The earth has a magnetic field. What does the magnetic field do? A. Makes the earth spin B. Attracts iron and steel C. Makes the sun shine D. Helps plants grow 相关知识点: 试题来源: 解析 B。本题考查对地球磁场作用的了解,地球磁场能吸引铁和钢。A 选项地球自转不是磁场的作用;C 选项...
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 ...
The way Carlo Laj tells it, the 1980s were a dead time for scientists studying Earth's peculiar habit of flipping its magnetic field every few hundred thousand years. Laj and other paleomagnetists spent the decade roving the world, accumulating records of times when the magnetic field reversed...
Researchers have shed light on how heat is conducted by the inner and outer cores of the Earth to create its protective magnetic field. AsianScientist (Jun. 16, 2016)– Earth’s magnetic field shields us from deadly cosmic radiation. Without it, life as we know it could not exist. But h...
A. A protective magnetic field is formed at the same time. B. It is trapped in magnetic belts around the Earth. C. It destroys the protective magnetic field surrounding the Earth. D. It breaks magnetic field lines and does severe damage to the E. t. The same magnetic field that makes...
Far below the surface of the Earth lies the extremely hot liquid outer core of the planet. This liquid core rotates around the solid inner core and produces the magnetic field of the Earth.Answer and Explanation: The Earth's magnetic field creates the magnetosphere that protects the Earth from...
1) Is there any evidence that the Earth's magnetic field originates in the core rather than elsewhere? 2) Is there a compelling physical model?
wmode=transparent&start=0 Earth’s magnetic field is generated by what’s called a “dynamo effect.” Earth isn’t the only planet with a magnetic field – gas giant planets like Jupiter have aconducting metallic hydrogen layerthat generates their magnetic fields....
The Earth's magnetic field is constantly changing, and the way which it changes also changes. When describing the magnetic field of the Earth we must specify both the direction and the intensity of the field. Since both of these change, and change differently ...
This creates a toroidal, or doughnut-shaped field, as the direction of the field propagates outward from the north pole and enters through the south pole. Earth itself is a giant magnet. The planet gets its magnetic field from circulating electric current within the molten metallic core, ...