That's not quite right! Rain doesn't occur simply because water drops fall through the air. Rain happens due to a complex process involving condensation, cloud formation, and precipitation. Here's a simplified explanation:

1. Evaporation: Water on the Earth's surface (oceans, lakes, rivers, etc.) evaporates, turning into water vapor and rising into the atmosphere.

2. Condensation: As the warm, moist air rises, it cools. This cooling causes the water vapor to condense back into tiny water droplets or ice crystals.

3. Cloud Formation: These condensed droplets or crystals cluster together to form clouds.

4. Precipitation: As the water droplets or ice crystals within the clouds grow larger and heavier, they become too heavy to remain suspended. They fall back to Earth as precipitation, which can be rain, snow, sleet, or hail depending on the temperature.

So, falling water drops are the result of rain, not the cause. The process of rain is driven by the evaporation, condensation, and precipitation cycle.