Learn more about why chemical reactions occur by watching "What Triggers a Chemical Reaction"
. Was the secret code an exothermic or endothermic reaction? How do you know?Did you know there are different kinds of chemical reactions? Watch this video
and then think about if the secret code was a chemical or physical change!Besides being a really cool way to write secret messages, why else do we care about chemical reactions? Check out this video
and think about how chemical reactions can help us with the future of our world.