Skip to main content

Make your own secret ink!

204,722 Views

2,123 Questions Answered

Best of Web

Let’s Begin…

Chemical reactions occur all around us, but they only occur under particular circumstances. What causes a chemical reaction? What must be present for a chemical reaction to occur? Let's find out together!

Determine the BEST explanation of why an indicator helps scientists.

About TED-Ed Best of Web

TED-Ed Best of Web are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.

Meet The Creators

More from Actions and Reactions