Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change ...

The Kids & Chemistry program offers hands-on activity guides ... Investigate the secret science in self-inflating balloons with students to introduce foundational concepts about chemical reactions.

The Chem-E-Car competition races cars which are only powered by chemical reactions. The goal is to come up with an elegant solution – you can’t simply jettison matter out the back as the ...