The Sahara Desert is the largest hot desert in the world, covering an area of approximately 9.2 million square kilometers in North Africa. It is known for its vast and desolate landscape, characterized by a variety of landforms, including rocky outcrops, gravel plains, and sand seas.
Sand sheets and dunes are the two main types of sand deposits found in the Sahara Desert. Sand sheets are flat areas covered by sand that are typically less than 10 meters thick. Dunes, on the other hand, are hills or ridges of sand that are formed by wind erosion and deposition. Dunes can be found in various shapes and sizes, ranging from small crescent-shaped dunes to massive star-shaped dunes that can reach up to 500 meters in height.Estimating the percentage of the Sahara Desert that is covered by sand sheets and dunes is a challenging task, as the distribution of these sand deposits is not uniform across the desert. However, according to a study published in the journal Geomorphology in 2018, approximately 70% of the Sahara Desert is covered by sand sheets and dunes.The study used satellite imagery and field observations to map the extent and distribution of sand deposits in the Sahara Desert. The researchers found that sand sheets and dunes are most common in the central and eastern parts of the desert, where the wind is strongest and the landscape is most arid.
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What kind of celestial event occurred on earth this week after a coronal mass ejection on the sun in early march?.
The solar system consists of the Sun and everything that orbits around it, including eight planets, dwarf planets, moons, asteroids, and comets.
The eight planets, in order from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The four inner planets, including Mercury, Venus, Earth, and Mars, are called the terrestrial planets because they are relatively small, rocky, and close to the Sun. The four outer planets, including Jupiter, Saturn, Uranus, and Neptune, are known as the gas giants because they are much larger than the terrestrial planets and are primarily composed of gas and ice. The solar system formed about 4.6 billion years ago from a giant cloud of gas and dust.
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the force of earth's gravity on a capsule in space increases as it comes closer. when the capsule moves to half its distance, the force toward earth is then
If the capsule moves to twice its distance from Earth, the force of gravity acting on it will become weaker.
According to Newton's Law of Universal Gravitation, the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of their distance apart.
Therefore, as the distance between the capsule and Earth doubles, the force of gravity acting on the capsule will decrease by a factor of four. This means that the capsule will experience only one-fourth of the force of gravity that it experienced at its original position. This phenomenon is commonly observed in space missions and is taken into account when calculating trajectories and orbital velocities.
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Full Question;
The force of Earth's gravity on a capsule in space will lessen as it moves father away. If the capsule moves to twice its distance, the force toward Earth becomes
where do meanders form? question 4 options: a) at the mouth of a stream that enters a larger body of water b) on land in a valley at the mouth of a canyon c) in the lower gradient areas of a stream near the mouth d) on the steep slopes of headwater parts of streams
Meanders typically form in the lower gradient areas of a stream near the mouth. These are areas where the water flows more slowly and has a tendency to shift laterally, creating curves and bends in the channel.
Meanders can also form in other areas, but this is the most common location for them to develop.
Where do meanders form? Here are the four options:
a) at the mouth of a stream that enters a larger body of water
b) on land in a valley at the mouth of a canyon
c) in the lower gradient areas of a stream near the mouth
d) on the steep slopes of headwater parts of streams
Meanders form in the lower gradient areas of a stream near the mouth. This occurs because the water flow is slower in these areas, allowing for more sediment deposition and erosion, resulting in the formation of meanders.
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List 4 unique things about Parker's Ferry?
Answer:
yes
Explanation:
hope it helps
What writing system forms the basis for the writing throughout east asia?.
The writing system that forms the basis for writing throughout East Asia is the Chinese script. Developed over 3,000 years ago during the Shang Dynasty, it is a logographic system, meaning each character represents a word or a meaningful unit of language.
