instruction:
Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
question:
Question: Where do polychaete worms live? Answer: the ocean floor
answer:
Polychaete worms live on the ocean floor. They may be sedentary filter feeders or active predators or scavengers. Active species crawl along the ocean floor in search of food.

question:
Question: What cannot be created or destroyed in a chemical reaction? Answer: matter
answer:
Law stating that matter cannot be created or destroyed in chemical reactions.

question:
Question: The term "vapor" refers to the gas phase when it exists at a temperature below what? Answer: boiling temperature
answer:
for low temperatures, where the phase can change from a gas to a liquid. The term "vapor" refers to the gas phase when it exists at a temperature below the boiling temperature.