Earth is the third planet from the sun and the only astronomical object known to harbor and support life
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Earth is the third planet from the Sun and the only place known to support life. Around 29% of Earth's surface is land consisting of continents and islands, while the remaining 71% is covered by oceans, seas, lakes and rivers. Earth's outer layer is made up of tectonic plates that migrate over millions of years, and its interior remains active with a solid iron core and convecting mantle. Earth's atmosphere consists mainly of nitrogen and oxygen, and greenhouse gases play an important role in regulating surface temperatures. The Moon stabilizes Earth's orientation and causes ocean tides, and Earth orbits the Sun in 365 days. Life first appeared on Earth over 4 billion years ago and has since evolved into many species, though
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![Earth is the third planet from the Sun and the only astronomical object known to harbor and support
life. 29.2% of Earth's surface is land consisting of continents and islands. The remaining 70.8% is
covered with water, mostly by oceans, seas, gulfs, and other salt-water bodies, but also by lakes,
rivers, and another freshwater, which together constitute the hydrosphere. Much of Earth's polar
regions are covered in ice. Earth's outer layer is divided into several rigid tectonic plates[list] that
migrate across the surface over many millions of years, while its interior remains active with a solid
iron inner core, a liquid outer core that generates Earth's magnetic field, and a convective mantle
that drives plate tectonics.
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Earth's atmosphere consists mostly of nitrogen and oxygen. More solar energy is received by tropical
regions than polar regions and is redistributed by atmospheric and ocean circulation. Greenhouse
gases also play an important role in regulating surface temperature. A region's climate is not only
determined by latitude, but also by elevation and proximity to moderating oceans, among other
factors. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in most
areas and greatly impacts life.
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Earth's gravity interacts with other objects in space, especially the Moon, which is Earth's only
natural satellite. Earth orbits around the Sun in about 365.25 days. Earth's axis of rotation is tilted
concerning its orbital plane, producing seasons on Earth. The gravitational interaction between Earth
and the Moon causes tides, stabilizes Earth's orientation on its axis, and gradually slows its rotation.
Earth is the densest planet in the Solar System and the largest and most massive of the four rocky
planets.
According to radiometric dating estimation and other evidence, Earth formed over 4.5 billion years
ago. Within the first billion years of Earth's history, life appeared in the oceans and began to affect
Earth's atmosphere and surface, leading to the proliferation of anaerobic and, later, aerobic
organisms. Some geological evidence indicates that life may have arisen as early as 4.1 billion years
ago. Since then, the combination of Earth's distance from the Sun, physical properties, and geological
history have allowed life to evolve and thrive. In the history of life on Earth, biodiversity has gone
through long periods of expansion, occasionally punctuated by mass extinctions. More than 99% of
all species that ever lived on Earth are extinct. Almost 8 billion humans live on Earth and depend on
its biosphere and natural resources for their survival. Humans increasingly impact Earth's surface,
hydrology, atmospheric processes, and other life.
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Here are the answers to your questions:
1. The different spheres of Earth are: Atmosphere, Biosphere, Hydrosphere, Lithosphere, Anthrosphere.
2. Atmosphere is the envelope of air surrounding the Earth. It has four main layers - Troposphere, Stratosphere, Mesosphere, Thermosphere. Troposphere is where we live. Stratosphere contains ozone layer which protects us from UV rays.
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The document describes Earth's spheres which include:
- The geosphere (solid rocky part including crust and mantle)
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- Cryosphere (frozen water parts like ice and glaciers)
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It explains that matter and energy constantly cycle between these spheres, and their interactions are essential for life on Earth. The spheres work together as a complex, interconnected system.
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Earth as a system is composed of numerous interacting parts or subsystem. Earth system science attempts to integrate the knowledge from traditional sciences, geology, atmospheric science, chemistry, biology and so on. Earth is just a small part of larger system known as the solar system.
