The mixture of gases that surround a planet.
Atmosphere
All the living things on Earth.
Biosphere
The place at which land masses meet the ocean.
Coastline
The process by which a gas changes into a liquid.
Condensation
The process by which a liquid changes into a gas.
Evaporation
The solid portion of Earth.
Geosphere
All of Earth’s water, taken together in all states of matter.
Hydrosphere
Water that falls from the air to Earth’s surface.
Precipitation
A set of connected things forming a complex whole.
system
The process in which water continuously moves from Earth’s surface into the atmosphere and back again.
Water cycle
