system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is some rain little droplets and some rain are big old fat drops?
gpt
Rain forms when little particles of dust start getting water stuck to them in the cloud. When they get heavy enough, they fall. Sometimes, the wind is blowing upwards and the drops have to be heavier before they fall; this is how hailstones are made, too. Sometimes there's no wind blowing upwards, but the raindrops form way high up in a really thick cloud and keep collecting water as they fall. They don't fall very fast, so they have time to pick up a lot sometimes. When they form close to the ground they don't have enough time to pick up much extra water.


Edit: huh, needed a semicolon for once.