Evidence of Chemical Change
Learn how to tell if a chemical reaction has taken place.
Chemical Reactions: Conditions & Speeds
Learn about the special conditions that let some chemical reactions take place.
What is an exothermic reaction?
Things are heating up! Explore the temperature change that occurs in an exothermic reaction and the role of catalysts is this chemistry activity.
The Cold Pack: A Chilly Example of an Endothermic Reaction
When you hurt your ankle, thermodynamics can help you heal! An endothermic reaction reduces the swelling by cooling your injury.
The History and Uses of Hydrogen
Hydrogen’s tendency towards combustion is what makes it both a dangerous chemical element and a useful energy source.