Yes. I found that popping popcorn when it is very humid yields hardly popped kernels.
I have seen many questions on other sites asking about frozen popcorn. here's ... moisturise starts to vaporize which causes increased pressure in the kernel until .... Will frozen popcorn pop more kernels than room temperature popcorn when.
I am not sure how caramel affects the popping of the corn but after some research, I have found that most recipes require the caramel after the popcorn has popped. That is how I make it.
That's going to depend on probably at least ten different conditions that you haven't described, maybe the most important one being how many kernels there were when you started heating them.
observation
Yes, different brands of popcorn may leave different amounts of unpopped kernels due to variations in the type of kernels used, the level of moisture content, and the size and shape of the kernels. Factors such as popping method, storage conditions, and individual kernels' quality can also influence the amount of unpopped kernels.
Two physical properties of a bag of microwave popcorn before popping are its mass and volume, which remain constant before and after popping. Two chemical properties that change after popping are the composition of the kernels, which undergo a chemical reaction to turn into fluffy popcorn, and the release of aroma compounds due to the Maillard reaction during popping.
Bagged kernels for stovetop popping would be cheaper than popped corn in a bag or unpopped microwave.
In the popcorn industry, unpopped kernels are known as "old-maids".
You could try popping it. Usually you can tell very quickly, because if the kernels are too old, they won't pop very well. For microwave popcorn, the kernels will remain at the bottom of the bag. Popcorn has a shelf life of approximately two years. After this, it loses moisture and can become stale. It can also expire if the kernels are not stored properly. Popcorn dries out. The tiny bit of moisture inside the kernel is what causes it to pop. Without the moisture, the kernel remains.
Popping ability it related to the toughness of the outer hull of the popcorn and the moisture content of the kernel. The best popping brands have a thinner outer shell and a higher moisture content. They have been hybridized to produce these qualities.
Counting the popped kernels in an experiment to determine if the popping of popcorn is affected by storage temperature is an example of quantitative data collection. By quantifying the number of popped kernels, researchers can analyze the results statistically to draw conclusions about the relationship between storage temperature and popping rate.