Arcata is also the location of the Arcata Field Office of the Federal Bureau of Land Management, which is responsible for the administration of natural resources, lands and mineral programs, including the Headwaters Forest, on approximately 200,000 acres of public land in Northwestern California.
Compton's, 1995. They divide the mass of the Earth by the volume, which gives the average density of the material in the earth as 3.2 ounces per cubic inch (5.5 g/cm 3).. 5.5 g/cm 3. Orbits Voyage Through The Solar System. Phoenix, AZ: Software Marketing, 1989. Mean Density: (water = 1) 5.52.. 5.52 g/cm 3. Morse, Joseph Laffan.
How Large is the Earth Compared to the Universe? or, Using the Earth to build a Road to Pluto. Let's start with how big the Earth is. Well, the average diameter of the Earth is 7926 miles, which gives it a radius of 3963 miles and a volume of 261 billion cubic miles of Earth earth (see arithmetic in the last paragraph).