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: What hydrocarbons contain only single bonds between carbon atoms? Answer: saturated hydrocarbons
Saturated hydrocarbons are hydrocarbons that contain only single bonds between carbon atoms. As a result, each carbon atom is bonded to as many hydrogen atoms as possible.

Question: What happens when an increase in temperature of a gas in a rigid container happens? Answer: pressure increases
An increase in temperature of a gas in a rigid container increases the pressure.

Question: What is the temperature where molecular motion stops? Answer: absolute zero
Absolute zero is the temperature where molecular motion stops and is the lowest possible temperature.