Earth: Ten Fascinating Facts [IGEO TV]

• Report rights infringement
• published: 30 Sep 2013
• views: 2449

1. Earth is not a perfect sphere. It's actually an oblate spheroid, thanks to a slight equatorial bulge (the difference between the equatorial and polar diameters). This means that it is spherical, but also flattened from its two opposite poles. The rotating motion of the earth results in centrifugal force, which in turn causes the planet to retain its disk-shaped figure. 2. Water, which covers almost 70 percent of the Earth's surface, can be found across three states of matter namely solid, water, and air. Also, it covers three quarters on Earth's surface in the shape of fresh water reservoirs and supplies, rivers, seas and oceans. These one contains 97% of water on Earth. 3. The border between Earth and space is 100 km altitude. 75% of atmospheric mass is in the first 11 km of height from the sea surface. 4. Earth is an iron planet. It's the thickest and the fifth biggest planet in Solar System. More common chemical elements are iron (about 32%), oxygen (about 30%) and silicon (about 15%). Scientifics believe that the Earth's core is mainly compound by iron (about 88%). 5. Earth is the only habitable place in the Universe. Earth is the only astronomic body where there are possibilities of life. Nowadays, there are 1.2 millions of catalogued animal species, although scientifics believe that it's a small percentage of totals. Earth formed around 4.500 millions of years ago, and life has been during the large part of this period. Earth physical properties, geologic history and its orbit have allowed life on Earth during millions of years. 6. Gravity changes across the surface of the Earth — so dieters might want to avoid the poles, where you weigh 0.5 percent more than at the equator. This gravity disparity is largely due to at equatorial bulge creating non-uniform distances from points on the planet's surface to center of the Earth, and to the fact that the Earth spins. Moreover, terrestrial land is irregular, and our mass planet is not distributed in a homogeneous way. This means that due to the gravitational pull, you are technically lighter or heavier in certain locations in the globe, though you'll never feel it. 7. Earth is a planet of opposite sites, and is full of contrasts. The variety of its geographic areas and climates allow every region has special features. The hottest place of Earth is the Death Valley of USA, where on July 10, 1913 temperature rises until 56,7 °C. On the other hand is the Antarctic, where on July, 31 1983, measure tools reached −89.2 °C. 8. The biggest alive structure of Earth is the Great Barrier Reef, located in front of Australia cost. Formed by thousands of living organism, it's the only one that we can see from the space, and occupy more than 2.000 km. In 1981 was declared World Heritage by UNESCO. 9. The Earth's tectonic plates, which collide with each other and are responsible for everything from earthquakes to mountains being formed, also play a vital role in maintaining the planet's carbon balance and thus, allowing life to thrive. 10. Earth has a protector shield. Earth magnetic field, from the Earth's core to the solar wind limit, acts like a shield against the continuous bombing of solar particles. Among other things, magnetic field helps too to some animal orientation, like us, using compasses. http://igeo.tv/ Watch Video Planet X / Nibiru, Effects on Earth: http://www.youtube.com/watch?v=h-nwgtcqIHw Igeo TV en español: ver videos, agencia de noticias y venta de metraje en: http://www.youtube.com/user/igeotv