Lesson 5: Chemical Energy

Wrapping Up


Review the definitions of an atom, a molecule, and a compound. Try to explain to your parent what occurs during a chemical reaction. Think about the difference between an exothermic reaction and an endothermic reaction.

Questions to Discuss

  • What is a chemical reaction? (When two substances, or reactants, are mixed, the chemical bonds between atoms are broken or rearranged, and new products are formed.)
  • What is the difference between an endothermic reaction and an exothermic reaction? (An endothermic reaction takes in heat energy and turns it into bond energy. An exothermic reaction changes bond energy to heat and/or light.)
  • How are matter and energy similar? (You cannot create or destroy matter or energy, but you can change matter and energy into different forms.)

Things to Review

Review the difference between an atom, a molecule, and a compound.