12. 答案:A 第二段中,"This" 指代的是前文提到的 "a big collision (碰撞) took place in the sky, about the size of Mars, hit the Earth",即 Theia 撞击地球。 13. 答案:B 文章提到,科学家通过研究月球岩石中的一种特殊矿物质,更清晰地了解了 Theia 的性质,从而推断出月球的年龄。反馈...
Theia, which did not survive the collision except that it now makes up large parts of Earth and the moon was growing and probably would have become a planet if the crash had not occurred, Young said. Young and some other scientists believe the planet was approximately the same size as the...
The possibility that Theia had such a big impact on the formation of the Earth inspires new research into the Earth’s early history. “A logical consequence of the idea that the LLVPs are remnants of Theia is that they are very ancient,” said Paul Asimow, a Caltech researcher and autho...
“ofboththemoonandTheia.TheyalsocontainelementsofarareformofmeteoritenotfoundonEarth,suggestingthey musthavecomefromanothercelestialbody(天体).”其中“moonandTheia,they”都是指代同一物体,所以they指的是moonandTheia。所以选择A项。 67.C 解析:推理判断题。A项由“Thoughitmaybemovingfartherfromusindistance”...
Most scientists agree that a major collision 4.5 billion years ago with a protoplanet named Theia formed the Earth-Moon system. Now, a new study from the University of Nevada argues that, out of the chaos of that collision, polar circumbinary “moons” might’ve existed in the early days...
Most planetary scientists believe that the Moon formed from an impact between the Earth and a planet-sized body, which has been given the name Theia. Efforts to confirm that the impact had taken place had centered on measuring the ratios between the isotopes of oxygen, titanium, silicon, and...
Theleading theory— known as theGiant Impact Hypothesis— is that the moon was created 4.5 billion years ago when a would-be planet the size of Mars smashed into the still-forming Earth. This epic collision between early Earth and the proto-planet calledTheiashot an enormous amount of debris...
Billions of years ago, so the theory goes, a Mars-sized body (sometimes called “Theia”) smashed into our young planet and caused a near-catastrophe. Earth fortunately survived the risk of blowing apart, and the fragments from the crash gradually coalesced into the Moon that w...
Collision theory（碰撞理论）指的是化学反应发生的前提是反应物分子之间发生碰撞，且这些碰撞必须满足一定...
Looking up at the sky on a clear night,the moon may seem like it is a universe away.At a distance of more than 238,000 miles from our little blue planet,it practically is.But there was once a time the Earth and the moon were not so far apart. ...