Chinese characters are comprised of strokes and radicals, which are basic components that convey meaning and pronunciation. This script has greatly influenced the writing systems in neighboring East Asian countries such as Japan, Korea, and Vietnam. In Japan, the adoption of Chinese characters led to the development of the Kanji script, which is used alongside the indigenous Hiragana and Katakana scripts. In Korea, the Chinese script was used before the invention of the Hangul script in the 15th century; even today, some Chinese characters are still utilized for specific purposes. In Vietnam, the Chinese script was used until the 20th century, when it was replaced by the Latin-based Quốc Ngữ script. The widespread use of the Chinese script across East Asia is due to its ability to transcend linguistic barriers, as the characters convey meaning rather than sound. This allowed for easier communication and the sharing of knowledge, culture, and ideas among these diverse regions.
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important factors that contribute to smog formation in the los angeles basin include which of the following? ample summer sunshine sea-level elevation high concentration of automobiles
The important factors that contribute to smog formation in the Los Angeles basin include ample summer sunshine, sea-level elevation, and high concentration of automobiles.
These factors increase the production of ground-level ozone and other pollutants, leading to poor air quality and health problems.
The important factors that contribute to smog formation in the Los Angeles Basin include ample summer sunshine, sea-level elevation, and a high concentration of automobiles.
Ample sunshine leads to increased photochemical reactions, sea-level elevation causes temperature inversions that trap pollutants, and the high concentration of automobiles produces emissions that contribute to smog formation.
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earthquake waves travel faster in the lithosphere than the asthenosphere. question 6 options: a) true b) false
The statement is true that earthquake waves travel faster in the lithosphere than the asthenosphere.
The lithosphere is the solid and rigid outermost layer of the Earth, while the asthenosphere is the weaker and more ductile layer beneath it. This difference in strength and rigidity affects the speed at which seismic waves propagate through the two layers. In the lithosphere, the waves encounter a more rigid and compact material, allowing them to travel faster. In contrast, the weaker and more ductile asthenosphere slows down the waves, resulting in a slower velocity.
Earthquake waves, specifically seismic waves, travel faster in the lithosphere than in the asthenosphere because the lithosphere is composed of more rigid, cooler, and denser materials, allowing waves to move more quickly. The asthenosphere is partially molten and has a higher viscosity, causing waves to travel at slower speeds.
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T/F: The most famous of the comets is the one carrying Edmund Halley's name, the man who calculated its orbit in 1682 and predicted its return to the inner solar system.
True. The most famous of the comets is Halley's Comet, named after Edmund Halley who calculated its orbit and predicted its return to the inner solar system.
Halley's Comet is a periodic comet, meaning that it returns to the inner solar system at regular intervals due to its orbit being influenced by the gravity of Jupiter and other planets. Its most recent appearance was in 1986, and it is expected to return again in 2061. Halley's Comet has been observed and recorded for thousands of years, with records dating back to ancient Babylonian and Chinese astronomers.
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Which of the following processes most logically explains the different tilts of gravestones in a hillside cemetery?Choose one:A. mudflowB. slumpC. liquefactionD. creep
Creep explains logically the different tilts of gravestones in a hillside cemetery.
D is the correct answer.
The repetitive expansion and contraction of the regolith, which may result from repeated wetting and drying or freezing and thawing, is what causes creep. Tilting trees, tilting fences, and shifted retaining walls are signs of creep.
Apart from direct gravitational influences, frost heaving is the most significant process causing creep. As interstitial water freezes, surface particles are propelled up and out perpendicular to the slope; when released by melting, these particles are drawn directly downward by gravity and are thereby gradually moved.
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Compared to a forested area, a de-forested region will have (more / less) runoff and (more / less) infiltration.
A de-forested region will have more runoff and less infiltration compared to a forested area. The presence of vegetation and organic matter in forests helps to intercept rainfall and promote infiltration, reducing the amount of runoff.
