What is the criterion for clean glassware?

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

The boiling point of liquids is very high what does it indicate

The rules of engagement (roe) working group is often used to (select all that apply.)