The earth - The meaning of EARTH is the fragmental material composing part of the surface of the globe; especially : cultivable soil. How to use earth in a sentence.

 
May 23, 2023 · New NASA Map Details 2023 and 2024 Solar Eclipses in the US. While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal. . Gta clone github

The Bible says that “God created the heavens and the earth.”. ( Genesis 1:1) He told the first human pair: “Be fruitful and become many, fill the earth and subdue it, and have in subjection . . . every living creature that is moving on the earth.”. ( Genesis 1:28) The only mention of death was in connection with disobedience. Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. Earth is special because it is an ocean planet. Water covers 70% of Earth's surface. Earth's atmosphere is made mostly of nitrogen and has plenty of oxygen for us to breathe.Earth’s axial tilt (or obliquity) and its relation to the rotation axis and plane of orbit. Credit: Wikipedia Commons. The Earth has an orbital period of 365.25 d ays, which is the equivalent of ...1. Earth’s non-mythological etymology is unique among planets. Earth is the only planet in our solar system that doesn’t get its name from Greek or Roman mythology.Download Google Earth in Apple App Store Download Google Earth in Google Play Store Launch Earth. keyboard_arrow_down. Create stories and maps. With creation tools, you can draw on the map, add ...Movie trailer. The Day the Earth Stood Still (working titles: Farewell to the Master and Journey to the World) is a 1951 American science fiction film from 20th Century Fox, produced by Julian Blaustein and directed by Robert Wise. It stars Michael Rennie, Patricia Neal, Hugh Marlowe, Sam Jaffe, Billy Gray, Frances Bavier and Lock Martin.Earth is estimated to have formed around 4.5 billion years ago – almost one-third of the age of the universe – through accretion from the solar nebula. Earth is the third planet from the Sun, at a distance of 1 AU or 147 million km / 91 million mi. It is the fifth-largest planet in the Solar System, being the largest of the terrestrial planets.2 days ago · Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. It is designated by the symbol ♁. Earth is the only special planet of the Solar system that contains life due to the presence of liquid water in abundance and free atmospheric oxygen. Earth has an oblate spheroidal shape. The mass of Earth is approximately 5.97x10²⁴. Earth revolves around the sun and completes its one round in 365.26 days.The days are getting longer. The length of Earth's day is increasing. When Earth was formed 4.6 billion years ago, its day would have been roughly six hours long. By 620 million years ago, this had increased to 21.9 hours. Today, the average day is 24 hours long, but is increasing by about 1.7 milliseconds every century.USA TODAY. A newly discovered comet will briefly illuminate the night sky before the end of the month. This is the first time in more than 400 years that Comet Nishimura will pass by the Earth ...The Earth's crust is an extremely thin layer of rock that makes up the outermost solid shell of our planet. In relative terms, it's thickness is like that of the skin of an apple. It amounts to less than half of 1 percent of the planet's total mass but plays a vital role in most of Earth's natural cycles.One is the heat that Earth inherited during its formation 4.5 billion years ago. The Earth was made from the solar nebula , a gigantic gaseous cloud, amid endless collisions and mergings between ...0.0408% carbon dioxide [28] ~ 1% water vapor ( climate variable) Earth is the third planet from the Sun in the Solar System. It is the only planet known to have life on it. The Earth formed about 4.5 billion years ago. [29] [30] It is one of four rocky planets on the inner side of the Solar System.Download Google Earth in Apple App Store Download Google Earth in Google Play Store Launch Earth. keyboard_arrow_down. Create stories and maps. With creation tools, you can draw on the map, add ...They estimate that Earth formed more than 4.4 billion years ago. Although no one knows when the outer crust of the planet began to form, some scientists believe that the existence of a few grains of zircon dated to about 4.4 billion years ago confirm the presence of stable continents, liquid water, and surface temperatures that were probably ...One is the heat that Earth inherited during its formation 4.5 billion years ago. The Earth was made from the solar nebula , a gigantic gaseous cloud, amid endless collisions and mergings