sentence: Snow is made when temperatures are so cold that water vapor changes directly to solid crystals.
sentences_before: Air rises when cold air pushes hot air up. Cold air can push hot air up because hot air is less dense. Rain, snow, sleet, dew, frost, hail, and drizzle are all forms of precipitation. If liquid, it can be measured using a rain gauge. The most common form of solid precipitation is snow.
concept_name: snow
headings: Precipitation
categories: Meteorology Words