For Sale- Planet Earth
$100,000,000,000,000,000,000,000.00
This planet is available for purchase right as you read this advertisement.
It is just the right distance away from our Sun to allow just the right amount of air, water and heat to support life. Earth's crust is made up of several elements: iron, 32 percent; oxygen, 30 percent; silicon, 15 percent; magnesium, 14 percent; sulfur, 3 percent; nickel, 2 percent; and trace amounts of calcium, aluminum and other elements. The crust is divided into huge plates that float on the mantle, the next layer.
For sale now only $100,000,000,000,000,000,000,000.00
Earth's Interior
The earth is divided into four main layers: the inner core, outer core, mantle, and crust. The core is composed mostly of iron and is so hot that the outer core is molten, with about 10% sulphur. The inner core is under such extreme pressure that it remains solid.
Tectonic Plate Boundaries
Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like a hard and rigid shell compared to Earth's mantle. This strong outer layer is called the lithosphere.
Earth's Magnetic Field
Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from the Earth's interior to where it meets the solar wind, a stream of charged particles emanating from the Sun.
Earth's Atmosphere
The atmosphere is a mixture of nitrogen (78%), oxygen (21%), and other gases (1%) that surrounds Earth. Earth's atmosphere is divided into five main layers, the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere. The atmosphere thins out in each higher layer until the gases dissipate in space.