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The document discusses the four interconnected spheres that make up Earth's systems - the geosphere (solid Earth), hydrosphere (water), atmosphere (air), and biosphere (living things). It notes that the Earth is a complex system of interacting rock, water, air and life and provides an example of how a sewage overflow during a storm can impact all four spheres through their interactions.
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The document discusses Earth's four main subsystems - the atmosphere, lithosphere, hydrosphere, and biosphere. It provides basic definitions and descriptions of each subsystem. For example, it states that the atmosphere is made up of 78% nitrogen and 21% oxygen. It also discusses interactions between the subsystems, like how the biosphere is made up of biomes where similar plants and animals live together. The document includes tasks for students, like drawing a scenario showing the subsystems interacting and explaining their importance to Earth's systems.
Jc
Water is a chemical substance with the formula H2O that can exist as a solid, liquid, or gas. It is transparent and allows sunlight to reach aquatic plants and is the major component of cells. The water cycle is driven by the sun and involves evaporation, condensation, precipitation, runoff, infiltration, groundwater discharge and springs. Ocean surface topography varies in a similar way to land topography and influences ocean currents, heat transport, and sea level changes. Tides are caused by gravitational forces from the moon and sun, resulting in two high and two low tides daily in most coastal areas. Human pollution and development are deteriorating ocean ecosystems.
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Similar to Earth is the third planet from the sun and the only astronomical object known to harbor and support life
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The gravitational attraction between Earth and the Moon causes tides on Earth. The same effect on the Moon has led to its tidal locking: its rotation period is the same as the time it takes to orbit Earth. As a result, it always presents the same face to the planet. As the Moon orbits Earth, different parts of its face are illuminated by the Sun, leading to the lunar phases; the dark part of the face is separated from the light part by the solar terminator.
Details of the Earth–Moon system, showing the radius of each object and the Earth–Moon barycenter. The Moon's axis is located by Cassini's third law.
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The Moon may have dramatically affected the development of life by moderating the planet's climate. Paleontological evidence and computer simulations show that Earth's axial tilt is stabilized by tidal interactions with the Moon.[28] Some theorists think that without this stabilization against the torques applied by the Sun and planets to Earth's equatorial bulge, the rotational axis might be chaotically unstable, exhibiting chaotic changes over millions of years, as appears to be the case for Mars.[223]
Viewed from Earth, the Moon is just far enough away to have almost the same apparent-sized disk as the Sun. The angular size (or solid angle) of these two bodies match because, although the Sun's diameter is about 400 times as large as the Moon's, it is also 400 times more distant.[186] This allows total and annular solar eclipses to occur on Earth.
The most widely accepted theory of the Moon's origin, the giant-impact hypothesis, states that it formed from the collision of a Mars-size protoplanet called Theia with the early Earth. This hypothesis explains (among other things) the Moon's relative lack of iron and volatile elements and the fact that its composition is nearly identical to that of Earth's crust.[224]
How planet earth works
This article presents how planet Earth was born, how it operates and how it is protected from threats coming from outer space. In addition to showing how the Earth operates as a dynamic system, it shows how our planet will disappear completely when the Sun migrates out of Earth's orbit in about 1 billion years.
Earth
Earth is the third planet from the Sun and the only known planet capable of supporting life. It formed over 4 billion years ago and is a terrestrial planet with significant geological activity like plate tectonics. Earth's atmosphere and oceans were formed by outgassing and volcanic activity and water vapor in the atmosphere condensed to form the oceans. Life first appeared on Earth around 3.5 billion years ago and the planet's biosphere has significantly altered conditions on the surface enabling the proliferation of complex life. Earth interacts gravitationally and magnetically with the Moon and Sun.
Moon
The Moon is Earth's only natural satellite and orbits about 384,400 km away. It has a diameter of 3,474.8 km and is tidally locked so the same side always faces Earth. The Moon was formed from debris after a collision between Earth and a Mars-sized object. Its gravitational pull causes ocean tides on Earth and its stabilizing effect on Earth's axis may have enabled the development of complex life.
