1. Research Title: The Effect of Chlorine on Plant Growth2. Identify the Problem: Does chlorine affect the growth of plants?3. Formulate Hypothesis: If chlorine is added to the water, then the growth of the plants will be inhibitedList of Variables1. Controlled VariablesType of soilSize of potsSpecies of seedlingsAmount of waterExposure to sunlight2. Independent VariablePresence of chlorine in the water3. Dependent VariableGrowth of the plants (height, number of leaves, etc.)