What happens to snowflakes when they are exposed to air for too long?
They turn into raindrops
They evaporate
They melt or sublimate
They grow larger
Answer
When snowflakes are exposed to air for too long, they either melt (turn into liquid water) or sublimate (turn directly from solid ice to water vapor). Bentley's method of catching snowflakes on black velvet allowed him to photograph them before these processes occurred.
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