Today room 28 split into groups of three to do the exploding lunch bag experiment. First we put some baking soda into tissue-paper next we put some warm water followed by some white vinegar into the zip-lock bag we carefully put the baking soda and held it above the liquid and zip locked the bag shut.  

 Finally we put the baking soda into the liquid and shook the bag and dropped the bag on the ground 5 seconds later... BOOM!

The bag exploded because baking soda and vinegar are two different substances and combined they created gas called carbon dioxide which built up pressure which causes an explosion.  During this experiment we learnt that two different substances like vinegar and baking soda will cause another chemical reaction and cause an unlikely explosion.

Watch the link below to see what happens.

http://youtu.be/wtKZ3E4Kc9Q