| Answer | Crossword Clue |
|---|---|
| TRACEELEMENT | Xenon, for example, in the atmosphere |
| humidifiers | A device for keeping the atmosphere moist in a room |
| humidifier | A device for keeping the atmosphere moist in a room |
| sonde | rocket, balloon, or rockoon used as a probe for observing phenomena in the atmosphere |
| sondes | rocket, balloon, or rockoon used as a probe for observing phenomena in the atmosphere |
| barometry | an instrument for determining the pressure of the atmosphere and hence for assisting in forecasting weather and for determining altitude |
