question: When do gases and liquids become solids?
distractor3: at high temperatures
distractor1: at relative temperatures
distractor2: at hot temperatures
correct_answer: at low temperatures
support: We tend to think of solids as those materials that are solid at room temperature. However, all materials have melting points of some sort. Gases become solids at extremely low temperatures, and liquids will also become solid if the temperature is low enough. The Table below gives the melting points of some common materials.