User:Ocaasi/The Wikipedia Game/Article progress

Draft 1 - typos
The Earth is the thurd planet from the Sun. It is one of the fore terrestrial planets in hour Solar System. This means most of its mass is solid. The other tree are Mercury, Mars. The Earth is also called the Blue Planet, "Planet Earth", and "Terra".

The Earth is home to millions of species of plants and aminals, including huhmans.

Draft 1 - fixed
The Earth is the third planet from the Sun. It is one of the four terrestrial planets in hour Solar System. This means most of its mass is solid. The other three are Mercury, Mars. The Earth is also called the Blue Planet, "Planet Earth", and "Terra".

The Earth is home to millions of species of plants and animals, including humans.

Draft 2 - NPOV content problem
The Earth is the third planet from the Sun. It is one of the four terrestrial planets in hour Solar System. This means most of its mass is solid. The other three are Mercury, Mars. The Earth is also called the Blue Planet, "Planet Earth", and "Terra".

The Earth is home to millions of species of plants and animals, including humans. Earth is the best and coolest planet in the whole galaxy. Earth is a place that's perfect for humans to live.

Draft 3 - NPOV content fixed
The Earth is the third planet from the Sun. It is one of the four terrestrial planets in hour Solar System. This means most of its mass is solid. The other three are Mercury, Mars. The Earth is also called the Blue Planet, "Planet Earth", and "Terra".

The Earth is home to millions of species of plants and animals, including humans. Earth is the only planet in the galaxy known to support life. Earth has many places that are suitable for humans to live in, although some areas of the planet can be very dangerous, too.

Draft 4 - Source added
The Earth is the third planet from the Sun. It is one of the four terrestrial planets in hour Solar System. This means most of its mass is solid. The other three are Mercury, Mars. The Earth is also called the Blue Planet, "Planet Earth", and "Terra".

The Earth is home to millions of species of plants and animals, including humans. Earth is the only planet in the galaxy known to support life. Earth has many places that are suitable for humans to live in, although some areas of the planet can be very dangerous, too.

About 71% of Earth's surface is covered in salt water oceans. Earth is the only place in the Solar System where liquid water is known to exist at present.

Draft 5 - Expanded
The Earth is the third planet from the Sun. It is one of the four terrestrial planets in our Solar System. This means most of its mass is solid. The other three are Mercury, Venus, and Mars. The Earth is also called the Blue Planet, "Planet Earth", and "Terra".

The Earth is home to millions of species of plants and animals, including humans. Earth is the only planet in the galaxy known to support life. Earth has many places that are suitable for humans to live in, although some areas of the planet can be very dangerous, too.

About 71% of Earth's surface is covered in salt water oceans. Earth is the only place in the Solar System where liquid water is known to exist at present. The other 29% is made of rocky land in the shape of continents and islands. Earth interacts with other objects in the Solar System, particularly the Sun and the Moon. The Earth orbits or goes around the Sun roughly once every 365.25 days. One spin is called a day and one orbit around the Sun is called a year. This is why there are 365 days in a year. Earth has only one moon, known as the Moon.

History

The Earth and the other planets formed about 4.6 - 4.8 billion years ago. They were made of the leftover gas from the nebula that made the Sun. The Moon may have been formed after a collision between Earth and a smaller planet (sometimes called Theia). Scientists believe that parts of both planets broke off — becoming (by gravity) the Moon. Condensing water vapour, comets and asteroids hitting the Earth made the oceans. Within a billion years (that is at about 3.8 billion years ago) the first life evolved, in the Archaean era. Some bacteria developed photosynthesis, which lets plants make food from the Sun's light and water. This released a lot of oxygen into the atmosphere or air, making the Earth's surface suitable for life. This oxygen also formed the ozone layer which protects the Earth from bad ultraviolet radiation from the Sun. This protection made it possible for things to move from the deep ocean to the surface. Long ago almost all land was in one place. This is called a supercontinent. The earliest known supercontinent was called Rodina. Scientists think that soon after this there was a time (the Cryogenian) when the Earth was almost entirely covered by thick ice sheets (glaciers). This is called the Snowball Earth theory.

