| A | B |
| The climate of a very small area | microclimate |
| The climate of a very small area | global warming |
| New moon, quarter moon, full moon, quarter moon | lunar cycle |
| The change of water from one state to another as it moves between Earth's surface and the atmosphere | water cycle |
| The change of water from one state to another as it moves between Earth's surface and the atmosphere | deposition |
| The movement of weathered material by water, wind, or ice | erosion |
| The spinning of a planet, moon, or star on its axis | rotation |
| A short-term climate change that occurs every two to ten years caused by a rise in the temperature of surface water in the Pacific ocean | El Nino |
| A natural force that helps build up parts of the Earth | constructive force |
| A natural force that tears apart parts of the Earth | destructive force |
| The average temperature and rainfall of an area over many years | climate |
| The rise in temperature that the Earth experiences because certain gases in the atmosphere are trapped | greenhouse effect |
| Resources that nature can not replace quickly enough to meet people's needs | nonrenewable resources |
| Resources that are never used up as they are being used | inexhaustible resources |
| Fuels formed in the ground from the remains of dead plants and animals | fossil fuels |
| Resources that nature can produce again and again in a relatively short period of time | renewable resources |