Activity+3

Activity #3: Experimenting with Chemical Changes


 * __Materials__**: 2 spoonfulls of baking soda, 60 mL vinegar, 100 mL water, beaker, tray for liquid containment.


 * __Procedure__**: Mix the vinegar and water together in the cup and add the baking soda. Do this on the tray provided to contain the liquids. Observe what happens for the next 5 minutes. Record your observations below.


 * __Observations__**:When we put the baking soda in with the water and vinegar, it started to bubble up and have a chemical reaction.


 * __Analysis__**:a gas was formed when the baking soda was combined with the vinegar and water.

when it was reacting, it gave off gas.
 * __What evidence indicates that a chemical change took place?__**


 * __Contrast chemical and physical changes (tell me how they are different). Review Activities 2 and 3 before you answer.__**