What it is made of

Earth is a terrestrial planet. This means it is made up of solid rock unlike a gas giant such as Jupiter. It is the largest out of the four terrestrial planets in mass and diameter.

Shape

The Earth's shape is an oblate spheroid. This means it is basically a sphere but it bulges around the middle. The circumference of the Earth is about 40,000 kilometers; the average width of the Earth is about 12,700 km. The highest point on Earth is the peak of Mount Everest at 8,848 m above sea level. The lowest natural point is the bottom of the Mariana Trench at 10,911 meters below sea level. Because of the bulge at the middle or the equator, the farthest point from the Earth's center is the top of Mount Chimborazo in Ecuador.

Internal structure Inside, the Earth is similar to the other terrestrial planets. It has an outer, solid rock layer called the crust. Everything that lives on Earth is on top of the crust. Below that is a layer of thick, semi-liquid rock called the mantle. Under that is a thin liquid layer called the outer core and then the solid iron inner core. The thickness of the crust changes. On land the average is between 30–50 kilometers thick. Under the oceans in some places it is only 6 kilometers thick. The inside of the Earth is very hot, the temperature of the outer core may be as high as 7000 °C.

Tectonic plates The Earth is the only terrestrial planet with active plate tectonics.Due to plate tectonics the Earth's crust basically floats on the thick liquid rock of the mantle below. The crust is split up into parts called plates. These plates interact as they move about causing earthquakes and creating volcanoes and mountain ranges. The place where plates meet are called plate boundaries. There are three types of plate boundary: constructive, destructive and transform.

Surface

The Earth changes greatly from place to place. Over 70% of the Earth surface is covered by water. The underwater surface has many of the same features as the above sea with volcanos, mountains and trenches or canyons. The 30% not covered by water is mostly forests, deserts, plains, mountains and plateaux. Human civilisation has led to increasing urbanisation — the growth of cities. Many things can change the surface of the Earth. Plate tectonics is main cause of change but there are others such as erosion from wind and rain, erosion by the oceans or meteorite impacts. There are three main types of rock that make up the Earth's surface: Igneous rock is made when magma or lava from the mantle reaches the surface and cools. As it gets colder it turns into rock or solidifies. Sedimentary rock is made from sediment, like sand or small bits of other rock, that has been crushed and packed tightly together. Metamorphic rock which is made when either of the other two types are changed by high or low temperatures and pressures.

Hydrosphere

All the water on Earth, on land or in the atmosphere, is part of the hydrosphere. About 97.5% of all water is salt water. About half the fresh water is currently ice. The oceans absorb or soak up carbon dioxide, a gas that adds to the greenhouse effect and global warming.

Atmosphere

A planet's atmosphere is a layer of different gases surrounding it. It is kept there by gravity. The Earth's atmosphere is made of about 78% nitrogen, 21% oxygen and small amounts of other gases. This mixture is often called air. Further up there is a layer of ozone gas called the Ozone layer. Ozone absorbs ultraviolet radiation from the Sun. Ultraviolet radiation is dangerous to people, so without the Ozone layer life would not be possible. The atmosphere also protects the earth from crashes with meteors and small asteroids. This is because they burn up due to all the friction as they fly through it. It also helps to keep Earth warm. Some gases including carbon dioxide and methane act like a blanket around the Earth, they trap heat under them, keeping the Earth warm. This is called the natural greenhouse effect. When humans build factories and power plants to make electricity, combustion is involved. Combustion lets out a lot of carbon dioxide. This carbon dioxide goes up into the atmosphere and traps more heat. This is called global warming.

Weather, climate, and water cycle Hot air rises. As it rises it gets colder again and falls. This is called currents. When hot air meets cold air different weather effects happen. Convection currents are the cause of almost all weather on Earth. When it gets hot on the surface water evaporates and becomes steam or water vapour. This hot water vapour rises. As it rises it gets colder. When it gets cold enough it turns back into water again. This causes the clouds and rain. It is called the water cycle.

