Orange Fizz

Materials

• 1 orange or clementine

• 1/2 tsp baking soda

Directions

1. Cut the orange into slices or peel separate into sections

2. Dip a slice or section into the baking soda

3. Take a bite! As you chew, it should start to bubble in your mouth

What’s Happening
When acids and bases mix, you get some exciting chemistry! Oranges are filled with citric acid. Baking soda is a base, the opposite of an acid. As the citric acid and baking soda mix, it makes millions of carbon dioxide bubbles, the same gas you breathe out, and the same one that makes soda so fizzy.

adapted from ScienceFun.org