2. What is the right order of the experiment?
①Add some milk to water and stir.
②Fill a glass halfway with water.
③Shine the flashlight on the glass from all angles again.
④Shine a flashlight on the glass from all angles.
A. ②③①④
B. ①③②④
C. ②④①③
D. ①④②③
(C)
3. Which statement of the experiment is NOT true?
A. The experiment must be done in a darkened place.
B. Any kind of milk can be used in this experiment.
C. The light looks blue when you look at the side of the glass opposite the light.
D. The milk in the experiment is like the dust and air pollution in the atmosphere.
(C)

答案： 1. A 2. C 3. C