system
Given the following post, respond as if you're commenting on Reddit:
human
Do certain smells travel farther than others?

Sometimes, when someone is cooking in the opposite side of the house, I smell  only certain ingredients. Then, in the kitchen I can smell all the ingredients. The initial ingredient I could smell from farther away is not more prominent than the others.
gpt
Yes, smells are made of various oils and chemicals, all of which have different densities.  Some heavier compounds will sink and either not travel as far or settle near then ground.  Others are lighter and might drift upwards where you can't smell them.  Then there will be ones in the middle that may tend to diffuse everywhere.