How would temperature changes observed using a calorimeter differ for

Question

exothermic and endothermic reactions?

Answer 1

This looks obvious to me.
Exothermic reactions release heat so the heat to the calorimeter increases and the temperature goes up inside. T rises.
Endothermic reactions absorb heat (where does the heat come from) so the calorimeter loses heat and the temperature goes down inside. T falls.