Endo or exo

In an exothermic reaction, heat is ...

• taken in
• given out

In an endothermic reaction, heat is ,,,

• taken in
• given out

Is the combustion of gasoline endothermic or exothermic?

• Endothermic
• Exothermic

Do reactants in an endothermic reaction have a higher or lower energy than the products? 

• Higher
• Lower

In an endothermic reaction, reactants take in energy. Would the reactants have a higher or lower energy than the products? 
Reactants → Products

• Higher
• Lower

Do the reactants in an exothermic reaction have a higher or lower energy than the products?
Reactants → Products

• Higher
• Lower

A chemical reaction that requires energy is an

• exothermic reaction 
• endothermic reaction