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 magnetic field can indicate the movement of materials in the core. D. It can directly show the thickness of the mantle. 相关知识点: 试题...
ZoologyAnimal behaviourMolecular biologyIron-binding proteins could help rainbow trout to navigate.#Iron-binding proteins could help rainbow trout to navigate.#New Content Item#New Content Itemdoi:10.1038/d41586-017-00633-7NatureNature
Earth is no exception, right? Male student: Right. Professor: Okay, keep in mind that solar wind is electrically charged, which means that it interacts with the magnetic field as electromagnetic theory tells us. Okay, how does it interact? Earth, magnetic field deflects most the solar wind,...
Research reveals that a weakened magnetic field between 591 and 565 million years ago might have triggered higher oxygen levels, aiding the development of complex life. An unusual reduction in the strength of the Earth’s magnetic field between 591 and 565 million years ago coincided with a signi...
Life as we know it could not exist without Earth's magnetic field and its ability to deflect dangerous ionizing particles from the solar wind and more far-flung cosmic rays. It is continuously generated by the motion of liquidironin Earth'souter core, a phenomenon called the geodynamo. ...
Physicist: High energy charged particles rain in on the Earth from all directions, most of them produced by the Sun. If it weren’t for the Earth’s magnetic field we would be subject to bursts of radiation on the ground that would be, at the very least, unhealthy. The more serious, ...
Professor Peter Hore at the University of Oxford says it could be that birds can ‘see’ the Earth’smagnetic field, although they don’t know that for sure. 牛津大学的彼得·霍尔教授说,这也许是因为鸟类可以 “看到” 地球的磁场,不过科学家们还不能完全确定这一点。
Some animals can sense the earth's magnetic field (磁场),while humans can't.This magnetic field guides a certain kind of fish when they swim a long way to a place and then back.How can this kind of fish do that?It is still a mystery.Scientists have no good an...
A compass is small magnet that aligns itself with the north and south poles of the Earth’s magnetic field. As the needle is stroked across the magnet, it becomes magnetized because the electrons within the needle straighten up and align themselves with the magnet. ...
Planet Earth is an exceptionally accurate timekeeper What is time? Working Principle of Atomic Clocks In an atomic clock, the natural oscillations of atoms act like the pendulum in a grandfather clock. However, atomic clocks are far more precise than conventional clocks because atomic oscillations ha...