| A | B |
| astronomy | the study of objects beyond earths atmosphere |
| meteorology | study of the forces and processes that cause the atmosphere to change and produce weather |
| geology | the study of the materials that make up Earth, the process that form and change these materials, as well as the history of the planet and its life-forms |
| oceanography | study of earths oceans |
| environmental science | the study of the interactions of organisms and their surroundings |
| geosphere | the area from the surface of Earth down to its center |
| atmosphere | the blanket of gases that surrounds our planet |
| hydrosphere | all water on earth including the water in the atmosphere |
| cryosphere | the region of permanently frozen water on Earth |
| biosphere | all organisms on Earth as well as the environment in which they live. |