Composition and temperature of the Earth’s core constrained by combining ab initio calculations and seismic data. The inner core is the very center of the Earth, and the hottest part of the planet.It is a mainly a solid ball with a radius of about 1,220 km (760 mi), according to seismological studies. We know that the iron-nickel inner core is extremely hot, is constantly growing, and may have another core inside of it! In this lesson we will learn facts about the inner core, as well as how scientists study it. We can't travel there, so most of what we know about the core is based on scientists' theories. What is a Good PSAT Score for a Sophomore? Both cores of Earth are largely metallic and mainly Iron. The primary difference is that the inner core is solid due to immense pressure, while the outer core remains molten and is churned and stirred by the independently rotating inner core. The inner core is the very center of the Earth, and the hottest part of the planet. The inner core was discovered by Inge Lehmann in 1929, using seismology. In common parlance, the core of the body is broadly considered to be the torso. The lithostatic pressure that increases with depth also increases the melting point of the alloy. . We're doing our best to make sure our content is useful, accurate and safe.If by any chance you spot an inappropriate image within your search results please use this form to let us know, and we'll take care of it shortly. Get access risk-free for 30 days, It is a mainly a solid ball with a radius of about 1,220 km (760 mi), according to seismological studies. [4] Iron can only be solid at such high temperatures because its melting temperature increases dramatically at such pressures. What does INNER CORE mean? - Quiz & Self-Assessment Test, Certified Travel Consultant Courses and Certification Information. It is a solid located 3,160–3,954 miles (5,100 to 6,400 km) deep in earth's surface. The inner core is located at the very center of the Earth. It is a mainly a solid ball with a radius of about 1,220 km (760 mi), according to seismological studies. It's pretty amazing, actually. just create an account. The crust is the outermost layer, followed by the mantle, then the outer core. Compare that to a candle flame, which is only about 2,600 degrees Fahrenheit. Log in here for access. © copyright 2003-2020 Study.com. Will 5G Impact Our Cell Phone Plans (or Our Health?! Think about this: the deepest hole we've ever dug is the Kola Superdeep Borehole, which is only about 7 miles deep. You can test out of the {{courseNav.course.mDynamicIntFields.lessonCount}} lessons What Is the State of Matter of the Earth's Inner Core. The nickel alloy that makes up the earth's inner core is referred to as NiFe. Scientists estimate that the inner core, composed of mostly iron and nickel, can reach temperatures up as high as a whopping 10,000 degrees Fahrenheit. We truly appreciate your support. Only when one is connected to one's inner core is one connected to others. It grows because parts of the outer core crystallize, or turn solid, over time. - Lesson for Kids: Definition & Facts, What is Energy Conservation? The outer core exhibits a molten, or liquid, physical behavior. We protect it with distraction, avoidance and surface communication. It's not likely this will ever happen, though, since our sun will burn out in just 5 billion years! STANDS4 LLC, 2020. Since most meteorites come from asteroids, and asteroids were created at about the same time that Earth was created, meteorites can provide important clues about what formed our planet's inner core. Scientists believe that the earth's inner core is growing slowly. Earth's innermost section is called its inner core, and is believed to be just as hot as the sun's surface. And, for me, the core, the inner spring, can best be re-found through solitude. 's' : ''}}. The lithostatic pressure that increases with depth also increases the melting point of the alloy. Select a subject to preview related courses: You might be wondering how scientists know these incredible facts about the inner core, especially since we can't travel there to study it directly. The surrounding temperature is inadequate to liquefy the metal, hence, the inner core maintains its solidity. Travel Industry Degrees: Program Overviews, 5 Affordable Ways for Students to Travel the World, Should I Become a Travel Agent? The state of matter of Earth's inner core is solid. The inner core, discovered by Inge Lehmann in 1930, is a rigid metallic ball that is primarily composed of an iron-nickel alloy. Some believe that the earth's inner core formed between 2 and 4 billion years ago. Some scientists think that the inner core is actually a plasma - which, like liquid or gas, is a state that matter can be in - acting like a solid. Is the Coronavirus Crisis Increasing America's Drug Overdoses? - Definition, Facts & Uses, What is Dioxin? "INNER CORE." The inner core is the deepest and hottest layer of our planet. {{courseNav.course.topics.length}} chapters | Earth's magnetic field is not created by its solid iron and nickel inner core. It is estimated to be approximately 1,802 miles below the earth's surface (crust). - Lesson for Kids, Biological and Biomedical The inner core, discovered by Inge Lehmann in 1930, is a rigid metallic ball that is primarily composed of an iron-nickel alloy. A recent study conducted by researchers in the University of Rochester indicated that the Earth's inner core is younger than what scientists thought, offering a new insight into the history of the Earth's magnetic field and planetary habitability. Fact Check: What Power Does the President Really Have Over State Governors? It's about 4,000 miles below the surface. Definitions.net. Information and translations of INNER CORE in the most comprehensive dictionary definitions resource on the web. The vibrations Lehmann studied seemed to be moving across something solid in the center of the planet. Although the inner core is very hot, it is not liquid like the outer core. This is different from the rest of the inner core, which has iron crystals on a north-south axis. The earth is made up of several different layers. Services. Geoscientists mostly use seismic data to figure out how the inner core is structured. The magnetic field is created when the outer core flows around the inner core. Get instant definitions for any word that hits you anywhere on the web! The earth, from the center moving outward, is made up of the inner core, the outer core, the lower mantle, the upper mantle, and the crust. 25 Nov. 2020. These additional methods involve lab experiments, meteorite analysis, computer modeling, and reading of data. Definition of INNER CORE in the Definitions.net dictionary. Ni represents nickel, and Fe represents iron. The inner core makes up approximately 1.7% of earth's total mass, while the outer core makes up approximately 30.8% of the earth's total mass. on the other hand, the outer core of the earth is formed by a liquid layer of iron and nickel. credit by exam that is accepted by over 1,500 colleges and universities.