| A | B |
| Barometer | An instrument for measuring atmospheric pressure. |
| Evaporation | When a liquid turns to a gas. |
| Particle | A tiny piece of something. |
| Thermometer | An instrument for measuring temperature |
| Atmosphere | The layers of gas that surround the Earth |
| Condensation | When a gas turns back into a liquid. |
| Hygrometer | An instrument for measuring humidity |
| Temperate | A biome that stays the same temperature all year. |
| Anemometer | An instrument for measuring wind speed. |
| Biome | A type of ecosystem |
| Front | The place where different types of air (hot/cold or wet/dry) meet. |
| Precipitation | When condensation gets heavy and droplets of liquid fall. |