The Earth was formed about 4.5 billion years ago.Its interior is divided into three layers.Each layer has different characteristics and is made of different elements and minerals.There are many different types of features on Earth's surface due to the complexity of our planet.The Earth is ...
when seen from space.The third planet from the Sun.,it is the largest of the inner planets.Earth is the only plant known to support life and have liquid water at the surface.The Earth was formed about 4.5 billion years ago.Its interior is divided into three layer.Each layer has ...
causing some chemicals to rise to the surface and form water, while others became the gases of the atmosphere. Recent evidence suggests thatEarth's crustand oceans may have formed within about 200 million years after the planet took shape. ...
Scientists have been able to reconstruct detailed information about the planet's past. The earliest dated Solar System material was formed 4.5672 ± 0.0006 billion years ago, and by 4.54 billion years ago (within an uncertainty of 1%) the Earth and the other planets in the Solar System had fo...
Earth: Earth is the third planet from the Sun, home to millions of species, including humans, and the only known planet to support life. island: An island is a piece of land surrounded by water. seamount: A seamount is an underwater mountai...
根据“Live Science has published a list of the eight biggest mysteries about Earth. Let's look at some of them.”及全文内容可知,本文主要讲述无法解释的地球之谜中的几个。故选D。【小题2】细节理解题。根据“Scientists think that it might have arrived in the form of ice by an asteroid(小...
Earth Facts Earth is the third planet from theSunand is the largest of theterrestrial planets. The Earth is the only planet in our solar system not to be named after a Greek or Roman deity. The Earth was formed approximately 4.54 billion years ago and is the only known planet to support...
Called the Mid-Ocean Ridge, this underwater range was formed by magma rising to fill gaps that formed as Earth's plates shifted. Its mountains average a depth of 8,200 feet below the water's surface. In comparison, the longest chain of mountains on land is South America's An...
根据第一段的倒数第二句LiveScien ce has published a list of the eight biggest m ysteries about Earth.《生命科学》 发表了一份 关于地球的八大谜团的名单。 可知答案为:C。 细节理解题。 根据第二段的第三句 Scientists thi nk that it might have arrived in the form of i ce by an asteroid (...
Learning a few amazing facts about Earth can remind humanity how lucky we are to call this planet home. One of the biggest of these mind blowing things about Earth is the fact that it's more than 4.5 billion years old. Then about 3.8 billion years ago, single cell organisms ...