Without vegetation, rainfall hits the soil surface directly, causing more runoff and soil erosion. Additionally, deforestation can lead to soil compaction and reduced soil organic matter, further reducing infiltration capacity. In addition, without the trees to intercept and absorb precipitation, more water runs off the surface, leading to increased erosion and the potential for flash floods downstream. This can have negative impacts on both water quality and quantity in the affected area.
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According to this geologic timescale, which epoch immediately preceded the current one?.
According to the geologic timescale, the epoch that immediately preceded the current one is the Holocene epoch.
The Holocene epoch began approximately 11,700 years ago, following the end of the last glacial period, and is characterized by a relatively stable and warm climate that has allowed for the development of human civilization. Prior to the Holocene epoch was the Pleistocene epoch, which was marked by numerous glaciations and the evolution of many species, including humans.
The geologic timescale is a framework that divides Earth's history into distinct intervals based on significant events and changes in the planet's physical and biological systems.
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different processes influence the lateral migration of a meandering channel in its valley. erosion, transport, and deposition all play significant roles in shaping a river through time. focus on the locations in the channel where velocity is fast and slow, where along the channel erosion and deposition is occurring, and which direction the channel will migrate through time. drag the appropriate labels to their respective targets. not all labels will be used.
The lateral migration of a meandering channel in its valley is influenced by various processes, including erosion, transport, and deposition. These processes play significant roles in shaping a river over time.
Velocity is a key factor in the lateral migration of a meandering channel. In areas where velocity is fast, erosion is likely to occur as the water is more capable of carrying sediment and debris. This erosion can cause the channel to migrate laterally towards the opposite bank. In areas where velocity is slow, deposition is more likely to occur.
This means that sediment and debris will settle on the river bed, which can cause the channel to migrate laterally towards the inside of the meander bend.
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part a the amount of gravitational potential energy released as an object falls depends on the amount of gravitational potential energy released as an object falls depends on only its mass and the acceleration of gravity. only the acceleration of gravity. its mass and its speed at the time it begins falling. its mass, the distance it falls, and the acceleration of gravity. its mass and its speed when it hits the ground.
The amount of gravitational potential energy released as an object falls depends on its mass, the distance it falls, and the acceleration of gravity.
Gravitational potential energy is the energy an object possesses due to its position relative to the ground. As an object falls, it loses potential energy and gains kinetic energy due to its motion. The potential energy that is converted into kinetic energy is dependent on the mass of the object and the acceleration of gravity. Additionally, the distance the object falls also plays a role in the amount of potential energy that is released. Therefore, the correct option is "its mass, the distance it falls, and the acceleration of gravity."
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which land cover has the most stormwater discharge (runoff) after a storm given the image? question 13 options: urban agricultural agricultural-forest forest
urban land cover is likely to have the most stormwater discharge (runoff) after a storm. Option A.
Urban areas typically have a high percentage of impervious surfaces such as roads, parking lots, and buildings, which prevent water from infiltrating into the ground. This means that when it rains, a large amount of water runs off these surfaces and into storm drains, ultimately discharging into nearby waterways. In contrast, agricultural and forested areas have more vegetation and permeable soil, allowing for greater infiltration and less runoff. However, the specific amount of stormwater discharge depends on factors such as the intensity and duration of the storm, topography, and soil characteristics.
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Full Question ;
which land cover has the most stormwater discharge (runoff) after a storm given the image? question 13 options:
urban
agricultural
agricultural-forest
forest
Question 3 of 18
Match the term in column 1 to the definition in column 2.
The Eightfold
Path
Brahmin
Dharma
Karma
?
?
?
?
The measure and effect of
a Hindu's deeds
The duties of a Hindu
How a Buddhist achieves
enlightenment
A social class in Hinduism
Answer:
1. The Eightfold Path: How a Buddhist achieves enlightenment
2. Brahmin: A social class in Hinduism
3. Dharma: The duties of a Hindu
4. Karma: The measure and effect of a Hindu's deeds
list the three general regions of the sun's atmosphere in the order of increasing temperature
Answer:
Explanation:
The three general regions of the Sun's atmosphere in order of increasing temperature are:
The photosphere: This is the visible surface of the Sun that emits visible light. It has a temperature of around 5,500 degrees Celsius.
