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The Earth has a layered structure made up of crust, mantle, outer core and inner core. ... This was a was a revolutionary theory suggesting that continents shift position on the Earth's surface.
Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering 70.8% of Earth's crust.
- Namesake. The name Earth is at least 1,000 years old. All of the planets, except for Earth, were named after Greek and Roman gods and goddesses. However, the name Earth is a Germanic word, which simply means “the ground.”
- Potential for Life. Earth has a very hospitable temperature and mix of chemicals that have made life abundant here. Most notably, Earth is unique in that most of our planet is covered in liquid water, since the temperature allows liquid water to exist for extended periods of time.
- Size and Distance. With an equatorial diameter of 7926 miles (12,760 kilometers), Earth is the biggest of the terrestrial planets and the fifth largest planet in our solar system.
- Orbit and Rotation. As Earth orbits the Sun, it completes one rotation every 23.9 hours. It takes 365.25 days to complete one trip around the Sun. That extra quarter of a day presents a challenge to our calendar system, which counts one year as 365 days.
- The Crust
- The Mantle
- The CORE
The crust is the outer layer of the Earth. It is the thinnest layer of the earth compared to the other layers. Its thickness varies from 5 kilometers in the ocean floor to about 70 kilometers on the land surface. The crust is subdivided into huge plates that float into the next layer of the earth (mantle). The plates are constantly moving but at a ...
The mantle is under the crust and is approximately 2,890 kilometers deep. It is by far the thickest layers and accounts for 85% of the volume of the Earth. The layer can be divided into upper and lower mantles. The great pressure on the lower mantle makes it completely solid while the upper mantle, also known as the asthenosphere, is liquid and flo...
The Earth’s core is divided into inner and outer cores. Both cores are mainly made up of iron and nickel. The difference between the inner core and the outer core is that the mineral in the inner core is solid while those in the outer core are liquid. The inner core is as hot as the sun but because of the pressure from the weight of the earth pushi...
- John Misachi
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 harbor life. Learn more about development and composition of Earth in this article.
- Earth is the third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its near-surface environments ar...
- Earth is located in the Orion-Cygnus Arm, one of the four spiral arms of the Milky Way, which lies about two-thirds of the way from the centre of t...
- Earth’s name in English, the international language of astronomy, derives from Old English and Germanic words for ground and earth, and it is the o...
- Earth and the other planets in the solar system formed about 4.6 billion years ago. The early Earth had no ozone layer and no free oxygen, lacked o...
- Viewed from another planet, Earth would appear bright and bluish in colour. In latitudinal belts, swirling white cloud patterns of midlatitude and...
Core, mantle, and crust are divisions based on composition. The crust makes up less than 1 percent of Earth by mass, consisting of oceanic crust and continental crust is often more felsic rock. The mantle is hot and represents about 68 percent of Earth’s mass. Finally, the core is mostly iron metal. The core makes up about 31% of the Earth.
Dec 8, 2023 · It is the innermost layer surrounding the earth’s centre. The core is separated from the mantle by Guttenberg’s Discontinuity. It is composed mainly of iron (Fe) and nickel (Ni) and hence it is also called as NIFE. The core constitutes nearly 15% of earth’s volume and 32.5% of earth’s mass.
