In order to fully understand this experiment, the variables need to be explained. Barley otherwise known as Hordeum vulgare, is a hardy cereal that has coarse bristles …show more content…
We are adding 1 tablespoon of tonic water which contains carbon dioxide. This is will help increase the rate of growth of the barley because plants take in carbon dioxide for photosynthesis. The ingredients of Tonic Water are macronutrients for plants to grow. These include carbon dioxide, oxygen, hydrogen, phosphorus, sodium, sulfur, and potassium. The tonic water should also help increase the rate of production because it contains macronutrients that are helpful to the growth of plants. In addition to testing Tonic Water, we are adding one tablespoon of sugar to the water. Sugar is a crystalline substance that typically consists of sucrose. By adding the sugar, this should help increase the rate of production with the Barley. This is because plants produce sugar to eat which helps them grow. By providing additional sugar, it should allow for a faster production of the