The chromosphere: This is the region of the Sun's atmosphere just above the photosphere. It has a reddish colour and is visible during total solar eclipses. The temperature of the chromosphere increases with height, ranging from about 4,000 to 50,000 degrees Celsius.
The corona: This is the outermost and hottest region of the Sun's atmosphere, extending millions of kilometres into space. The temperature of the corona is extremely high, ranging from about 1 to 3 million degrees Celsius. The corona is visible during total solar eclipses as a bright halo around the Sun.
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Please help guys !!!!!!! geoscience
For the given image, correct answers are:
Metamorphic rocksFoliatedNon-foliatedGneissquartziteMarbleShaleGraniteSandstoneFalseTrueFalseTrueMetamorphic Rocks:Metamorphic rocks are a type of rocks that are formed by the transformation of pre-existing rocks under high temperatures, pressures, and chemical reactions without melting. These rocks are altered in their mineral composition, texture, and structure, resulting in a different appearance and physical properties from the original rock.
Metamorphic rocks can form from different parent rocks, including not only igneous rocks, but also sedimentary rocks and other metamorphic rocks. The specific type of metamorphic rock that forms depends on the characteristics of the parent rock and the conditions it undergoes during metamorphism.
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frictional drag beneath a tsunami wave occurs when what else happens? question 5 options: a) when the sediment type on the sea floor changes b) when the depth to the sea floor is equal to tsunami wave base c) when height of the tsunami wave is doubled d) when the wave period equals 10 minutes
Frictional drag beneath a tsunami wave occurs when the depth to the sea floor is equal to tsunami wave base.
The is a sequence of exceptionally long waves created by a significant and abrupt displacement of the water, which is generally the result of an earthquake beneath or near the ocean floor. Waves produced by this friction travel in all directions away from their source, occasionally spanning whole ocean basins. Tsunamis go through the whole water column, from the ocean floor to the surface, in contrast to wind-driven waves, which only pass through the highest layer of the ocean.
Tsunamis, due to their speed and volume, may be highly damaging. They are hazardous because they bring people and trash back to the sea with them. It's possible that a tsunami's initial wave won't be its final, biggest, or most destructive one.
Option B is the correct answer.
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What canadian city is known as the city of gardens.
I think it is Greater Victoria
What did the Nature Conservancy do between 1973-1994 for the Chowan swamp?
According to the CRB article, between 1973 and 1994, the Nature Conservancy acquired more than 50,000 acres of land in the Chowan swamp and established it as a preserve.
To safeguard and manage the land, they collaborated with businesses, the government, and private landowners. This included managing the forest and wetland habitats through controlled burns.
As a result of logging and fire suppression, longleaf pine savannas had been decimated; they also sought to recover them.
To better understand the ecology and guide management choices, The Nature Conservancy also performed study and monitoring of the plant and animal species in the swamp.
The Chowan swamp and its distinctive natural features were conserved and preserved in large part because to the organisation.
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what are the problematic consequences of building structures along shorelines to minimize the impact of coastal processes
Building structures along shorelines can cause disruption to natural coastal processes, leading to long-term environmental damage and a decline in coastal biodiversity.
The possibility for increased erosion of the coastline is the most serious effect of building structures along shorelines to lessen the impact of coastal processes. This is so that the structures won't interfere with normal coastal processes like erosion, movement of sediment, and wave action. The interruption of these processes may result in the development of man-made dunes and coves along the shoreline, reducing the diversity of coastal habitats.
Additionally, by obstructing access to the water and altering the natural flow of water and sediment, structures built along the shoreline can have a negative effect on nearby habitats, such as wetlands. Additionally, this may make it harder for animals to find food and shelter. Furthermore, the availability of such structures may limit opportunities for leisure activities like swimming or fishing. Finally, the cost of building and maintaining these facilities might strain taxpayers.
