Extensive, if you'd like here's a wiki article that explains it better: https://en.wikipedia.org/wiki/Intensive_and_extensive_properties
For a quick summerization to you or anyone else who needs it, extensive is a property that is dependent on the amount of a substance, Example mass. Intensive isn't dependent on the amount of something: color. An easy way to tell is if that property has a specific version of it: that property per kg. Entropy is usually found in tables of specific entropy.