between ...Measuring the Circumference of the Earth. More than 2,000 years ago Eratosthenes compared the position of the Sun’s rays in two locations to calculate the spherical size of the Earth with reasonable accuracy. Eratosthenes was born in the Greek colony Cyrene, now the city of Shahhat, Libya. As a young man, he traveled to Athens to pursue his ...Sep 7, 2023 · USA TODAY. A newly discovered comet will briefly illuminate the night sky before the end of the month. This is the first time in more than 400 years that Comet Nishimura will pass by the Earth ... Download Google Earth in Apple App Store Download Google Earth in Google Play Store Launch Earth. keyboard_arrow_down. Create stories and maps. With creation tools, you can draw on the map, add ... Earth exists thanks to our sun, having formed in orbit around it from a huge cloud of gas and dust in space, 4.5 billion years ago. Likewise, the sun will ruin Earth for living things, some 5 ...Dec 15, 2022 · The resulting chunks clumped together and formed our Moon. With a radius of 1,080 miles (1,738 kilometers), the Moon is the fifth largest moon in our solar system (after Ganymede, Titan, Callisto, and Io). The Moon is an average of 238,855 miles (384,400 kilometers) away from Earth. That means 30 Earth-sized planets could fit in between Earth ... In the Earth (stylized as IN THE EⱯRTH) is a 2021 science fiction psychological horror film written and directed by Ben Wheatley. The film stars Joel Fry, Reece Shearsmith, Hayley Squires, Ellora Torchia, John Hollingworth and Mark Monero . In the Earth had its world premiere at the 2021 Sundance Film Festival on 29 January 2021, was released ...Examples of When to Capitalize Earth in a Sentence. The Blue Whale is the largest animal on Earth. It takes sunlight 8 ⅓ minutes to reach us here on Earth. Falling stars are meteorites burning up in Earth’s atmosphere. The history of Earth’s existence can be found in geological studies. Earth is the third planet from the Sun. The earth is split into four major layers: the crust, the mantle, the outer core and the inner core. The crust is what humans live on, and it consists of only one percent of the Earth's mass. The centre of the Earth is a solid ball of nickel and iron roughly 70% the size of the moon. Geologists have come a long way in terms of the collective ...10 Things: Dust in the Wind (on Mars and Well Beyond) Frozen: Ice on Earth and Well Beyond. US-European Satellite Will Make World's First Global Freshwater Survey. nasa.gov. NASA, SpaceX Launch Climate Science Research, More to Space Station. nasa.gov. NASA's ECOSTRESS Sees Las Vegas Streets Turn Up the Heat. nasa.gov. From the Earth Missouri dispensaries offer curbside pickup and delivery services in select areas, including Downtown, Westside, Brookside, Independence, and Raytown. Other things to note: To guarantee a smooth ride, please ensure exact change on hand, as drivers can only provide up to $5 in change.Dec 15, 2022 · The resulting chunks clumped together and formed our Moon. With a radius of 1,080 miles (1,738 kilometers), the Moon is the fifth largest moon in our solar system (after Ganymede, Titan, Callisto, and Io). The Moon is an average of 238,855 miles (384,400 kilometers) away from Earth. That means 30 Earth-sized planets could fit in between Earth ... Claim: Earth isn't curved and doesn't rotate. Our rating: False. The Earth is curved and does rotate, and there are several ways scientists have proved this, experts say. The curvature of the ...NASA.gov brings you the latest images, videos and news from America's space agency. Get the latest updates on NASA missions, watch NASA TV live, and learn about our quest to reveal the unknown and benefit all humankind.Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) [1] including 1 billion people in more than 193 countries. [2] [1] [3] The official theme for 2023 is Invest In Our ... The days are getting longer. The length of Earth's day is increasing. When Earth was formed 4.6 billion years ago, its day would have been roughly six hours long. By 620 million years ago, this had increased to 21.9 hours. Today, the average day is 24 hours long, but is increasing by about 1.7 milliseconds every century.Apr 8, 2022 · This process created our solar system's asteroids, comets, planets and moons. Earth's rocky core formed first, with heavy elements colliding and binding together. Dense material sank to the ... Dec 15, 2020 · The earth is split into four major layers: the crust, the mantle, the outer core and the inner core. The crust is what