Orbit and rotation The Earth takes about 24 hours to complete one day and about 365 days to complete a year. Actually, the Earth take 365.24 days to revolve around the sun. After every four years, an extra day is added, and the year has 366 days. This is a leap year. The Earth is, on average, 150 million kilometers away from the Sun, and moving at a speed of 30 kilometers a second or 108,000 miles an hour. The Moon orbits the Earth at an average distance of 250,000 miles. It is tidally locked to Earth, which means it always has the same side facing the Earth. It takes roughly one month to complete one orbit. The Earth is part of the Solar System and orbits the sun along with thousands of small objects and eight planets. The Sun, and therefore the Solar System, are currently traveling through the Orion Arm of the Milky Way Galaxy and will be for approximately the next 10,000 years.

Draft 6 - blanked sections
The is the from the. It is one of the in. The other three are. The Earth is also called the, " ", and " ".

The Sun, and therefore the Solar System, are currently traveling through the Orion Arm of the Milky Way Galaxy and will be for approximately the next 10,000 years.

Complete article
The Earth  is the third planet from the Sun.

It is one of the four terrestrial planets in our Solar System. This means most of its mass is solid. The other three are Mercury, Venus and Mars.

The Earth is also called the Blue Planet, 'Planet Earth', and 'Terra'.

The Earth is home to millions of species of plants and animals, including humans. Earth is the only place in the universe where life has been confirmed to exist.

Science shows that the Earth formed around 4.5 billion years ago. The things that live on Earth have completely changed its air (atmosphere); this is called a biosphere.

About 71% of Earth's surface is covered in salt water oceans. Earth is the only place in the Solar System where liquid water is known to exist at present.

The other 29% is made of rocky land in the shape of continents and islands. Earth interacts with other objects in the Solar System, particularly the Sun and the Moon. The Earth orbits or goes around the Sun roughly once every 365.25 days. One spin is called a day and one orbit around the Sun is called a year. This is why there are 365 days in a year. Earth has only one moon, known as the Moon.

About 71% of Earth's surface is covered in salt water oceans. Earth is the only place in the Solar System where liquid water is known to exist at present. The other 29% is made of rocky land in the shape of continents and islands. Earth interacts with other objects in the Solar System, particularly the Sun and the Moon. The Earth orbits or goes around the Sun roughly once every 365.25 days. One spin is called a day and one orbit around the Sun is called a year. This is why there are 365 days in a year. Earth has only one moon, known as the Moon.

History

The Earth and the other planets formed about 4.6 - 4.8 billion years ago. They were made of the leftover gas from the nebula that made the Sun. The Moon may have been formed after a collision between Earth and a smaller planet (sometimes called Theia). Scientists believe that parts of both planets broke off — becoming (by gravity) the Moon. Condensing water vapour, comets and asteroids hitting the Earth made the oceans. Within a billion years (that is at about 3.8 billion years ago) the first life evolved, in the Archaean era. Some bacteria developed photosynthesis, which lets plants make food from the Sun's light and water. This released a lot of oxygen into the atmosphere or air, making the Earth's surface suitable for life. This oxygen also formed the ozone layer which protects the Earth from bad ultraviolet radiation from the Sun. This protection made it possible for things to move from the deep ocean to the surface. Long ago almost all land was in one place. This is called a supercontinent. The earliest known supercontinent was called Rodina. Scientists think that soon after this there was a time (the Cryogenian) when the Earth was almost entirely covered by thick ice sheets (glaciers). This is called the Snowball Earth theory.

What it is made of

Earth is a terrestrial planet. This means it is made up of solid rock unlike a gas giant such as Jupiter. It is the largest out of the four terrestrial planets in mass and diameter.

Shape

The Earth's shape is an oblate spheroid. This means it is basically a sphere but it bulges around the middle. The circumference of the Earth is about 40,000 kilometers; the average width of the Earth is about 12,700 km. The highest point on Earth is the peak of Mount Everest at 8,848 m above sea level. The lowest natural point is the bottom of the Mariana Trench at 10,911 meters below sea level. Because of the bulge at the middle or the equator, the farthest point from the Earth's center is the top of Mount Chimborazo in Ecuador.

