| A | B |
|---|
| atmosphere | layer of gasses surrounding the Earth |
| biosphere | all living organisms in the Earth system and their environments |
| carbon cycle | the biogeochemical circulation carbon through the Earth system |
| closed system | a system in which energy can enter or leave, but not matter |
| cycle | physical or chemical processing of Earth material over time |
| earth system science | atmosphere, geosphere, hydrosphere, biosphere |
| energy cycle | movement of energy into and out of the earth |
| evapotranspiration | cycling of water vapor into the atmosphere by evaporation or transpiration |
| geosphere | physical/mineral features of the earth |
| geothermal energy | heat energy from the earth and moves tectonic plates |
| hydrosphere | all the water in the earth system |
| model | a simplified representation of an object process or phenomenon |
| open system | a system in which there is free exchange in energy and matter |
| solar energy | energy emitted by the sun |
| system | naturally occurring group of objects |
| tidal energy | energy created by gravitational pull of the sun and moon on Earth's oceans |
| water cycle | a circulation of water through the hydrosphere as solid liquid or gas |
