what does an exothermic reaction do?

what do endothermic reactions do?

give examples of an exothermic reaction

give examples of endothermic reactions

what is a compound?

what are the formulas for:
carbon dioxide
carbon monoxide
water
methane

what is the formula magnesium chloride?

what is a synthesis reaction?

give the symbol equation for magnesium+oxygen=magnesium oxide

what is a decomposition?