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 change? (When two products are mixed, the chemical bonds are broken or rearranged, and a new product is produced.)
  • 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.)
  • How are matter and energy similar? (You cannot create or destroy matter or energy, but you can change matter and energy. Heat can cause a change in matter and in energy.)

Things to Review

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