Not bad
Yes
It is extreemly bad for them
osteoporsis
osteoporsis
Popcorn will keep nicely on the shelf for at least a year. Freezing it will dehydrate it which will not let it pop. Popcorn's cooking properties involve the internal moisture of the kernal, so freezing it would be bad.
Because its burnt.
Yes. Popcorn oil can become rancid. Always give it a smell test before using it. Rancid oil will ruin your batch of popcorn.
Ask your doctor for a bone density scan.
Bad because it is very salty and very butter-y. Corn, on the other hand is good. Popcorn has too many calories and fat.
Popcorn as such isn't anything special. Neither particularly good or bad unless you eat huge amounts. What's usually the trouble is that we usually have them with seasoning - butter and salt. Eating too much of those is bad.
No. Popcorn is made of corn. Corn has a very bad amino acid profile and low micronutrient content.