Internal structure Inside, the Earth is similar to the other terrestrial planets. It has an outer, solid rock layer called the crust. Everything that lives on Earth is on top of the crust. Below that is a layer of thick, semi-liquid rock called the mantle. Under that is a thin liquid layer called the outer core and then the solid iron inner core. The thickness of the crust changes. On land the average is between 30–50 kilometers thick. Under the oceans in some places it is only 6 kilometers thick. The inside of the Earth is very hot, the temperature of the outer core may be as high as 7000 °C.

Tectonic plates The Earth is the only terrestrial planet with active plate tectonics.Due to plate tectonics the Earth's crust basically floats on the thick liquid rock of the mantle below. The crust is split up into parts called plates. These plates interact as they move about causing earthquakes and creating volcanoes and mountain ranges. The place where plates meet are called plate boundaries. There are three types of plate boundary: constructive, destructive and transform.

Surface

The Earth changes greatly from place to place. Over 70% of the Earth surface is covered by water. The underwater surface has many of the same features as the above sea with volcanos, mountains and trenches or canyons. The 30% not covered by water is mostly forests, deserts, plains, mountains and plateaux. Human civilisation has led to increasing urbanisation — the growth of cities. Many things can change the surface of the Earth. Plate tectonics is main cause of change but there are others such as erosion from wind and rain, erosion by the oceans or meteorite impacts. There are three main types of rock that make up the Earth's surface: Igneous rock is made when magma or lava from the mantle reaches the surface and cools. As it gets colder it turns into rock or solidifies. Sedimentary rock is made from sediment, like sand or small bits of other rock, that has been crushed and packed tightly together. Metamorphic rock which is made when either of the other two types are changed by high or low temperatures and pressures.

Hydrosphere

All the water on Earth, on land or in the atmosphere, is part of the hydrosphere. About 97.5% of all water is salt water. About half the fresh water is currently ice. The oceans absorb or soak up carbon dioxide, a gas that adds to the greenhouse effect and global warming.

Atmosphere

A planet's atmosphere is a layer of different gases surrounding it. It is kept there by gravity. The Earth's atmosphere is made of about 78% nitrogen, 21% oxygen and small amounts of other gases. This mixture is often called air. Further up there is a layer of ozone gas called the Ozone layer. Ozone absorbs ultraviolet radiation from the Sun. Ultraviolet radiation is dangerous to people, so without the Ozone layer life would not be possible. The atmosphere also protects the earth from crashes with meteors and small asteroids. This is because they burn up due to all the friction as they fly through it. It also helps to keep Earth warm. Some gases including carbon dioxide and methane act like a blanket around the Earth, they trap heat under them, keeping the Earth warm. This is called the natural greenhouse effect. When humans build factories and power plants to make electricity, combustion is involved. Combustion lets out a lot of carbon dioxide. This carbon dioxide goes up into the atmosphere and traps more heat. This is called global warming.

Weather, climate, and water cycle Hot air rises. As it rises it gets colder again and falls. This is called currents. When hot air meets cold air different weather effects happen. Convection currents are the cause of almost all weather on Earth. When it gets hot on the surface water evaporates and becomes steam or water vapour. This hot water vapour rises. As it rises it gets colder. When it gets cold enough it turns back into water again. This causes the clouds and rain. It is called the water cycle.

Orbit and rotation The Earth takes about 24 hours to complete one day and about 365 days to complete a year. Actually, the Earth take 365.24 days to revolve around the sun. After every four years, an extra day is added, and the year has 366 days. This is a leap year. The Earth is, on average, 150 million kilometers away from the Sun, and moving at a speed of 30 kilometers a second or 108,000 miles an hour. The Moon orbits the Earth at an average distance of 250,000 miles. It is tidally locked to Earth, which means it always has the same side facing the Earth. It takes roughly one month to complete one orbit. The Earth is part of the Solar System and orbits the sun along with thousands of small objects and eight planets. The Sun, and therefore the Solar System, are currently traveling through the Orion Arm of the Milky Way Galaxy and will be for approximately the next 10,000 years.