Great lab activity to investigate Solids, liquids and gasses. Students use a regular water bottle (16.9 ounces/500mL). Bottles are filled half way. Two antacid tablets are crushed and placed in a balloon and balloon is placed over top of bottle and as pieces of tablet fall into the balloon gas is produced to blow up the balloon. Included are the instructions in Word, as a SMARTboard visual and an exit slip closure card.