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How would a stage 4 and stage 5 population pyramid differ?
The stage 4 and stage 5 population pyramid will differ by:
stage 4 will have evenly distributed age structure with a smaller base and a larger middle-aged and older population,the stage 5 will have smaller base and an even larger proportion of older population compared to stage.How does population pyramids means?The population pyramid represents breakdown of the population by gender and age at a given point in time which consists of two histograms, one for each gender where the numbers are shown horizontally and the ages vertically.
We have low fluctuation in the fourth stage of a population pyramid. With a continued increase in life expectancy, the birth rates remain above the death rates. The fifth stage of a population pyramid is the natural decrease.
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What physical feature is just north of the himalayan mountain range?.
The physical feature just north of the Himalayan mountain range is the Tibetan Plateau.
The Himalayan mountain range and the Tibetan Plateau are geographically linked. The Himalayas were formed as a result of the collision between the Indian and Eurasian tectonic plates, which also caused the uplift of the Tibetan Plateau.
The Tibetan Plateau is located in Central Asia, to the north of the Himalayas. It is the world's highest and largest plateau, often referred to as the "Roof of the World." It has an average elevation of around 4,500 meters (14,764 feet) above sea level and spans approximately 2.5 million square kilometers (965,000 square miles).
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In what year was the fish advisory for dioxin levels lifted for the Chowan River?
The fish advisory for dioxin levels in the Chowan River was lifted in 2001.
In the 1980s, high levels of dioxin pollution were discovered in the Chowan River and its tributaries due to the discharge of chemicals from a pulp and paper mill. As a result, a fish advisory was put in place, warning people not to eat fish caught in the river. The advisory was in effect for over 15 years, but extensive cleanup efforts and changes in industrial practices led to a decrease in dioxin levels. In 2001, the advisory was lifted for the Chowan River, allowing people to once again fish and consume fish caught in the river. While dioxin levels have decreased significantly, periodic testing is still conducted to ensure the safety of fish in the river.
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What two species of herring are found in the Chowan River?
The two species of herring are found in the Chowan River are Atlantic herring and American shad.
The Atlantic herring (Clupea harengus) and American shad (Alosa sapidissima) are two of the many herring species that can be found in North Carolina waterways.
Both of these species are anadromous, which means they reside in the ocean for the majority of their lives before moving into freshwater rivers to spawn.
American shad, which once supported a sizable commercial fishery in the region, have a substantial spawning habitat in the Chowan River.
Herring may have been taken accidentally while shad fishing or intentionally in the past, as they are a significant feeder fish for many other species.
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The observation that different geographical areas sometimes exhibit plant and animal communities of similar appearance, even though the individual plants and animals are not closely related, is called:.
The observation that different geographical areas exhibit plant and animal communities of similar appearance, even though the individual plants and animals are not closely related, is called "convergent evolution."
The observation you are referring to is called convergent evolution. In long answer, convergent evolution is a phenomenon in which unrelated species evolve similar adaptations to similar environmental pressures.
This can result in similar looking plant and animal communities in different geographical areas, even though the individual species are not closely related. An example of this is the wings of bats, birds, and insects, which have all evolved to serve the same function of flight, but have different structures and are made of different materials due to their different evolutionary histories.
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what proportion of global greenhouse gas emissions is influenced by carbon markets? why? climate change
Carbon markets, which allow for the trading of carbon credits or emissions allowances, have been established to help mitigate greenhouse gas emissions.
However, the proportion of global emissions influenced by these markets is relatively small. According to the World Bank, only about 2% of global greenhouse gas emissions are covered by carbon pricing initiatives, which include both carbon taxes and emissions trading systems.
