A popular science project for school is to build a volcano with different ingredients, including a bottle and cone made from with paper mache, plaster, clay or a dough mix. To produce the effect of lava flow, some ingredients used are diet soda and scotch mints or a combination of vinegar and baking soda.
To make a very simple volcano model, students can use supplies, such as a plastic soda bottle, flour, warm water, oil, salt, food coloring, large aluminum baking pan, bowl, funnel, dish detergent soap, vinegar and baking soda. It can take about 30 minutes to make this chemistry project, which demonstrates how the chemical reaction between the baking soda (base) and vinegar (acid) simulate an eruption and subsequent lava flow.
- Make the cone shape for the volcano
- Fill the bottle
Mix together seven cups flour, 2 1/3 cups salt, 4 2/3 tablespoons of oil and 2 1/3 cups of warm water in a bowl until the mixture consistency is firm. Place the bottle in the middle of the aluminum pan and place the dough around the bottle to form a cone shape. Make sure that the bottle opening is free of dough.
Place a funnel in the bottle opening, pour warm water into it until the bottle is half full. Add seven drops of detergent soap, five drops of food coloring and 2 1/3 tablespoons of baking soda to the bottle. Pour about an ounce of vinegar slowly into the bottle and wait for the eruption to occur.