Procedure: 1. Get a half-filled glass of warm and tap water. 2. Label A on the glass with warm water and B on tap water. 3. Put each tablet in each glass at the same time. Stir the mixture at the same rate. Stop after 30 seconds. Record your observation. Do the same after another 30 seconds. Observation Time (sec) 30 60 90 Guide Questions: 1. What is the constant variable in this activity? 2. What is the manipulative variable? 3. What is the responding variable? 4. Explain why they are called such type of variables.​