| Term | Definition |
| weather balloon | a balloon released into the atmosphere that carries a package of instruments to record data about temperature, air pressure, and humidity |
| station model | an arrangement of symbols and numbers that show the weather conditions recorded at a weather station |
| forecast | a prediction of what the weather will be like in the future |
| weather map | a map that shows data about recent weather conditions across a large area |
| surface map | a map that includes station model symbols and information about fronts and about centers of high pressure and low pressure |
| greenhouse effect | the process by which the Earth's atmosphere absorbs heat from the sun |
| El Nino | a short-term climate change that occurs every two to ten years |
| global warming | a rise in Earth's average temperature due to an increase in carbon dioxide |
| climate | the average of all weather conditions through all seasons over a period of time |
| microclimate | the climate of a very small area |