About Earth

Physical ConstantValue
Surface Gravity9.806 m/s^2
Escape Velocity11.19 km/s
Temperature Range-88° C to 58° C (-126° F to 136° F)
ElementAmount (%)
Oxygen46.6%
Silicon27.7%
Aluminum8.1%
Iron5.0%
Calcium3.6%
Sodium2.8%
Potassium2.6%
Magnesium2.1%
All Others1.5%
GasAmount (%)Amount (PPM)
Nitrogen78%780000
Oxygen21%210000
Water Vapor (0.001-5%)5%50000
Argon0.9%9000
Carbon Dioxide0.04%400
Neon0.002%20
Helium0.0005%5
Methane0.0002%2