Online College Courses for Credit



Author: Nathan Lampson

This lesson will describe that a catalyst is something which can speed up a reaction by lowering activation energy.

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

47 Sophia partners guarantee credit transfer.

299 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 33 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.



Chemical reactions require energy in order to begin. The amount of energy required in order for a chemical reaction to take place is called the activation energy.  

Catalysts speed up chemical reactions by lowering the activation energy required. 

Lactase is a catalyst called an enzyme that is found in the human body.  Lactase speeds up chemical reactions that break dairy products down into simple sugars that can be used by the body.