The Carbon Dioxide Experiment
Reported by David, Betsy, and Eve
Our experiment in science was to prove that fish exhale carbon dioxide.
We did this by placing a goldfish in a cup of water, then we added BTB which indicates carbon dioxide.
BTB starts as a shade of blue. When BTB interacts with carbon dioxide, it turns to a shade of yellow, depending on how much BTB was put in the water.
After about an hour, we looked at the cup with BTB, water, and the goldfish. Believe it or not, our experiment worked! The water was now a bright yellow!
