Write the preface on the topic earth as a planet, latitude and longitude, global warming
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Earth as a planet-
Earth, otherwise known as the World or the Globe, is the third planet from the Sun and the only object in the Universe known to harbor life. It is the densest planet in the Solar System and the largest of the four terrestrial planets.
Radius: 6,371 km
Axial tilt: 23.4392811°
Polar radius: 6356.8 km (3949.9 mi)
Volume: 1.08321×10^12km^3 (2.59876×10^11 cu mi)
Equatorial rotation velocity: 0.4651 km/s; (1674.4 km/h; 1040.4 mph)
Mean anomaly: 358.617°
Latitude and Longitude-
Latitude and longitude are imaginary (unreal) lines drawn on maps to easily locate places on the Earth. Latitude is distance north or south of the equator (an imaginary circle around the Earth halfway between the North Pole and the South Pole) and longitude is distance east or west of the prime meridian (an imaginary line running from north to south through Greenwich, England). Both are measured in terms of the 360 degrees (symbolized by °) of a circle.
The Equator is the line of 0° latitude, the starting point for measuring latitude. The latitude of the North Pole is 90° N, and that of the South Pole is 90° S. The latitude of every point in between must be some degree north or south, from 0° to 90°. One degree of latitude covers about 69 miles (111 kilometers).
Longitude is measured in degrees east or west of the prime meridian. This means one half of the world is measured in degrees of east longitude up to 180°, and the other half in degrees of west longitude up to 180°. See the diagrams below to understand latitudes and longitudes better.
Global Warming-
Over the past 50 years, the average global temperature has increased at the fastest rate in recorded history.
Global warming occurs when carbon dioxide (CO2) and other air pollutants and greenhouse gasses collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth’s surface. Normally, this radiation would escape into space but these pollutants, which can last for years to centuries in the atmosphere, trap the heat and cause the planet to get hotter. That's what's known as the greenhouse effect.
Earth, otherwise known as the World or the Globe, is the third planet from the Sun and the only object in the Universe known to harbor life. It is the densest planet in the Solar System and the largest of the four terrestrial planets.
Radius: 6,371 km
Axial tilt: 23.4392811°
Polar radius: 6356.8 km (3949.9 mi)
Volume: 1.08321×10^12km^3 (2.59876×10^11 cu mi)
Equatorial rotation velocity: 0.4651 km/s; (1674.4 km/h; 1040.4 mph)
Mean anomaly: 358.617°
Latitude and Longitude-
Latitude and longitude are imaginary (unreal) lines drawn on maps to easily locate places on the Earth. Latitude is distance north or south of the equator (an imaginary circle around the Earth halfway between the North Pole and the South Pole) and longitude is distance east or west of the prime meridian (an imaginary line running from north to south through Greenwich, England). Both are measured in terms of the 360 degrees (symbolized by °) of a circle.
The Equator is the line of 0° latitude, the starting point for measuring latitude. The latitude of the North Pole is 90° N, and that of the South Pole is 90° S. The latitude of every point in between must be some degree north or south, from 0° to 90°. One degree of latitude covers about 69 miles (111 kilometers).
Longitude is measured in degrees east or west of the prime meridian. This means one half of the world is measured in degrees of east longitude up to 180°, and the other half in degrees of west longitude up to 180°. See the diagrams below to understand latitudes and longitudes better.
Global Warming-
Over the past 50 years, the average global temperature has increased at the fastest rate in recorded history.
Global warming occurs when carbon dioxide (CO2) and other air pollutants and greenhouse gasses collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth’s surface. Normally, this radiation would escape into space but these pollutants, which can last for years to centuries in the atmosphere, trap the heat and cause the planet to get hotter. That's what's known as the greenhouse effect.
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