The Earth's magnetic field is generated mainly by _. A. the movement of the outer core B. the rotation of the crust C. the presence of water on the surface D. the heat from the sun 相关知识点: 试题来源: 解析 A。解析:地球的磁场主要是由外地核中液态金属的流动产生的。地壳的旋转与...
The Earth's magnetic field ___ constantly changing. A. is B. was C. will be D. would be 相关知识点: 试题来源: 解析 A。本题考查现在进行时态。“地球的磁场在不断变化”表示现阶段正在进行的动作,所以用现在进行时态 is constantly changing。反馈 收藏 ...
The Earth's magnetic field _. A. is evenly distributed all over the Earth B. is stronger at the poles than at the equator C. has no influence on the atmosphere D. only E. xists above the surface 相关知识点: 试题来源: 解析 B。解析:地球磁场在两极比在赤道更强。地球磁场并不是均匀...
The Earth's magnetic field is generated mainly in which part of the Earth's interior? A. The upper part of the crust B. The lower part of the mantle C. The outer core D. The inner core 相关知识点: 试题来源: 解析 C。解析:地球的磁场主要是由外核中液态铁镍的流动产生的,而不是地壳...
(redirected fromEarth's magnetic field) Encyclopedia Wikipedia ge·o·mag·ne·tism (jē′ō-măg′nĭ-tĭz′əm) n. 1.The magnetism of the earth. 2.The study of the earth's magnetism. ge′o·mag·net′ic(-nĕt′ĭk)adj. ...
A. the flows of melted iron inside the Earth B. the periodical movement of the Earth C. the mechanical energy of the solar system D. the force corning from outer space 相关知识点: 试题来源: 解析 A 正确答案:A 解析:文章最后一段:谁也不能准确地知道为什么地球磁场会周期性转换,但是科学家说...
相关知识点: 试题来源: 解析 C。解析:The main function of the earth's magnetic field is to protect the earth from solar winds. The magnetic field does not make the earth look beautiful, attract things to the earth or make the earth spin.反馈 收藏 ...
In the study of the Earth's interior, magnetic field data is also used. How does the Earth's magnetic field help in understanding the Earth's interior? A. It has no relation to the Earth's interior structure. B. It can only tell us about the surface temperature. C. Changes in the ...
radiation is high,the magnetic fieldassociated with it deflects some of the galactic radiation away fromtheearth. dragonair.com dragonair.com 當太陽的輻射達致高點時,與之相連的磁場會將部分銀河輻射移離地球。 dragonair.com dragonair.com [...] ...
magnetic activitymagnetic stormsspace weathercompassnavigationThe Earth's magnetic field is generated in the fluid region deep inside the Earth. Heat convection, buoyancy forces and planetary rotation cause the iron-rich fluid in the outer core to flow in a complex way and the movement of this ...