Today in class we investigated compounds. Compounds are 2 or more elements that have been chemically combined. We used Manganese dioxide (MnO2) and hydrogen peroxide (H2O2). When mixed together, a chemical reaction occurred. A chemical reaction is a process in which substances undergo chemical change. One of the indicators of a chemical reaction includes bubbling, or the release of a gas.
When we poured the H2O2 into a beaker with some MnO2, bubbling occurred. We slowly lowered a glowing wood splint into the beaker and the splint burst into flames. this "glowing splint" test showed that the gas released was oxygen. Take a look at this video of the activity.