Earth
“The blue planet”
- Distance from the Sun: 149.6 million km (93 million miles)
- Diameter: 12,742 km (7,918 miles)
- Mass: 5.97 × 10²⁴ kg
- Gravity: 9.8 m/s²
- Orbital period: 365.25 days (1 year)
- Rotation period: 24 hours (1 day)
Atmosphere
- Composition: 78% Nitrogen, 21% Oxygen, 1% other gases
- Function: Protects life, blocks harmful solar radiation
- Weather: Supports oceans, clouds, storms, and climate
Surface Features
- Oceans: 71% of the surface
- Continents: 29% of the surface
- Highest point: Mount Everest (8,849 m / 29,032 ft)
- Deepest point: Mariana Trench (-10,924 m / -35,840 ft)
Life on Earth
- Only planet known to support life
- Biodiversity: Millions of species of plants, animals, and microorganisms
- Habitats: Oceans, forests, deserts, polar regions