Questions with no answer key.
You are marked on how you argue — the evidence you bring, the weaknesses you name before anyone else names them, and whether you took on the strongest version of the other position rather than the easiest one.
Grade 11 raises the bar in one specific way. Chemistry hands you numbers, and a number used in an argument has to be defended like any other claim: what was measured, with what instrument, under what conditions, and how well. “There is a lot of it in there” is not a position. “It is 0.84 g in a 250 g sample, from a balance that reads to 0.01 g, and here is why that matters” is.
Changing your mind out loud is a win
If you hear something better than what you walked in with and say so, that is the best thing that can happen in this room, and I will say so at the time. Nobody has ever lost marks here for being persuaded.