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The age of the Earth is about 4.54 billion years from radiometric age dating of material in meteorites.
Water covers an estimated 71% of Earth's surface; oceans contain some 96.5% of all Earth's water.
About 78% of the composition of the atmosphere is nitrogen; 21% is oxygen and trace amounts other gases, for example, carbon dioxide and argon.
The Earth core is made largely of iron and nickel and it is as warm as the solar surface, for it can achieve temperatures of approximately 5,500°C or 9,932°F.
Gravity is also not uniform for all places of the Earth; it varies mainly due to slight differences in densities of the different parts of Earth's crust where gravity is comparatively stronger or lesser.
The Earth's crust consists of large sections known as tectonic plates. Movement of these plates creates earthquakes, volcanic activity, and the creation of mountain ranges.
The highest point is Mount Everest, which rises 8,848 meters (29,029 feet) above sea level. The lowest point is the Challenger Deep in the Mariana Trench with an approximate depth of about 11,034 meters (36,201 feet) below sea level.
The Great Barrier Reef in Australia is the largest coral reef system in the world, stretching over 2,300 kilometers (1,430 miles).
The Amazon Rainforest is the largest tropical rainforest on Earth and is often referred to as the "lungs of the planet" because it produces about 20% of the world's oxygen.
The Earth has only one natural satellite, the Moon, which impacts the tides of the planet due to its gravitational pull.
The Sahara Desert is the largest hot desert in the world, occupying about 9.2 million square kilometers or 3.6 million square miles.
The Earth spins around its axis in 24 hours, thereby providing us with the phenomenon of day and night. However, through gradual retardation, it takes about 1.7 milliseconds more than the previous one for a century to complete.
The Amazon Basin and the Congo Basin are areas where there exist hotspots with a very large number of species. Most species in these places are endemic species.
Solar and wind energy can be used to meet the world's energy needs. The sun gives the Earth as much energy in one hour as it uses in a year.
Glaciers cover about 10% of the Earth's land area and contain about 68% of the Earth's fresh water.