wildaspie

1. Earth is also known as Terra, the World, and Gaia; also, the surface particulates of the planet are known collectively as earth (dirt).
2. Our plant’s circumference is roughly 24,901 miles (40,075 km).
3. Earth is the largest of the inner planets (largest to smallest: Earth, Venus, Mars and Mercury).
4. The planet is approximately 4.54 billion years old.
5. Life has probably existed on Earth’s surface for some 3.5 billion years.
6. The planet rotates on an axis tilted 23.4 degrees past the perpendicular to orbital plane.
7. Approximately every 366.26 rotations, Earth completes an orbit of the Sun.
8. Earth is made up of layers: a crust of tectonic plates and bodies of water; a mantle of viscous minerals; a liquid outer core, and a solid inner core of iron.
9. Our planet’s crust is made up mostly of silica, followed by aluminum, lime, magnesia, sodium, and iron.
10. 71% of Earth’s surface is covered by salt water.
11. The planet produces a magnetic field; at irregular intervals the polarity of the fields reverse.
12. Earth has one satellite, the Moon, which creates tides on the planet due to gravitational attraction.
13. Our planet is home to millions of species, and humans alone count near 7 billion lives.

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