For this quiz, I got a table of metal melting points, so I could make questions like this: "Which is hotter, red-hot platinum or lava?" (Btw, this sort of question requires pictures, because they don't know "lava", "platinum" [which I chose because the Japanese for it sounds alike ("platina")], or "red-hot".)
I remembered this xkcd What If, which says that liquid tungsten is so hot that if you dropped some of it into molten lava, the lava would freeze the tungsten. I thought that that was so cool! But looking at that table, I see that that is true for many much more commonplace metals. Molten lava would freeze molten iron, steel, platinum, silicon, nickel, titanium, and iridium. Depending on the type of lava, it might also freeze copper. People work with temperatures far hotter than the 700-1200 C that lava is at every day.
