system
Given the following post, respond as if you're commenting on Reddit:
human
If hot air rises and cold air sinks then why are the peaks of mountains so cold and places like Death Valley so hot?
gpt
Death Valley receives an awful lot of sunshine and that probably is the bulk of its heating. Mountain peaks are colder because the air is less dense at higher elevations. You can think of less dense as fewer molecules to carry the heat energy with.