A reaction in which heat energy is absorbed or taken into the system is called __________?

1. Exothermic reaction
2. Endothermic reaction
3. Elimination reaction
4. Thermite reaction

An endothermic reaction is a chemical reaction that absorbs heat energy from its surroundings. This results in a decrease in the temperature of the surroundings. The absorbed energy is used to break chemical bonds in the reactants. Exothermic reactions release heat, and elimination and thermite are types of reactions that can be exothermic.