Q: In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.
Question: When we raise the temperature of water it becomes 
 Answer: less dense
A:
When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.