Which tools are commonly used to collect weather data in Earth science?

• A. Thermometers and rain gauges
• B. Infrared technology to predict volcanic eruptions
• C. Undersea satellites
• D. Space probes

Answer: (A)

Weather data come from measuring the atmosphere’s conditions. The most fundamental measurements are how hot or cold the air is and how much precipitation falls. A thermometer provides the air temperature, and a rain gauge records how much rain has fallen over a set period. These two simple tools give direct, reliable observations that weather stations use to track daily conditions, notice changes over time, and help with forecasts. Other options describe technologies used for different purposes—infrared sensing for heat detection can be part of remote sensing, but not as the basic, everyday weather measurements; space-based instruments (satellites or probes) monitor weather from above, which complements ground data but isn’t the primary, readily available pair for collecting common weather data on Earth.