How can rock molecules squeezed tighter together behave like liquids with molecules spread farther apart? Usually when heat liquefies a solid such as ice, the molecules become less dense and spread more apart the higher the temperature gets.
Yet the rock behaves as though its molecules are spread apart when instead it’s crushed together under hundreds of kilometers deep into the Earth.
**Bonus** 2 questions if anyone else can get to them:
The molten rock even rises and sinks like water when different in temperature or density, but that seems like an oxymoron under those immense pressures because the only way for higher temperature rock to rise like a liquid with spread out molecules is for the rock to be more crushed together by higher pressure.
Can enough pressure make the rock become a gas like air?