humans live on, and it consists of only one percent of the Earth's mass. The centre of the Earth is a solid ball of nickel and iron roughly 70% the size of the moon. Geologists have come a long way in terms of the collective ... Apr 16, 2015 · The damned ones. Revelation 6:15. And the kings of the earth, the great men, the rich men, the commanders, the mighty men, every slave and every free man, hid themselves in the caves and in the rocks of the mountains, 16 and said to the mountains and rocks, “Fall on us and hide us from the face of Him who sits on the throne and from the wrath of the Lamb! 17 For the great day of His wrath ... Therefore, the age of the Earth is approximately one-third of the age of the universe. Early Calculations . It is believed that the accretion of Earth began after the formation of the calcium-aluminum-rich inclusions and the meteorites. It is also estimated that these calcium-aluminum-rich inclusions are approximately 4.567 billion years old.In the Earth is currently available to stream on Hulu and Kanopy. If you don’t have access to either of those streamers, the film is available to rent from $1.99 and purchase from $9.99 on ...In 1862, the physicist William Thomson, 1st Baron Kelvin published calculations that fixed the age of Earth at between 20 million and 400 million years. He assumed that Earth had formed as a completely molten object, and determined the amount of time it would take for the near-surface temperature gradient to decrease to its present value.Earth exists thanks to our sun, having formed in orbit around it from a huge cloud of gas and dust in space, 4.5 billion years ago. Likewise, the sun will ruin Earth for living things, some 5 ...The Short Answer: Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.All About Earth. Since we live here, you might think we know all there is to know about Earth. Not at all, actually! We have a lot we can learn about our home planet. Learn more about Earth and all the planets in our solar system. Play. Go With the Flow!Earth is estimated to have formed around 4.5 billion years ago – almost one-third of the age of the universe – through accretion from the solar nebula. Earth is the third planet from the Sun, at a distance of 1 AU or 147 million km / 91 million mi. It is the fifth-largest planet in the Solar System, being the largest of the terrestrial planets.Download Google Earth in Apple App Store Download Google Earth in Google Play Store Launch Earth. keyboard_arrow_down. Create stories and maps. With creation tools, you can draw on the map, add ...The days are getting longer. The length of Earth's day is increasing. When Earth was formed 4.6 billion years ago, its day would have been roughly six hours long. By 620 million years ago, this had increased to 21.9 hours. Today, the average day is 24 hours long, but is increasing by about 1.7 milliseconds every century.the earth is a living thing. Lucille Clifton. 1936 –. 2010. is a black shambling bear ruffling its wild back and tossing mountains into the sea is a black hawk circling the burying ground circling the bones picked clean and discarded is a fish black blind in the belly of water is a diamond blind in the black belly of coal is a black and ...Earth is the densest major body in the solar system. Density of planet Earth is about 5.52 g/cm 3 or 5 520 kg/m 3. Water, as you might know, has a density of 1000 kg/m 3 at 3.98 degrees centigrade and at one atmosphere of pressure. Orbital Data: Sidereal period (Time Earth needs to orbit the sun once) 365.256 days. Rotation: Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. It is designated by the symbol ♁.Earth orbit (yellow) compared to a circle (gray) Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi) [1] in a counterclockwise direction as viewed from above the Northern Hemisphere. One complete orbit takes 365.256 days (1 sidereal year ), during which time Earth has traveled 940 million km (584 million mi). [2]Earth is estimated to have formed around 4.5 billion years ago – almost one-third of the age of the universe – through accretion from the solar nebula. Earth is the third planet from the Sun, at a distance of 1 AU or 147 million km / 91 million mi. It is the fifth-largest planet in the Solar System, being the largest of the terrestrial planets.The Crossword Solver found 30 answers to "Of the earth", 5 letters crossword clue. The Crossword Solver finds answers to classic crosswords and cryptic crossword puzzles. Enter the length or pattern for better results. Click the answer to find similar crossword clues . Enter a Crossword Clue. Measuring the Circumference of the Earth. More than 2,000 years ago Eratosthenes compared the position of the Sun’s rays in two locations to calculate the spherical size of the Earth with reasonable accuracy. Eratosthenes was born in the Greek colony Cyrene, now the city of Shahhat, Libya. As a young man, he traveled to Athens to pursue his ...Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. It is designated by the symbol ♁.Dec 7, 2022 · Claim: Earth isn't curved and doesn't rotate. Our rating: False. The Earth is curved and does rotate, and there are several ways scientists have proved this, experts say. The curvature of the ... There are more than 190 moons orbiting the planets and asteroids in our solar system, and Earth’s moon is the fifth largest of the lot. It spans about 2,160 miles across, nearly a third the ...Apr 16, 2015 · The damned ones. Revelation 6:15. And the kings of the earth, the great men, the rich men, the commanders, the mighty men, every slave and every free man, hid themselves in the caves and in the rocks of the mountains, 16 and said to the mountains and rocks, “Fall on us and hide us from the face of Him who sits on the throne and from the wrath of the Lamb! 17 For the great day of His wrath ... Facts about the Earth. 1) Earth is the third planet from the sun in our solar system. Its name comes from the the old English and Germanic words meaning ‘the ground’. 2) Our amazing planet has been around for quite some time. By researching our planet’s rocks, scientists have calculated the Earth to be around 4.5 billion years old! Nov 6, 2016 · The word "earth" means "ground" or "soil" or "the solid surface of Earth". The word "earth" has a small letter at the beginning. It sometimes needs a 'the', but sometimes is used as a 'mass noun' like 'water' or 'air'. When you say "on the earth", it is similar to saying "on the sea" or "on an island". The word "earth" means "ground" or "soil" or "the solid surface of Earth". The word "earth" has a small letter at the beginning. It sometimes needs a 'the', but sometimes is used as a 'mass noun' like 'water' or 'air'. When you say "on the earth", it is similar to saying "on the sea" or "on an island".Sep 17, 2015 · Earth’s axial tilt (or obliquity) and its relation to the rotation axis and plane of orbit. Credit: Wikipedia Commons. The Earth has an orbital period of 365.25 d ays, which is the equivalent of ... Apr 22, 2016 · When Earth is a proper noun, the is usually omitted. When you are talking about the ground or soil as a surface or stratum, then you must lowercase the word: The archaeologists excavated the earth at the site. It is acceptable to leave earth lowercase and use the with earth if you are talking about it as the planet we live on: The earth rotates ... The earth is split into four major layers: the crust, the mantle, the outer core and the inner core. The crust is what humans live on, and it consists of only one percent of the Earth's mass. The centre of the Earth is a solid ball of nickel and iron roughly 70% the size of the moon. Geologists have come a long way in terms of the collective ...While the Earth appears to be round when viewed from the vantage point of space, it is actually closer to an ellipsoid. However, even an ellipsoid does not adequately describe the Earth’s unique and ever-changing shape. Our planet is pudgier at the equator than at the poles by about 70,000 feet. earth: 1. ( often initial capital letter ) the planet third in order from the sun, having an equatorial diameter of 7926 miles (12,755 km) and a polar diameter of 7900 miles (12,714 km), a mean distance from the sun of 92.9 million miles (149.6 million km), and a period of revolution of 365.26 days, and having one satellite. May 9, 2022 · Bibliography. Earth is our home planet, the only place in the universe where we know for certain that life exists. Earth formed over 4.6 billion years ago from a swirling cloud of gas and dust ... Earth is one of the eight planets that orbit, or travel around, the sun in the solar system . It is the third planet from the sun. Earth travels around the sun at an average distance of about 93 million miles (150 million kilometers). It appears bright and bluish when seen from outer space.Jul 31, 2016 · The days are getting longer. The length of Earth's day is increasing. When Earth was formed 4.6 billion years ago, its day would have been roughly six hours long. By 620 million years ago, this had increased to 21.9 hours. Today, the average day is 24 hours long, but is increasing by about 