According to the U.S. Geological Survey, about 71 percent of the Earth is covered in water. The total volume of all the water is equal to around 332.5 million cubic miles.Know More
All of Earth's water, including water from oceans, icecaps, glaciers, lakes, rivers, groundwater and water in the atmosphere, could be put into a sphere with a diameter of about 860 miles. This is about the same distance between Atlanta, Ga. and New York City.
If only the Earth's fresh water were put together in a similar sphere, it would have a volume of 2.55 million cubic miles and be 169.5 miles in diameter.Learn more about Earth Science
Bodies of water on Earth are maintained by the atmosphere keeping the water cycle of evaporation, condensation and precipitation functioning so that water can be replenished. Also, the gravitational pull of the Earth keeps water from leaving the planet.Full Answer >
Astronomers theorize that over 4.5 billion years ago, Theia, an object about the size of Mars, collided with Earth to create a tilted axis. This is called "the giant impact theory." Prior to this event, the axis was straight at 180 degrees.Full Answer >
While no one knows for certain how the Earth formed, scientists theorize that it formed over 4 million years ago after the sun went through its initial formation, gravity began to draw heavy particles together into a planet and solar winds blew away lighter gases. These heavy particles became the core of the planet. As the mass continued to grow, heavier particles sank to the center, according to Space.com.Full Answer >
According to Universe Today, the duration of a day on Earth is the time it takes for the planet to complete a rotation around its axis. The Earth’s rotation takes 23 hours, 56 minutes and 4.1 seconds.Full Answer >