Facts about Earth
- 11
Rainwater takes approximately 9 days to travel from Earth's surface through the water cycle back to the atmosphere through evaporation and transpiration.
- 10
Venus rotates so slowly that one Venusian day lasts 243 Earth days, making it longer than Venus's 225-day orbit around the sun.
- 09
A year on Earth lasts 365.25 days because our planet completes one orbit around the sun in that exact time period, requiring the leap day adjustment every four years.
- 08
Earthquakes release approximately 500,000 times more energy than the atomic bombs dropped on Hiroshima and Nagasaki combined, with the 2004 Indian Ocean earthquake registering 9.1 magnitude.
- 07
Magnetic reversal of Earth's poles occurs irregularly, with the most recent reversal happening approximately 780,000 years ago during the Brunhes-Matuyama transition.
- 06
Every day, approximately 100 tons of cosmic dust and sand-sized particles settle onto Earth's surface from space.
- 05
Oxygen production by ocean phytoplankton generates approximately 50 to 80 percent of Earth's atmospheric oxygen despite covering less than 1 percent of the planet's surface.
- 04
At 6,371 kilometers, Earth's mean radius makes it the fifth largest planet in our solar system by diameter.
- 03
Approximately 71 percent of Earth's surface is covered by water, containing 97.5 percent salt water and only 2.5 percent fresh water.
- 02
In 1912, Alfred Wegener proposed continental drift theory, explaining how Earth's landmasses have moved across the planet over 200 million years.
- 01
The Mariana Trench's deepest point, Challenger Deep, reaches approximately 10,994 meters below sea level.