system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why when cooking something on aluminium foil in the oven you can pull it out with your bare hands, but when using a baking pan you would badly burn your hands if you tried the same thing.

Just made jalapeno poppers on aluminium foil, as opposed to a baking tray. Every time aluminium foil is used in the oven, I can grab the foil, pull it out with bare hands, and I don't get burned. Why is this different than a baking tray?
gpt
Because the foil is extremely thin, it doesn't hold a lot of heat. Also, because metals conduct heat very well they get rid of heat quickly too. The foil is really hot, but when you open the oven and cool kitchen air hits the foil, it cools the foil very fast. The baking tray is so much thicker that it has a lot more heat to get rid of, so doesn't cool fast enough for you to touch.