THE EARTH
The Earth formed around 4.5 billion years ago. It is the third planet from the sun and the only known planet capable of supporting life. The Earth has a molten iron core, a solid mantle, and a crust divided into tectonic plates that migrate across the surface over millions of years. Over 70% of the Earth's surface is covered by water and life first appeared in the oceans around 1 billion years after the Earth formed. Approximately 8.74 million species currently inhabit the Earth, including billions of humans who depend on the biosphere and minerals.
THE EARTH
The Earth formed around 4.5 billion years ago. It is the third planet from the sun and the only known planet capable of sustaining life. The Earth has a molten iron core, a solid silicate mantle, and a crust consisting of tectonic plates that migrate across the surface over millions of years. The Earth's atmosphere, hydrosphere, and biosphere support around 8.7 million known species of life. Humans depend on the biosphere and minerals of the Earth, though pollution poses threats to both the environment and human health.
Earth plate tectonics, divergent and convergent.pptx
Earth is approximately 4.5 billion years old, formed at the same time as the solar system from a solar nebula. Over its history, geological events like volcanic eruptions, plate collisions, and mountain building have shaped Earth's surface. Approximately 70.8% of Earth is covered by water, while the solid crust makes up the remaining portion of the planet. Earth has a layered structure that includes the crust, mantle, outer core, and inner core.
History of the Earth.pptx
The document provides a summary of the history of Earth from its formation to the present day. It describes how Earth formed around 4.54 billion years ago from a solar nebula, and over time developed a solid crust and liquid water on its surface. Early life first appeared between 3.5 to 4 billion years ago in the form of microbes like bacteria and stromatolites. The first complex multicellular organisms emerged around 580 million years ago in an event known as the Cambrian explosion, marking the rise of most major phyla. Life has continued to evolve on Earth, with species adapting and going extinct over geological eras as environments changed.
how many people are on this planet earth-SolutionEarth- also known as.docx
how many people are on this planet earth?
Solution
Earth, also known as the world, Terra, or Gaia, is the third planet from the Sun, the densest planet in the Solar System, the largest of the Solar System\'s four terrestrial planets, and the only celestial body known to accommodate life. It is home to about 8.74 million species. There are over 7.2 billion humans who depend upon its biosphere and minerals. The Earth\'s human population is divided among about two hundred independent states that interact through diplomacy, conflict, travel, trade, and media. According to evidence from sources such as radiometric dating, Earth was formed around four and a half billion years ago. Within its first billion years, life appeared in its oceans and began to affect its atmosphere and surface, promoting the proliferation of aerobic as well as anaerobic organisms and causing the formation of the atmosphere\'s ozone layer. This layer and Earth\'s magnetic field block the most life-threatening parts of the Sun\'s radiation, so life was able to flourish on land as well as in water. Since then, Earth\'s position in the Solar System, its physical properties and its geological history have allowed life to persist
.
History and formation of the Earth (Presentation #2 Bilogy L2 project)
The Earth formed 4.54 billion years ago from a solar nebula. Its early atmosphere was toxic and volcanic activity and asteroid impacts were common. One large impact is believed to have formed the Moon. Over billions of years the planet cooled and developed tectonic plates and a stable crust allowing liquid water and the first life. The atmosphere gradually gained oxygen as photosynthetic life evolved. Multicellular life diversified in the Phanerozoic Eon starting over 500 million years ago, though many species died out in extinction events like the one that ended the Cretaceous Period.
The Planet Earth
The document provides information about the key characteristics of planet Earth. It discusses that Earth is the third planet from the sun, has an atmosphere with oxygen and liquid water, and is the only known planet capable of supporting life. It also describes Earth's size, composition, layers of the atmosphere, formation, rotation, seasons, and climate.
