Title: Energy.
Question: What is not possible unless the reactants surmount an energy barrier known as the activation energy?

Title: Lighting.
Question: Who offers the Lighting Certification Examination? 

Title: Charleston, South Carolina.
Question: Interstate 26 begins on what part of Charleston?

Title: Kievan Rus%27.
Question:
What were the "Rus" accourding to the "Normanist"?