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。地壳的旋转与磁场产生关系不大,B选项错误。地球表面的水对磁场产生没有直接...
(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. ...
This property of the earth's field is called "inclination." Although the geomagnetic field may be molded as if the earth were a permanent magnet, it is clear that this is not the case because thermal disordering temperatures of permanently magnetized materials are exceeded by burial greater ...
S Macmillan,MJ Rycroft 摘要: Scientists have been measuring the Earth's magnetic field for several centuries. They have built up an increasingly more detailed worldwide picture of the field and its variation with time. Field measurements are now made from ships, aeroplanes and satellites as well...
Some volcanic rocks are magnetized in a direction opposite to that of the present magnetic field of the earth. The reason is that the earth's field has reversed nine times in the past 3.6 million years
The magnetic field amplifies the iron of mantle and a kernel of the Earth. As a result of action of a radial electric field the electrons will flow from the center of a kernel in a layer of an electric charge. The central part of a kernel represents the field with a positive electric ...
磁层磁场模型地球电磁环境A half of a century has passed since the Earth's magnetosphere was discovered by satellite Explores in 1958.Studies on space physics cover a wide range of topics: electromagnetic fields,electric currents,particles,plasma waves et cetera.Various models have appeared for ...
According to the passage, the Earth’s magnetic field has ___. A. begun to change in the opposite directionB. been weakening in strength for a long timeC. caused the changes on the polaritiesD. misguided many a man and animal 相关知识点: 试题来源...
magnetic activitymagnetic stormsspace weathercompassnavigationThe origin of the Earth''s magnetic field is one of the oldest problems in physics. The fact that the field is now known to have reversed its polarity many times in the past has given added interest to the problem. This paper ...
Magnetic field measurements in the Earth's magnetosheath are compared with four analytical models, namely Kobel and Flückiger (1994), (https://doi.org/10.1029/94ja01778), Romashets and Vandas (2019), (https://doi.org/10.1029/2018ja026006), Vandas and Romashets (2019), (https://doi...