With respect to matter, Earth is a closed system and with respect to energy, Earth is an open system.
Open ~Apex
DOpen
geothermal
Energy is actually kind of complicated to define, but in general terms, it's the ability to do Work.
solar energy
The energy from the Sun, solar energy drives all the process important to life on Earth.
DOpen
Quasars
Earth is a planet, not a solar system.
Radiation!
mass
It is geothermal energy, coal energy, and natural gas and oil energy.
geothermal
Energy is actually kind of complicated to define, but in general terms, it's the ability to do Work.
solar energy
geothermal
geothermal
The kind that's bad for our Earth. :(