Chemical Reactions

A chemical reaction that start releases energy into the environment (light, heat, sound...) is called a _________________ reaction

If the reactants have 

higher chemical energy than the products of the reaction do, it is an _________________ reaction

This graph show the progress of a(n) _________________ reaction

In an endothermic reaction the reactants have ____________ chemical energy than the products

In an endothermic reaction, energy must be _________________ for the reaction to proceed.

Photosynthesis is an example of an