1.7 milliseconds every century. Sep 7, 2023 · USA TODAY. A newly discovered comet will briefly illuminate the night sky before the end of the month. This is the first time in more than 400 years that Comet Nishimura will pass by the Earth ... The word "earth" means "ground" or "soil" or "the solid surface of Earth". The word "earth" has a small letter at the beginning. It sometimes needs a 'the', but sometimes is used as a 'mass noun' like 'water' or 'air'. When you say "on the earth", it is similar to saying "on the sea" or "on an island".The history of Earth is divided into four great eons, starting 4,540 mya with the formation of the planet. Each eon saw the most significant changes in Earth's composition, climate and life. Each eon is subsequently divided into eras, which in turn are divided into periods, which are further divided into epochs . Eon.Nov 11, 2019 · Starting at the center, Earth is composed of four distinct layers. They are, from deepest to shallowest, the inner core, the outer core, the mantle and the crust. Except for the crust, no one has ever explored these layers in person. In fact, the deepest humans have ever drilled is just over 12 kilometers (7.6 miles). Earth is the planet we live on, one of eight planets in our solar system and the only known place in the universe to support life. Earth is the third planet from the sun, after Mercury and Venus, and before Mars. It is about 150 million kilometers (about 93 million miles) from the sun.Add a comment. -1. Earth is an entity. The Earth is a planet. Although there is no universally accepted grammar rule regarding the usage of The before Earth but in most scenarios when pointing to Earth as a proper noun we ideally use The before it. Share. Improve this answer. Follow. answered May 19, 2016 at 9:38.Earth is the only special planet of the Solar system that contains life due to the presence of liquid water in abundance and free atmospheric oxygen. Earth has an oblate spheroidal shape. The mass of Earth is approximately 5.97x10²⁴. Earth revolves around the sun and completes its one round in 365.26 days.They estimate that Earth formed more than 4.4 billion years ago. Although no one knows when the outer crust of the planet began to form, some scientists believe that the existence of a few grains of zircon dated to about 4.4 billion years ago confirm the presence of stable continents, liquid water, and surface temperatures that were probably ...Earth is the planet we live on, one of eight planets in our solar system and the only known place in the universe to support life. Earth is the third planet from the sun, after Mercury and Venus, and before Mars. It is about 150 million kilometers (about 93 million miles) from the sun.Sep 20, 2021 · A new heaven and a new earth will replace our present earth that will be destroyed by fire (2 Peter 3:7). Many believe there will be a kind of purification process for our planet to become the new heaven and a new earth. Yet Jesus said, “Heaven and earth will pass away, but my words will never pass away” (Matthew 24:35 ESV). Earth is the only special planet of the Solar system that contains life due to the presence of liquid water in abundance and free atmospheric oxygen. Earth has an oblate spheroidal shape. The mass of Earth is approximately 5.97x10²⁴. Earth revolves around the sun and completes its one round in 365.26 days. 2 days ago · Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. It is designated by the symbol ♁. Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. It is designated by the symbol ♁.May 23, 2023 · New NASA Map Details 2023 and 2024 Solar Eclipses in the US. While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal. Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. It is designated by the symbol ♁.Therefore, the age of the Earth is approximately one-third of the age of the universe. Early Calculations . It is believed that the accretion of Earth began after the formation of the calcium-aluminum-rich inclusions and the meteorites. It is also estimated that these calcium-aluminum-rich inclusions are approximately 4.567 billion years old.This process created our solar system's asteroids, comets, planets and moons. Earth's rocky core formed first, with heavy elements colliding and binding together. Dense material sank to the ...May 23, 2023 · Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. Earth is special because it is an ocean planet. Water covers 70% of Earth's surface. Earth's atmosphere is made mostly of nitrogen and has plenty of oxygen for us to breathe.

