system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is my bagel so hot coming out of the toaster, compared to normal bread?
gpt
A bagel is more dense compared to most breads.  If you touch the outer surface, you're pretty much entirely touching solid material.  Solids transfer heat much faster than gasses, so you'll feel the effects of it's temperature a lot faster.  Bread is very porous so when you touch it you're touching a lot more gas compared to solid material: slower heat transfer.