The earth's surface is like its skin. Beneath this surface, or crust, there are several more layers of the planet. The hottest area, the earth's solid inner core is 10 percent sulphur. The rest is iron and nickel. The inner core is 800 miles thick. The outer core contains molten, v...
DMany of us have wondered what the Earth looks likebelow the surface. Writers and scientists have too.French novelist Jules Verne once wrote the masterpieceJourney to the Center of the Earth. In the novel,explorers go to the Earth's center and discover amazingwonders.But in real life, human...
Without water, Venus became less and less like Earth and kept an atmosphere filled with carbon dioxide. The carbon dioxide acts as a blanket, creating an intense greenhouse effect and driving surface temperatures high enough to melt lead and to [#highlight4]prohibit[/highlight4] the formation ...
all four and a half billion years, variations in the luminosity of the Sun have been compensated for by a variable greenhouse effect. It's like a sort of geophysical thermostat keeping the Earth always inhabitable, with oceans on the surface.地球有一件迷人的事情，这可能使它...
Besides tiny dots, the texture on a surface is often mottled or spotty, much like ink-blots or amoeba. To see the shape of the mottled surface, vision can fit shape functions to centers of blots and clumps. The distribution of the centers can be detected even if the eccentricities of the...
for life to occur on Mars, before the planet lost its atmosphere, and any record of these beginnings could have very well been preserved under the surface. Mars had a youth very similar to Earth's, with liquid water, comets raining down, organic matter and so on, just like on Earth.在...
In underground rail systems like those in London, Moscow, and New York City, hundreds of drainage pumps are abandoned, flooding the tunnels in just three days. By the end of the first week, most emergency generators have shut down, and once the fires have gone out, the earth goes dark ...
Now, these muons are still highly energized, so they can easily pass on down to the Earth’s surface. 现在,这些介子仍然有很高的能量,它们能够很轻易地一直传递到地球的表面。 In fact, they can pass through solid matter, so they can also penetrate deep into the surface. ...
near the ocean often like to swin in the waves, hunt for shells, and play in the sand.The ocean may look like a large pool of water.but it's much more than that.1. What is mainly talked about in the first paragraph? A. Four oceans cover three-fourths of the Earth's surface. B...
根据第三段的“The way we're doing that is to use a satellite altimeter, a radar to map the to- pography of the ocean surface”和第四段的“The equip- ment works by sending sound waves through the water. When the sound waves hit an object, its presence is con- firmed,”可知,我们...