The Crossword Solver found 30 answers to "Of the earth", 5 letters crossword clue. The Crossword Solver finds answers to classic crosswords and cryptic crossword puzzles. Enter the length or pattern for better results. Click the answer to find similar crossword clues . Enter a Crossword Clue. . Unblocked papapercent27s cheeseria

the earth

In 1862, the physicist William Thomson, 1st Baron Kelvin published calculations that fixed the age of Earth at between 20 million and 400 million years. He assumed that Earth had formed as a completely molten object, and determined the amount of time it would take for the near-surface temperature gradient to decrease to its present value. earth: 1. ( often initial capital letter ) the planet third in order from the sun, having an equatorial diameter of 7926 miles (12,755 km) and a polar diameter of 7900 miles (12,714 km), a mean distance from the sun of 92.9 million miles (149.6 million km), and a period of revolution of 365.26 days, and having one satellite. Meet the artist. Sarah Jacoby is an illustrator and a production designer at Tinybop. The landscape she created to represent our planet in The Earth was a 32-foot long Photoshop file. But the biggest challenge wasn’t scale, it was figuring out an interesting and colorful way to draw dirt. Learn more about Sarah in our interview.Download Google Earth in Apple App Store Download Google Earth in Google Play Store Launch Earth. keyboard_arrow_down. Create stories and maps. With creation tools, you can draw on the map, add ... USA TODAY. A newly discovered comet will briefly illuminate the night sky before the end of the month. This is the first time in more than 400 years that Comet Nishimura will pass by the Earth ...0.0408% carbon dioxide [28] ~ 1% water vapor ( climate variable) Earth is the third planet from the Sun in the Solar System. It is the only planet known to have life on it. The Earth formed about 4.5 billion years ago. [29] [30] It is one of four rocky planets on the inner side of the Solar System.Aug 24, 2023 · All About Earth. Since we live here, you might think we know all there is to know about Earth. Not at all, actually! We have a lot we can learn about our home planet. Learn more about Earth and all the planets in our solar system. Play. Go With the Flow! Earth's density is 5.513 grams per cubic centimeter, according to NASA. Earth is the densest planet in the solar system because of its metallic core and rocky mantle. Jupiter, which is 318 more ...NASA.gov brings you the latest images, videos and news from America's space agency. Get the latest updates on NASA missions, watch NASA TV live, and learn about our quest to reveal the unknown and benefit all humankind.18 hours ago · How did researchers determine the meteorite's age? Krestianinov and his colleagues analyzed lead and uranium isotopes in Erg Chech 002 and determined its lead-isotopic age as about 4.566 billion ... A study published last year found that 1.27 million people died in 2019 from infections resistant to antimicrobial drugs. The annual death toll could reach 10 million by 2050, according to the ...1. Earth’s non-mythological etymology is unique among planets. Earth is the only planet in our solar system that doesn’t get its name from Greek or Roman mythology.17 hours ago · A study published last year found that 1.27 million people died in 2019 from infections resistant to antimicrobial drugs. The annual death toll could reach 10 million by 2050, according to the ... From the Earth Missouri dispensaries offer curbside pickup and delivery services in select areas, including Downtown, Westside, Brookside, Independence, and Raytown. Other things to note: To guarantee a smooth ride, please ensure exact change on hand, as drivers can only provide up to $5 in change.With Google Earth for Chrome, fly anywhere in seconds and explore hundreds of 3D cities right in your browser. Roll the dice to discover someplace new, take a guided tour with Voyager, and create ...In 1862, the physicist William Thomson, 1st Baron Kelvin published calculations that fixed the age of Earth at between 20 million and 400 million years. He assumed that Earth had formed as a completely molten object, and determined the amount of time it would take for the near-surface temperature gradient to decrease to its present value..

Popular Topics