Evidence of Chemical Change
Backgrounders
Learn how to tell if a chemical reaction has taken place.
Chemical Reactions: Conditions & Speeds
Backgrounders
Learn about the special conditions that let some chemical reactions take place.
Catalytic Converters
STEM Explained
Learn about how catalytic converters make vehicle emissions less harmful.
Why Do Apples Turn Brown After You Cut Them?
STEM Explained
Has your fresh juicy apple turned an unsightly brown? Learn about the redox reaction behind the transformation.
What happens when acids and bases mix?
Hands-on Activities
Learn about acid-base reactions. Make you own pH indicator and test it with different solutions.
Microbial Fuel Cells
STEM Explained
In a few decades, some of the electricity you use might be generated by bacteria.
How can I stop bananas from turning brown?
Hands-on Activities
Explore the chemistry behind why bananas turn brown. Can chemistry also help prevent this?
How can you make popcorn kernels dance?
Hands-on Activities
Get your popcorn kernels dancing with this uplifting chemical reaction.
How does a lithium-Ion battery work?
STEM Explained
Learn about the electrochemistry in the batteries that power many of the devices you use every day.