question: How is thermal mass used to keep buildings cool ?
answer: by absorbing solar energy during the day and radiating stored heat to the cooler atmosphere at night
turker_answer: Thermal mass absorbs solar energy during the day and radiates stored heat to the cooler atmosphere at night to keep buildings cool .
rule-based: Thermal mass is used to keep buildings cool by absorbing solar energy during the day and radiating stored heat to the cooler atmosphere at night .