Following the first detection of a certain type of seismic wave, scientists have gained new insight into the structure of the Earth's inner core. While the findings confirm the core is solid, the speed of the wave suggests that it could be "softer" than originally thought. Earthquakes,...
百度试题 结果1 题目What is the outer core of the Earth? A. Solid B. Liquid C. Gas D. Rock 相关知识点: 试题来源: 解析 B。地球的外核是液态的。反馈 收藏
Discusses the components of the earth's core. Discrepancy between the seismically determined density within the Earth's core and the experimentally determined density of iron; Solubility of ferrous oxide in molten iron at high pressures; Convection responsible for the Earth's magnetic field.Bassett...
Inside the shel of the egg,there is a white part and a yellow part. The white part covers the yellow part Ifthe mantle is ike the white part, the core of the Earth is like the yellow part. Howabout other planets? They also have cores.I. Read and choose.阅读短文,选择正确的答案。(...
At the centre of our planet is a solid mass of nickel and iron, crushed down by gravity into a sphere roughly 2,400 kilometres wide. This solid core is surrounded by an outer layer of liquid iron and nickel, which generates...
"Earth science is a really broad field," he explains. "It's not just about rocks or fossils. It's about understanding the world around us and how it works and so there are many different ways of doing that." Cassidy, who oversees various scientific journals that relate to her field of...
Earth’s Inner CoreScientists have long struggled to understand what lies at the planet’s center, Directobservation of its center is impossible,so researchers must___(51)to other evidence. In 1889,a German scientist detected a severe earthquake in Japan.Geophysicists concluded that shock waves__...
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?
Businesses must take the lead in mitigating climate change's effects. Learn why environmental, social, and governance (ESG) investing is a key step.
Although we crust-dwellers walk on nice cool ground, underneath our feet the Earth is a pretty hot place. Enough heat emanates from the planet's interior to make 200 cups of piping hot coffee per hour for each of Earth's 6.2 billion inhabitants, says Chr