- Densest of the eight planets at 5.515 g/cm³
- Earth is the only place in the universe where life is known to exist
- About 71% of the surface is covered with salt water oceans
- The planet's interior remains active, with a thick layer of relatively solid mantle, a liquid outer core that generates a magnetic field, and a solid iron inner core
- Its poles are mostly covered with solid ice
- Orbits the sun approximately every 365.25 days
- The mechanically rigid outer layer of the Earth, the lithosphere, is broken into pieces called tectonic plates that move in relation to one another