题目The atmosphere protects the earth. What is the atmosphere made of? A. Gas and dust B. Water and fire C. Earth and moon D. Stars and gas 相关知识点: 试题来源: 解析 A。本题考查对大气层组成的了解,大气层由气体和尘埃组成。B 选项水和火不对;C 选项地球和月亮不对;D 选项星星和气体...
Earth has an atmosphere. The atmosphere protects us from harmful rays. What is the atmosphere made of? A. Water vapor B. Gases C. Soil D. Rocks 相关知识点: 试题来源: 解析 B。解析:地球有大气层,大气层保护我们免受有害射线的伤害。大气层是由气体组成的。选项 A 水蒸气只是大气层的一部分...
D. The speed of the E. arth's rotation. 相关知识点: 试题来源: 解析 B。解析:科学家通过发射气象气球主要收集大气压力、温度和湿度等数据。A选项气象气球不仅仅收集降雨量。C选项气象气球不是主要用于收集天空中云的数量。D选项地球自转速度与气象气球收集的数据无关,所以答案是B。
The atmosphere protects the Earth from harmful radiation. What kind of radiation does it mainly block? A. Ultraviolet radiation B. Infrared radiation C. Gamma radiation D. Microwave radiation 相关知识点: 试题来源: 解析 A。解析:大气层主要阻挡紫外线辐射。
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"No one has seen that much in the atmosphere from natural processes, ever," Brune said. As a result, the study estimates that somewhere between 2% and 16% of the oxidizing ( 氧化 ),or cleaning that happens naturally in the Earth's atmosphere, is done by lightning....
The troposphere, the bottommost layer of Earth’s atmosphere, is the densest of the five atmospheric layers and extends from ground level up to about 10 kilometers in altitude. This is the layer where humans live and breathe, as it contains the air we depend on for survival. The tropospher...
“greenhouse effect,” in which heat becomes trapped within the Earth’s atmosphere, causing global temperatures to rise. Such emissions are primarily the result of human activities, especially the burning of fossil fuels such as coal, oil and natural gas. As countries and corporations seek ...
When sunlight reaches Earth, our atmosphere scatters and filters different wavelengths. Shorter wavelengths such as blue light are scattered outward, while longer wavelengths like red are bent — or refracted — into Earth's umbra, according to theNatural History Museum. When the moon passes through...
According to the professor, 400 years ago what was believed to be true about Earth's atmosphere? A. It prevented high-speed motion of objects on Earth. B. It would only move if Earth moved. C. It was not affected by the motion of the Sun. ...