This is largely due to the fact that many countries have not yet implemented these mechanisms and industries in certain sectors, such as agriculture and transportation, are exempt from carbon pricing. Despite this, carbon markets are still seen as an important tool in addressing climate change and reducing emissions in the long term.
Approximately 20% of global greenhouse gas emissions are influenced by carbon markets. Carbon markets are systems where countries and companies can trade emission allowances to help reduce their overall emissions. The purpose of these markets is to encourage the reduction of greenhouse gas emissions by providing financial incentives for companies to invest in cleaner technologies and practices. Carbon markets exist both at national and international levels and help in combating climate change by putting a price on emissions, making polluters pay for their impact on the environment.
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What about earthquakes with magnitude greater than 4.0 is most accurate?
Earthquakes with magnitude greater than 4.0 can cause noticeable shaking and damage to buildings, depending on the location and depth of the earthquake. The higher the magnitude, the stronger the shaking and the more widespread the damage can be.
However, it's important to note that earthquakes of this size occur frequently around the world and are not necessarily a cause for major concern unless they occur in a densely populated or vulnerable area. It's also important to be prepared for earthquakes by having an emergency kit, identifying safe places to take cover during an earthquake, and knowing what to do in the event of an earthquake.
In general, the most accurate information about earthquakes and their potential impacts can be found through reputable sources such as the United States Geological Survey or local emergency management agencies.
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. climate is described by the mean and annual variation in what two factors? how and why do these factors vary geographically? be able describe how variation in climate is related to the types of plant life found in an area (e.g., trees vs grasses vs dessert) 3. which of the following patterns of annual precipitation are caused by hadley cell circulation a. low precipitation on the leeward side of a mountain range b. high rainfall at 30n and 30s, with lower precipitation near the equator c. high rainfall at the equator d. low precipitation at the poles e. high amounts of rainfall during the summer in california
The answer is B. The climate is described by the mean and annual variation in temperature and precipitation.
These factors vary geographically due to a variety of factors such as latitude, altitude, ocean currents, and wind patterns. Variation in climate is related to the types of plant life found in an area because different plants have adapted to specific climate conditions. For example, trees are typically found in areas with higher amounts of precipitation and cooler temperatures, while grasses are found in drier, warmer areas. The pattern of high rainfall at 30N and 30S, with lower precipitation near the equator, is caused by Hadley cell circulation.
The climate is described by the mean and annual variation in temperature and precipitation. These factors vary geographically due to differences in latitude, altitude, proximity to large bodies of water, and ocean currents. For example, areas near the equator experience higher temperatures and precipitation due to direct sunlight and Hadley cell circulation, which causes high rainfall at the equator (option c). In contrast, regions at 30°N and 30°S have lower precipitation due to descending air in the Hadley cell circulation (option b).
Variation in climate is related to the types of plant life found in an area. In areas with high precipitation and warm temperatures, you might find tropical rainforests with diverse plant species. In regions with moderate precipitation, you can find grasslands and forests. Deserts typically form in areas with low precipitation, such as on the leeward side of a mountain range (option a).
Low precipitation at the poles (option d) is caused by polar cell circulation, while high amounts of rainfall during the summer in California (option e) are influenced by regional weather patterns, not Hadley cell circulation.
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What unesco world heritage site is off the eastern coast of australia?.
The UNESCO world heritage site that is off the eastern coast of Australia is the Great Barrier Reef.
UNESCO World heritage Sites:
A UNESCO World Heritage Site is a place or landmark having significant cultural, historical, scientific, or natural value to humanity. These sites are protected and managed by the international community, with the aim of preserving it for future generations.
Great Barrier Reef:Australia's Great Barrier Reef is the world's largest coral reef system and is located in the Coral Sea, off the coast of Queensland in northeastern Australia. The Great Barrier Reef was inscribed as a World Heritage Site in 1981 due to its exceptional natural beauty, significant bio-diversity, and importance as a habitat for numerous rare and endangered species.
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