Final answer:
Saturated fats are solid at room temperature because they contain saturated fatty acids with no double bonds in the carbon chains, while unsaturated fats contain double bonds in the carbon chains, resulting in a liquid state at room temperature.
Step-by-step explanation:
Saturated fats are solid at room temperature because they contain saturated fatty acids with no double bonds in the carbon chains. The lack of double bonds makes the fatty acids straight and tightly packed together. Unsaturated fats, on the other hand, contain double bonds in the carbon chains, which introduce kinks and prevent tight packing, resulting in a liquid state at room temperature.