Welcome to the LARGEST STEM EXPO in Texas!

We hope you had a great time today at Dallas ISD STEM Expo 2020!

We value your participation and continued passion for all things STEM! If you haven't already, please explore and enjoy all the educational booths the Expo has to offer.

On behalf of DISD's STEM department and Mad Science of DFW, thank you for coming. Have a STEMtastic day!

Mad science booth at a trade show with people around looking at the experiments

pH Rainbow

Crazy chemistry of acids and bases

Chemicals can contain different quantities of hydrogen ions. Hydrogen is a colorless, odorless, non-metallic, and tasteless gas. Some pH (power of Hydrogen) indicators change colors to show the amount of hydrogen ions present in a chemical. The pH scale helps scientists determine whether a chemical is acidic, basic, or neutral. Different liquids have different pH values.
A chemical reaction occurs when an acid and base mix. Vinegar is an example of an acid. Clay is an example of a base.