ORIGIN & STRUCTURE OF THE EARTH..module 1.pptx
Earth is unique in the known universe for its ability to harbor life. It has a molten nickel-iron core that generates a protective magnetic field and an atmosphere that shields the planet from harmful solar radiation. There are four key factors that make Earth habitable - suitable temperature, an atmosphere, sources of energy, and availability of nutrients. Earth occupies the narrow temperature range required for liquid water to exist and has an atmosphere that provides insulation. It receives energy from the sun and has water and geological cycles that distribute nutrients across the planet, supporting life.
EARTH-SUBSYSTEMS.pdf
Earth is the third planet from the sun and the only known place in the universe to support life. It has liquid water, exists within the sun's habitable zone, and its atmosphere contains oxygen and protects it from radiation. Key factors that make Earth habitable include its distance from the sun, system of plate tectonics, size and protective moon. The four interacting spheres that comprise Earth's system are the atmosphere, biosphere, hydrosphere and geosphere.
Lesson 1 earth as unique planet
The document discusses key characteristics of Earth that support life. It describes Earth's location in the solar system, its atmosphere composed primarily of nitrogen, its size and mass that maintain gravity and the atmosphere. It also discusses Earth's magnetic field, generated by electric currents in the molten iron core, which shields the planet from solar winds. Finally, it notes the crucial presence of water, which exists in all three states and has a cooling effect through the hydrologic cycle.
Earth structure
1) The document discusses the internal structure of the Earth, describing its four main layers from innermost to outermost - the inner core, outer core, mantle, and crust.
2) It provides details on the composition and thickness of each layer, noting that the inner core is solid iron and nickel, the outer core is liquid iron and nickel, the mantle is thick and molten, and the crust varies in thickness on land and ocean floors.
3) In closing, it emphasizes the importance of protecting the Earth's environment and resources for sustaining life.
module-1-characteristics-of-earth-that-are-necessary-to-support-life-presenta...
The document discusses the key characteristics of Earth that are necessary to support life. It explains that Earth has liquid water, a heat source from both internal and external processes, an atmosphere that traps heat and protects from radiation, a supply of energy from the Sun in the Goldilocks zone, strong magnetic field that shields the planet, nutrients that are circulated by geological processes and water cycles, and tectonic plates that regulate heat from the core and protect the surface. These unique characteristics have allowed life to thrive on Earth.
Earth and-earthquakes
The document provides an overview of Earth, its atmosphere, and its place in the solar system. It describes Earth's composition, unique characteristics that support life, and ongoing geological changes. It discusses Earth's orbit and rotation, seasons, and atmospheric layers. Recent space exploration has increased understanding of Earth and how it compares to other planets and moons in the solar system.
Earth-and-Life-Science-Q1-Week-1.pdf
The document discusses the uniqueness of Earth and its subsystems. It explains that Earth is the only planet in the solar system that can support life due to factors like being located in the sun's habitable zone and having liquid water. The document then describes Earth's four subsystems - the geosphere, hydrosphere, atmosphere, and biosphere - and how they interact with each other. For example, it notes how the atmosphere and hydrosphere exchange heat and moisture through the water cycle.
Chapter 2 Earth As Planet
The document discusses the phases of the moon. It explains that the moon does not produce its own light, but rather reflects light from the sun. As the moon orbits Earth, different portions are illuminated by the sun, appearing to change shape from our perspective on Earth. This cycle, where the illuminated portion appears to grow and then shrink over the course of around 29.5 days, is what causes the phases of the moon. The document then defines and provides images for each of the 8 main phases: new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, and waning crescent.
ээлжит хичээлийн хэрэглэгдхүүн 2
Earth is the third planet from the Sun and the densest of the terrestrial planets. It is the only known place where life exists, and life first appeared on Earth around 4.54 billion years ago. The proliferation of life has significantly altered Earth's atmosphere and conditions, enabling the formation of an ozone layer that shields life from solar radiation and allows life to exist on land.
Similar to Earth is the third planet from the sun and the only astronomical object known to harbor and support life (20)
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how many people are on this planet earth-SolutionEarth- also known as.docx
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History and formation of the Earth (Presentation #2 Bilogy L2 project)
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